Question

At puberty, FSH and LH

	a.	stimulate the release of additional testosterone by the testes and the release of estrogens by the ovaries.
	b.	inhibit the release of androgens by the testes and estrogens by the ovaries.
	c.	stimulate the release of gonadotropin-releasing hormone.
	d.	inhibit the release of estrogens by the testes and testosterone by the ovaries.

Factors that might influence recent changes in the age at which puberty begins include

	a.	a cultural tendency to marry later.
	b.	reduced access to good health care.
	c.	obesity and exposure to artificial hormones.
	d.	exposure to cultural factors such as television.

Dr. West loves to drink caffeinated coffee. She knows that caffeine makes her feel awake by

	a.	blocking receptors for serotonin.
	b.	increasing the release of adenosine.
	c.	stimulating nicotinic ACh receptors.
	d.	blocking receptors for adenosine.

Answer 1

1. Answer; a) Stimulate the release of additional testosterone by the testes and the release of estrogen by the ovaries.

Reason ; During the phase of life, the male testosterone and the female estrogen are released by their appropriate organ on the response to these hormones, There will be no inhibition take place on the response of these hormone. therefore the above mentioned option would be the appropriate one.

2. Answer; C) obesity and exposure to artificial hormones.

Reason ; One of the major reason that people get puberty at their earlier age would be the above mentioned factors such exposing to certain kind of drug or food material which has some artificial hormones and being fat. Therefore the above mentioned option would be the appropriate one and the other factors are not relevant.

3. Answer; d) blocking the receptor of adenosine

reason ; while consuming the coffee, it will block the above mentioned hormone causing to prevent the dilation of the blood vessels. These will prevent the individual from feeling sleepy. so the person will fell awake and fresh. Therefore the above mentioned action is the response of taking caffeine.