Answer:
18 Answer: Hypothalamus, Pituitary and Gonads (Testis and Ovary)
19 Answer:
GnRH (Gonadotropin Releasing Hormone) secreted by hypothalamus
LH (Leutinising Hormone) and FSH (Follicle Stimulating Hormone) secreted by Pituitary Gland
Estrogen (released by ovary) and Testosterone (released by Testis)
Explanation:
GnRh stimulates pituitary gland to release LH and FSH
LH or leutinising hormone facilitates maturity of gonads (testis and ovaries) and production of gametes.
FSH stimulates ovulation and has deep influence no menstrual cycle in female.
5-fluorouracil is a chemotherapeutic agent that is used for the treatment of certain types of cancers. which of the following is a mechanism by which 5-fluorouracil might work?
Answer: preventing the replication of DNA
Explanation: overreplication of cells, or extra cells, causes cancer. Stopping the replication of cells can prevent the cancer from worsening. I’ve also had this question on my homework and got the answer correct.
Depressants are drugs that?
Answer:
Depressants are drugs that slow down the central nervous system, leading to reduced brain activity, decreased heart rate, and relaxed muscles.
Explanation:
Which of the following are ways in which protein lateral mobility can be restricted in the plasma membrane?
[Multiple answers]
A) Proteins can be tethered to the cell cortex inside the cell.
B) Proteins can be tethered to the extracellular matrix molecules outside the cell.
C) Proteins can be tethered to proteins on the surface of another cell.
D) Diffusion barriers can restrict proteins to a particular membrane domain.
E) None of the above
Proteins are attached to the extracellular matrix, the cell cortex, and obstacles such tight junctions.
What four purposes serve the plasma membrane?Identification, communication, control of solute exchange across the membrane, and separation of the nucleus from the surrounding environment are the four primary roles of the plasma membrane.
What is a simple definition of a plasma membrane?The membrane that encloses a cell's organelles and serves as a partition between them and the outside world is referred to as the plasma membrane. Every live cell has a thin membrane called the plasma membrane that surrounds it and isolates it from its surroundings.
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which of the following nutrients must be supplied by the foods we eat to support the chemical processes of human physiology?
Proteins, lipids, vitamins & minerals are the foods eat to support the chemical processes of human physiology.
What is human physiology?
The study of how the human body works in both health and sickness is known as human physiology. A degree in human physiology offers good preparation for jobs or graduate school in the health professions, biomedical research, or allied fields.
The study of how organisms carry out their essential activities is known as physiology and comes from the Ancient Greek word phusiologa, which means "natural philosophy."A study of how a muscle contracts or the force that contracting muscles place on the skeleton are two examples.
Several forms of human physiology can be distinguished:
The primary area of human physiology in which we examine cell functioning is called cell physiology. Special physiology is a discipline of physiology where we research the operations of particular organs.To know more about human physiology, check out:
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In a large population of approximately 1 million E. coli , one bacterium gains a mutation that gives it a fitness advantage , with a selective coefficient of . Which of the following statements is FALSE ? s = 0.001 Given the population size , the selective coefficient is large enough to overcome genetic drift . It is possible that the mutation could be lost from the population due to genetic drift . The mutation will likely sweep through the population to fixation if the individual has offspring with the new mutation Ans = 0.001 would not be considered large given that population size .
It is considered "fixed" inside the population that once frequency of a allele reaches 100%, i.e., is the only genetic variant present in either member.
What do you name a gene that is fixed inside the population due to a mutation?December 2020) An allele is considered permanent if it is the only variety of that gene in the population. The entire population is heterozygous for a fixed allele. The term "allele" typically refers with one variant gene from out numerous that could exist for a specific Genomic region.
What impact does population size have on these alleles' time to fixation?The likelihood of fixation increases because individuals with the mutant gene are much more likely to reproduce in a population that is expanding. Since it's more rare and more apt to be established, the allele has a lower risk of being lost.
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A Biology student is investigating DNA replication in peony flowers; which of the
following is a specific and testable question that could guide their research?
A. What is the complementary DNA strand sequence of a peony flower?
B. What is the rate of error in DNA replication?
C. What is the error rate in complementary DNA strand sequences of peony flower
after replication?
D. What is the DNA sequence of a peony flower?
Answer: C. What is the error rate in complementary DNA strand sequences of peony flower after replication?
Explanation: This is a specific and testable question because the student can analyze the DNA sequence of a peony flower before and after replication, and compare the two sequences to determine the error rate in the complementary DNA strands.
What is the name of bacteria that inter the cell ??
your brother has a bacterial infection. he tells you he going to the gym where he plans to sit in the sauna for an hour. he thinks that this will cure his infection, because the heat in the sauna will denature the enzymes of the bacteria making him ill. you are a nursing student who is currently studying microbiology. you tell him that
Answer: His Plan with not work to fix that
Explanation: Homeostasis will keep his body temperature constant even in the sauna, so the bacteria (and his normal microbiota and body cells) will not be impacted.
Which of the following is a benefit of using chemical signals rather than electrical signals to send messages to the next neuron?
O Electrical signalsO interneuronO hippocampus
Electrical signals are not strong enough to get through the synaptic cleft. Neurons are too far apart for an electrical signal to travel. The variety of responses produced can be expanded due to the simultaneous release of many neurotransmitters. These are the advantages of using chemical impulses rather than electrical signals.
What are neurotransmitters?Neurons use neurotransmitters to interact with one other and their target tissues during the synaptic transmission process (neurotransmission).
Nerve endings synthesize neurotransmitters, which are then released from them into the synaptic cleft. From there, receptor proteins in the cellular membrane of the target tissue bind to neurotransmitters. The target tissue is stimulated, blocked, or otherwise functionally altered.
Among the more than 40 neurotransmitters found in the human neurological system, acetylcholine, norepinephrine, dopamine, gamma-aminobutyric acid (GABA), glutamate, serotonin, and histamine are some of the most significant.
What is synaptic cleft?The synapse contains a space called the synaptic cleft. It is a component of the neural network. It refers to the region where neurotransmitters move back and forth between neurons. The synaptic cleft, which is a component of the neural pathway, aids in facilitating communication between the brain and nervous system.
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Help please help I am die I am desperate big reward $$$
Answer: hypertonic, hypotonic, isotonic
Explanation:
Answer:
hypertonic hypotonic isotonic
A cell is placed in a hypertonic solution. Which will most likely occur as homeostasis is maintained in the cell?.
Answer:
shrivel and die
Explanation:
A cell placed into a hypertonic solution will shrivel and die by a process known as plasmolysis. An isotonic solution is any external solution that has the same solute concentration and water concentration compared to body fluids. In an isotonic solution, no net movement of water will take place.
how is nitrogen obtained by animals
Answer:Animals get the nitrogen they need by eating plants or other animals that contain nitrogen.
Explanation: When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water.
Oxygen binding is monitored for a solution of hemoglobin. During the experiment, the curve changes from sigmoidal to hyperbolic. Which of the following may be the reason for the change?
A positive allosteric effector was added.
A negative allosteric effector was added.
The protein dissociated into individual subunits.
The protein denatured.
During experiment, curve changes from sigmoidal to hyperbolic, the following may be the reason for the change : The protein dissociated into individual subunits.
How does oxygen bind to the hemoglobin?Hemoglobin molecule has four binding sites for oxygen molecules, iron atoms in the four heme groups and thus, each Hb tetramer can bind four oxygen molecules. From molecular weight of Hb, it is calculated that 1 g of Hb can combine with 1.39 ml of oxygen.
Oxygen is one of the substances transported with assistance of red blood cells and RBC contains a pigment called hemoglobin and each molecule of which binds four oxygen molecules. Oxygen molecules are carried to individual cells in the body tissue where they are then released.
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