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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?
After a few minutes, the light should begin to look brighter. Even as this is the case, add a card and see if you can still see light. Repeat this process of gradually adding cards over a 15-minute period. Were you able to detect an increasingly dim ..
A zoologist is investigating a population of squirrels whose coat color is controlled by a single gene whose two alleles (B 1 & B 2 ) are codominant.
When the sperm cell unites with egg cell this is known as ______. Usually, this happens in the ______. After four or five days, the developing zygote arrives the uterus.
explain short-chain or long chain fatty acids. When bacteria growing at 20 degree celsius are warmed to 30 degree celsius, are they more likely to synthesize membrane lipids with.
What is the number of progeny expected in 1000
Which phyla lack organs? What kind of the symmetry do they have? State all of the phyla which show cephalization?
The characteristic (trait) could be something like coloration pattern, length of the limbs, size of the teeth or beak, or any measurable trait that is inherited.
In humans, red-gren color blindness is recessive and X-linked, while albinism is recessive and autosomal. What types of children can be manufactured as the result of marriages between two homozygous parents.
Metric Conversions using Dimensional Analysis the key to using dimensional analysis is the right use of conversion factors what is a conversion factor.
Why in the world plants evolved such beautiful colours and shapes and create such wonderful scents. What do you tell her.
Use the data provided below compute the resting membrane potential of this set of cells. Is the inside negative or positive relative to the outside ?
Choose two organelles and compare them relative to structure and function. Describe what would be the specific probable effects on the cell if each of these organelles were lost.
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