The reticular formation area's diffuse input to a cortex, relayed by the thalamus, maintains the cortex active throughout awake.
The hypothalamus and brain stem, situated at the bottom of the brain, collaborate to regulate when people are awake and asleep.The Ch5-Ch6 neurons' effects on arousal, attention, and sleep are thought to be partially mediated via the reticular activating system, which is conventionally linked to the thalamic intralaminar and reticular nuclei.Visceral, somatic, & sensory systems all provide information to the RAS. This system uses acetylcholine, serotonin, noradrenaline, dopamine, histamine, and hypocretin as neurotransmitters. The cerebellum may play a role in controlling sleep and/or wakefulness because cerebellar dysfunction can cause sleep disturbances such excessive daytime sleepiness.
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how many arteries of the body?
Yet, there are more than 20 major arteries in the body, and these arteries subsequently divide into countless smaller arterioles and capillaries. Blood is transported throughout the body by this enormous network.
Each artery has three layers, the innermost of which is smooth. In the human body, there are roughly 20 major arteries. Each artery is composed of three layers: inflexible, thicker, and more muscular tissue. It is bordered with smooth tissue and is separated into three arteries.
Your heart receives its blood from channels called coronary arteries. At the aorta's base, they diverge. the left circumflex artery, the left anterior descending, the left major coronary, and the right coronary artery.
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Why do descriptions of cell structure often lump bacteria and archaea together?
a) Bacteria and archaea are closely related genetically
b) The cells components are nearly identical chemically
c) The cells have the same general structure
The cell structure descriptions lump the bacteria as well as the Archaea together as they have the same general structure.
The correct option is option C.
Both Bacteria as well as the Archaea are prokaryotes and unicellular microorganisms with contain no nuclei, unlike the Eukarya which includes animals, plants, fungi, as well as some single-celled protists.
Archaea and bacterial both have cells which lack organelles as well as the other well-defined internal membrane-bound structures. Archaea as well as Bacteria generally possess a single circular chromosome. Archaea and Bacteria also both reproduce through the process of fission which is a process in which an individual cell reproduces the single chromosome that it has and splits into two.
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Is a wedge tailed eage a tertiary consumer?
Wedge tailed eagle. A carnivore (tertiary consumer) but also a scavenger. This is the largest bird of prey in Australia. The apex predator in this food web.
What is scavanger?
Around the world, several animals that scavenge experience persecution. [Reference needed] Particularly vulnerable to human threats and harassment are vultures. The veterinary medication Diclofenac caused at least a 95% reduction of Gyps vultures in Asia before it was outlawed by regional governments in 2006. Due to the expanding human population, overhunting of vulture food supplies, modifications in cattle husbandry, and habitat loss, vulture species have declined in West Africa. The practise of poisoning some predators to enhance the quantity of game animals is still widespread in European hunting and causes poisoning in vultures when they eat the poisoned predators' carcasses.To know more about scavanger, click the link given below:
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what is one way in which algal blooms cause harm to the environment?
Answer:
in generally one environment causes by harm by naturally and man made
Of the following options, select all of the possible ways in which an enzyme can affect the rate of a biological chemical reaction A. Reduce the physical distance between reactants B. Increase the energy necessary for the reverse reaction to occur C. Manipulate the concentration of H3O+ within the catalytic cleft D. Increase the temperature within the catalytic cleft
An enzyme can affect a biological reaction by Increase the energy necessary for the reverse reaction to occur. So the correct option is Option B.
The enzymes if the human body works in the following ways:
The enzyme and the substrate generally occurs in the same area. Some situations have more than one substrate molecule that the enzyme will change.The enzyme holds on to the substrate at a special area called the active site of the enzyme.A process called catalysis occurs.The enzyme releases the product.The enzyme decreases or brings down the active energy which is required for a substrate to change into the products.
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What is the mode of heat transfer through a moving fluid medium?
Convective heat transfer is the movement of fluids, which effectively translates to the mass transfer of heat, from one location to another. The transfer of fluid molecules between locations of different temperatures.
These are some instances of convection:
When water boils, the molecules move in a circular motion because the molecules with a higher density migrate upward while those with a lower density flow downward, causing the water to become hotter.
Cooler water at the poles travels towards the equator while warm water near the equator does the opposite.
Convection facilitates blood circulation and controls body temperature in warm-blooded animals.
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____ is result of a mating where the offspring shows qualities superior to those of both parents
Cross breeding is result of a mating where the offspring shows qualities superior to those of both parents.
A intercross is an organism with thoroughbred parents of two different types, kinds, or populations. Crossbreeding, occasionally called" developer crossbreeding", is the process of breeding such an organism, While crossbreeding is used to maintain health and viability of organisms, reckless crossbreeding can also produce organisms of inferior quality or adulterate a thoroughbred gene pool to the point of extermination of a given strain of organism.
A domestic beast of unknown strain, where the strain status of only one parent or grandparent is known, may also be called a intercross though the term" mixed strain" is technically more accurate. Outcrossing is a type of crossbreeding used within a thoroughbred strain to increase the inheritable diversity within the strain, particularly when there's a need to avoid inbreeding.
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A large garden filled with an assortment of fruits, vegetables, and flowering plants was sprayed with
a chemical insecticide. What is the most likely outcome?
A,Due to the diversity of the organisms, some of them have genes that are
resistant to the insecticide and will survive.
B,Due to the all of the organisms having similar genes, they will all be destroyed by
the insecticide.
C,Due to the variation of genes in the organisms, the insecticide will destroy every
species in the garden.
D,Due to the similarity of genes in the organisms in the garden, they will all survive
the insecticide.
Inseticides are the chemical agents which are used to kill the insects in a field and to protect the field from them. thus the right statements for this question are statement A and B.
What are insecticides?Insecticides are the chemical substances used kill the insects. They work against the insects larvae and eggs. Insecticides are used in agriculture, medicine, industry and by consumers.
Insecticides are the agents which protects the cultivated fields from the harmful affects of pests and insects .To solve the problem of unwanted pests farmers and gardeners use insecticides. On the basis of this data we can say that option A and B are correct.
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how do cells appear in a negative stain?
In a negative stain, the background is stained while the cells or structures of interest remain unstained. This is typically achieved by using a negatively charged dye such as India ink, nigrosin, or eosin.
In a negative stain, cells appear clear or transparent against a dark background. Because the negatively charged dye cannot penetrate the cell wall or membrane, it is repelled by the cell and remains in the background. Because unstained cells can be seen more clearly and in greater detail than stained cells, this technique is commonly used to visualise the shape, size, and arrangement of bacterial cells. Negative staining is also useful for observing delicate or easily distorted structures that would otherwise be damaged by other staining techniques.
In microbiology, negative staining is a simple and effective staining technique used to examine the morphology of bacterial cells and other microorganisms. Negative staining, unlike other staining methods such as gramme staining, acid-fast staining, or spore staining, does not use harsh chemicals that can distort or damage delicate cell structures.
Negative staining involves the use of a negatively charged dye, such as India ink, nigrosin, or eosin, to stain the background or surrounding area of bacterial cells or other microorganisms. The dye is repelled by the negatively charged cell surface and does not penetrate the cell wall or membrane, resulting in a clear or transparent cell against a dark background.
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what are your 5 senses and how do you use them in a sentence
. why do gram-positive cells more than 24 hours old stain gram-negative?
After a day, the wall starts to deteriorate. In cultures older than 24 hours, the crystal violet-iodine complex may no longer be able to be retained.
The living thing itself. Certain Gram-positive bacteria are better than others at holding onto the crystal violet-iodine combination. This is a result of a bacterial outer membrane that contains lipopolysaccharides sandwiched between an inner cell membrane and a very thin peptidoglycan layer. Due to the high lipid content of the lipopolysaccharides, when they are dissolved in alcohol and removed, the stain is removed as well. If the decolorizing chemical is left on the cell for an excessive amount of time, Gram-positive organisms will start to look Gram-negative.
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Describe surface tension in a group of bonded water molecules
Answer:
surface tension in a group of bonded water molecules. This results in stronger bond between those molecules that actually do come in contact with one another, and a layer of strongly bonded water.
Explanation:
How many cells form at the end of Meiosis 2 and how many chromosomes do they contain?
4 cells form at the end of meiosis 2 with 23 chromosomes.
Correct. At the end of meiosis 2, four cells form, each containing 23 chromosomes. Each chromosome consists of two sister chromatids. These four daughter cells now have half of the original 46 chromosomes [1], or 23 chromosomes.
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. During meiosis, the genetic material in the parent cell is divided into two, and the two sets of genetic material are then randomly combined to form four new daughter cells, each with half the number of chromosomes of the parent cell. During meiosis, genetic variation is also introduced, as the genetic material from the parent cell is randomly shuffled and combined. This random shuffling, combined with the crossing over of genetic material during prophase I, leads to the introduction of new genetic combinations and therefore new genetic variation. This new genetic variation is vital for the survival of a species, as it allows for the continued adaptation and evolution of the species.
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What is the simple definition of homeostasis?
(HOH-mee-oh-STAY-sis) A state of equilibrium among all the body systems required for survival and proper function.
In biology, homeostasis (also known as homoeostasis in the United Kingdom) (/hm()stess/) is the state of constant internal, physical, and chemical conditions maintained by living systems. This is the state of the organism's optimal functioning, which comprises several variables, such as body temperature and fluid balance, being kept within particular pre-set boundaries (homeostatic range).
Additional factors that must be managed include the pH of extracellular fluid, the concentrations of sodium, potassium, and calcium ions, as well as blood sugar levels, which must be maintained regardless of changes in the environment, diet, or degree of activity.
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What does E. coli look like on Gram stain?
Escherichia coli (E. coli) is a type of bacteria that belongs to the family Enterobacteriaceae. It is a gram-negative bacterium, which means that it appears pink or red on a Gram stain.
On a Gram stain, E. coli will have a thin layer of peptidoglycan in its cell wall, which is surrounded by an outer membrane. The peptidoglycan layer does not retain the crystal violet stain, which is used in the Gram staining process, but instead, it retains the counterstain safranin, which gives the bacteria a pink or reddish appearance under the microscope.
The shape of E. coli is typically rod-shaped, although it can also appear in other shapes such as cocci or spiral forms. In terms of size, E. coli is a small bacterium, with a length of around 2 micrometers and a diameter of around 0.5 micrometers.
In summary, E. coli appears as a gram-negative, rod-shaped bacterium that appears pink or reddish on a Gram stain.
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which part of a membrane protein is found in contact with the interior of the lipid bilayer?
Non-polar segment of a membrane protein is found in contact with the interior of the lipid bilayer.
The internal of the lipid bilayer is non-polar, at the same time as the heads are polar molecules and create hydrogen bonds with different polar molecules. This additionally method that polar molecules like water and ions can't as effortlessly go through the nonpolar tail area of the lipid bilayer. Integral membrane proteins are embedded at once inside the lipid bilayer. Peripheral membrane proteins aren't inserted into the lipid bilayer however are related to the membrane indirectly, usually with the aid of using interactions with quintessential membrane proteins.
Thus, the part is known as non-polar segment.
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What type of anaerobic respiration is performed by human muscles?
When you workout vigorously, your muscles engage in anaerobic respiration. Compared to aerobic respiration, less energy is released because glucose is not completely broken down.
When intense activity, lactic acid accumulates in the muscles.Anaerobic cellular respiration is similar to aerobic cellular respiration in that electrons are transferred through an electron transport chain generated by a fuel molecule, thereby speeding up ATP synthesis. Many microorganisms use sulfate (SO42-) to reduce to hydrogen sulfide (H2S) as the final electron acceptor at the end of the transport chain, while others use nitrate (NO3-) to reduce to nitrite. Other nitrate reducers can further reduce nitrate to nitrous oxide (NO) or nitrogen gas.
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what is the most common anatomical order when performing a physical exam on any type of animal?
Head to tall. Animals are subjected to physical examinations using general inspection, palpation, percussion, and auscultation techniques in order to find clinical symptoms of abnormalities.
Taking vital signs, performing a basic clinical examination, and having an animal's system examined are all examples of clinical examination. The phrase "inspection" in medicine refers to examining a person or a physical part. It's the initial stage of a physical examination. The general clinical examination carefully examines each animal's body condition, conformation/shape, posture, locomotion, anomalous behaviour, body temperature, pulse, and respiration. When determining a pet's internal core body temperature, the rectal temperature is regarded as the "gold standard.
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please create facial muscles labeled and write it ?
Here is a list of some of the facial muscles and their corresponding labels: Orbicularis oculi, Zygomaticus, Buccinator, Orbicularis Oris, Levator Labii Superioris, Depressor Anguli Oris, and Frontalis.
Orbicularis oculi: This muscle surrounds the eye and is responsible for closing the eyelids.
Zygomaticus major: This muscle is located on the side of the face and is responsible for raising the corners of the mouth when a person smiles.
Buccinator: This muscle is located in the cheek area and is responsible for compressing the cheek against the teeth and lips.
Orbicularis Oris: This muscle is located around the mouth and is responsible for puckering the lips, as well as closing and protruding the lips.
Levator Labii Superioris: This muscle is located on the upper lip and is responsible for raising the upper lip, as well as the corner of the mouth.
Depressor Anguli Oris: This muscle is located on the lower lip and is responsible for lowering the corner of the mouth.
Frontalis: This muscle is located on the forehead and is responsible for raising eyebrows and wrinkling the forehead.
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A collection of stars, dust, and gas bound together by gravity is...
a
Galaxy
b
Solar System
c
Universe
Answer:
A. Galaxy
Explanation:
A galaxy is a giant, spinning object made of gas, dust, and stars held together by gravity. Galaxies come in different shapes and sizes and can contain billions of stars. Most occur in groups that are also held together by gravity.
bio 311which are characteristics of a genetic maternal effect?
The characteristic of a genetic maternal effect is that it determines the Phenotype of the offspring.
At the cellular position, this happens because motherly effect genes are expressed in diploid nanny cells and also the gene products are transported into the egg. A motherly effect is a situation where the phenotype of an organism is determined not only by the terrain it gests and its genotype, but also by the terrain and genotype of its mama . In genetics, motherly goods do when an organism shows the phenotype anticipated from the genotype of the mother , irrespective of its own genotype, frequently due to the mama supplying runner RNA or proteins to the egg.
Maternal goods can also be caused by the motherly terrain independent of genotype, occasionally controlling the size, coitus, or geste of the seed. These adaptive motherly goods lead to phenotypes of seed that increase their fitness. Further, it introduces the conception of phenotypic malleability, an important evolutionary conception.
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what type of stretching features contracting a muscle prior to stretching?
the mastoid sinuses are found in wich bone?
The posterior (rear) portion of the temporal bone, one of the skull's bones, is called the mastoid portion. Many muscles can be attached to it (through tendons) thanks to its rough surface, which also possesses blood vessel holes.
Behind the ears is where you'll find the mastoid sinuses bone. It feels like a bony protrusion if you run your fingers up the neck behind the ear. The mastoid bone's inside is ventilated.
It is hence hollow as a result. The posterior portion of the temporal bone is known as the mastoid. The mastoid process is the name for the inferior conical projection of the mastoid portion.
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Correct Question:
Where are the mastoid sinuses located?
when the bases in one strand of dna can hydrogen bond exactly with the bases in another strand of dna, then the two strands of dna are said to be ______. A. Replacable B. Complementary C. Substitutiary
B
Complementary bases include the following ones: Adenine, Thymine, Guanine, and Cytosine (G).The two strands are complementary to each other
When the bases in one stand of DNA can hydrogen bond exactly with the bases in another stand of DNA, the. the two strands of DNA are said to be complementary.In addition to one another, the bases on the left and right sides.Adenine, guanine, thymine, and cytosine are the four bases that make up each strand.The two strands are kept together internally by hydrogen bonds between complementary bases. The two strands of DNA are distinct from one another because the nucleotides in each strand must complement one another. If one sequence is ATCG, for example, the other must be TAGC.Hence, option b is correct.
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what general role do proteasomes play in the cell?
Proteasomes destroy unwanted or damaged proteins through a process known as proteolysis.
Proteasomes are a key mechanism by which cells control the concentration of specific proteins and degrade protein molecules. A small protein is called ubiquitin tags proteins for degradation. Ubiquitin ligases are enzymes that catalyze the tagging reaction.
When a protein is tagged with a single ligase molecule, other ligases respond by attaching additional ubiquitin molecules. As a result, the proteasome binds to the polyubiquitin chain, allowing it to debase the tagged protein. The degradation process produces peptides ranging in length from seven to eight amino acids, which can then be further diminished into shorter sequences of amino acids and used in the synthesis of new proteins.
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according to this phylogenetic tree, which of these pairs of prokaryotic subgroups share the most recent common ancestor?
According to this phylogenetic tree, cyanobacteria is the pairs of prokaryotic subgroups share the most recent common ancestor.
What are cyanobacteria?
Cyanobacteria (also known as blue-green algae) are a group of photosynthetic bacteria that are found in a wide range of habitats, including freshwater, marine, and terrestrial environments. They are some of the oldest known organisms on Earth, with fossil evidence dating back over 3 billion years.Cyanobacteria are unique among bacteria in that they have the ability to carry out oxygenic photosynthesis, a process that uses sunlight to generate energy and produces oxygen as a byproduct. This process is similar to the photosynthesis carried out by plants and is thought to have played a crucial role in the evolution of life on Earth by generating oxygen in the atmosphere.In terms of their evolutionary relationships with other prokaryotic groups, cyanobacteria are classified within the domain Bacteria, and are thought to be closely related to other photosynthetic bacteria such as the Chlorobi and Chloroflexi. However, the precise relationships between these groups are still the subject of ongoing research and debate among scientists, and the exact branching patterns of their evolutionary history may vary depending on the specific phylogenetic analysis being performed.
In summary, while cyanobacteria are believed to be one of the earliest and most important groups of prokaryotes in the evolutionary history of life on Earth, the specific details of their relationships with other prokaryotic groups may vary depending on the specific phylogenetic analysis being performed.
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what is the first change to occur in response to a threshold stimulus?
The first change to occur in response to a threshold stimulus depends on the type of stimulus and the system or organ involved.
In general, a threshold stimulus is the minimum amount of stimulation required to elicit a response. When this threshold is reached, the system or organ will respond with an action potential or a change in function.
For example, in a neuron, the first change to occur in response to a threshold stimulus is the opening of voltage-gated ion channels, which allows the influx of sodium ions into the cell and triggers the depolarization of the cell membrane. This depolarization generates an action potential, which is the electrical signal that travels along the neuron's axon.
In a muscle cell, the first change to occur in response to a threshold stimulus is the release of calcium ions from the sarcoplasmic reticulum. The calcium ions then bind to troponin, which causes a conformational change in the muscle fibers, leading to muscle contraction.
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write down all steps of how to focus a microscope on a slide.
The steps to focus a microscope include turning the microscope on, placing the stage far from the lens, putting the lowest objective power, putting specimen over the stage hole, lowering the objective lens and looking through the eye piece till it comes into focus.
Microscope is a very important instrument used in all labs to view and study microscopic organisms. To focus a microscope, we first have to plug in the microscope and turn the microscope light on. Then we will place the stage of the microscope far away from the objective lenses as much as possible.
After this, we will rotate the nosepiece and we do that until the lowest power objective lens gets clicked into the place. Then we look at the stage from the side and will place our specimen right over the hole in the stage. Then we will lower down the lowest objective lens using the adjustment knob until it is to the stage. We will look through the eyepiece and then we will slowly raise the objective lens using adjustment knob till the object comes into focus.
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Substances can move across the plasma membrane in two different ways—actively or passively. This activity will help you determine whether transport mechanisms actively or passively move substances across the membrane.Sort the following types of membrane transport mechanisms into active or passive processes.Active Process: Secondary active transport, Primary active transport, Endocytosis, ExocytosisPassive Process: Simple diffusion, Facilitated diffusion, Osmosis
Active Process: Secondary active transport, Primary active transport, Endocytosis, Exocytosis
Passive Process: Simple diffusion, Facilitated diffusion, Osmosis
What is an active and passive process?In biology, active and passive processes refer to the different ways in which substances can move across a cell membrane. Active processes require the cell to use energy, usually in the form of ATP (adenosine triphosphate), to move substances against a concentration gradient, from an area of low concentration to an area of high concentration.
Passive processes, on the other hand, do not require the cell to use energy. Instead, substances move across the membrane down their concentration gradient, from an area of high concentration to an area of low concentration.
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For the activated carriers widely used in metabolism NADH, NADPH, FADH2. What is the the group with high-energy linkage? o hydrogen and electrons O phosphate carboxyl group O methyl group O glucose O acetyl group
For the activated carriers widely used in metabolism NADH, NADPH, FADH2, Hydrogen and electrons are with high-energy linkage.
a is the correct option.
Energy carriers are a specific class of molecules that aid in the transmission, storing, and receipt of energy. These are key molecules in the cells that help to enable chemical reactions and other processes in the cell.
ATP (adenosine triphosphate), NADH (nicotinamide adenine dinucleotide), NADPH (nicotinamide adenine dinucleotide phosphate), and FADH2 are the significant energy carriers involved in metabolism (flavin adenine dinucleotide).
These energy transporters take in energy in the form of hydrogen atoms or electrons and distribute it to different cell components. These hydrogen and electron molecules serve as transporters for FADH2, NADPH, and NADH. Hence, choice an is the best one.
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