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Question: Assume your text provides an interesting explanation for the "dormitory effect", in which women living (or sometimes working) together tend to synchronize their menstrual cycles. Gonadotropin releasing hormone is not the only hypothalamic hormone, of course, so we may wonder what other parts of the hypothalamo-hypophyseal portal system is responsive to a "living or working in a group" effect. Perhaps we can smell when others are "stressed" and it causes us to change our levels of cortisol by a mechanism similar to the "dormitory effect". Explain how that pathway might work step-by-step, starting with the nose and ending with the adrenal cortex, and then describe a simple experiment to test the idea.
Question: The drug Nifedipine is mentioned in this chapter as a membrane calcium ion channel blocker, and it is used to relax the walls of blood vessels (effectively lowering high blood pressure). Explain step-by-step how blocking membrane calcium channels could have this effect, especially considering that smooth muscle has no troponin. Second, the drug is also used to slow down labor during childbirth, presumably by its action on the uterus. Would that work similarly to Nifedipine's effect on blood vessel walls?
Question: Sometimes a person having heart problems will have an artificial pacemaker implanted, as described in your text. The procedure often leads to them feeling much better - but why? Why exactly were they feeling much worse before the operation, and why did the pacemaker help?
What is involved with producing Energy (such as ATP) for muscle contraction. An organelle in the muscle cell that helps distributes the signal to contract by the interior of the cell.
Chooses the statement that best describes a buffer. A buffer prevents pH of a solution from changing while an acid or base is added.
A Drosophila experiment analyzing linkage of X-linked genes studied a recessive eye mutation, a recessive wing-vein mutation, and a recessive bristle mutation
If a cube representing the cell is 5um on a side, compute the surface area to volume ratio, and explain why this is or is not a good size for a cell.
Which magnification was most helpful in making this determination? What optical principles are involved here and describe the role of each.
What are the roles of COPI vesicles for transporting proteins between Golgi cisternae. How does a new Golgi cisterna form in the cis side from COPII vesicles.
Specify the three events in the human reproduction which contribute to genetic diversity
A drug 2,4-dinitrophenol can get into mitochondria, and carry portons from the intermembrane space, and into the matrix. Determine the effect of DNP on the ATP synthesis in the presence of oxygen?
When a yellow female Labrador retriever was mated with a brown male, half of puppies were brown and half were yellow. The same female, when mated to a brown male produced all brown puppies.
The fruit in summer squash may have different shapes. When 2-true breeding plants with disc-shaped fruit were crossed to true breeding plants with long fruit,
In bacterium that possesses antibiotic resistance and potential to persist through very adverse conditions, such as freezing, drying, or high temperatures, DNA have to be located within, or be part of, which structures.
Complete the Punnett squares for a cross between the male with blood type B and a female with blood type AB. Build two Punnett squares and answer the following given questions about them.
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