Question

1 points

Question 38

1. Where does gonadotropin hormone come from and what does it do?

1 points

Question 39

1. Menstruation is part of the uterine cycle. Why does it happen?

   	A.	Estrogen levels increase at ovulation, causing the development of the endometrial vaginal lining in preparation for pregnancy. If there is no pregnancy, the lining is shed.
   	B.	Scientists have not entirely explained why women menstruate.
   	C.	The corpus luteum secretes estrogen and progesterone, causing development of the endometrial ovarian lining in preparation for possible pregnancy. If no pregnancy occurs, hormone levels plummet and the lining is shed.
   	D.	When an egg is released, the endometrium or uterine lining develops to support an embryo in case of pregnancy. If pregnancy does not occur, the lining is shed.
   	E.	When an egg is released, there is also a release of endometrial fluid from the ruptured follicle. This must be shed in order to prepare the uterus for possible pregnancy.

1 points

Question 40

1. Do women produce more eggs or do men produce more sperm? Why?

   	A.	Women produce more eggs because they can't move and so are stuck in one place. Because sperm can move, not as many are needed.
   	B.	Women produce more eggs because the odds of any one egg getting fertilized by a sperm are not good.
   	C.	Men and women produce about equal amounts of sperm/eggs.
   	D.	Men produce more sperm because they produce it all their lives, while women are born with all the eggs they'll ever have.
   	E.	Men produce more sperm because they produce new sperm all their lives, while women just produce eggs until menopause.

1 points

Question 41

1. In addition to fairly reliable contraception, what other advantage to condoms offer both men and women?

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Question 42

1. Why would a doctor do blood tests on a pregnant woman?

   	A.	Normally, a doctor does urine tests on a pregnant woman, not blood tests.
   	B.	To look for risky sexually transmitted diseases or cancers
   	C.	To prove paternity, or who the father of the fetus is
   	D.	To make sure she was actually pregnant
   	E.	To look for risky infections, diseases, or to screen fetal blood which gets mixed into the mother's blood

1 points

Question 43

1. In the luteal phase of the uterine cycle, the endometrium breaks down if there is no pregnancy. What happens differently if there is a pregnancy?

   	A.	Implantation cues the endometrium to secrete the hormone hCG which keeps the corpus luteum actively secreting estrogen and progesterone to maintain the uterine lining for the 6-7 weeks it takes for the placenta to take over.
   	B.	Implantation cues the corpus luteum to degenerate, estrogen and progesterone levels drop, and endometrium is maintained for the duration of the pregnancy.
   	C.	The placenta develops immediately to support the embryo in the uterine lining, and it takes over secretion of estrogen and progesterone to maintain the pregnancy.
   	D.	Implantation cues the endometrium to secrete the hormone testosterone which gives the corpus luteum strength to maintain the uterine lining for the 6-7 weeks it takes for the placenta to form.
   	E.	The embryo itself implants in the uterine lining and begins secreting progesterone and estrogen to keep the corpus luteum active in order to maintain the pregnancy.

Answer 1

38. Gonadotropins are produced by the anterior pituitary gland. Gonadotropins include Luteinizing hormone (LH), Follicle stimulating hormone (FSH), human chorionic gonadotropin( hCG). These hormones regulate normal growth, sexual development and reproductive function. These hormones act on the gonads, testes in males and ovaries in females, and control gamete and sex hormone production.

39. C. The corpus luteum secretes estrogen and progesterone, causing development of the endometrial ovarian lining in preparation for possible pregnancy. If no pregnancy occurs, hormone levels plummet and the lining is shed.

40. D. Men produce more sperm because they produce it all their lives, while women are born with all the eggs they'll ever have.

41. Condoms provide the twin advantage of protection from sexually transmitted diseases to both men and women.