Question

Question 38

1. Following intercourse, sperm don't survive for more than a few hours in the oviduct, so fertilization has to happen fairly quickly. True or False?

   	A.	False. Fertilization has to happen right away because sperm don't survive more than a few minutes once released.
   	B.	True. Sperm don't survive more than a few hours.
   	C.	False. Sperm can survive in the oviduct for up to five days.
   	D.	True. If there isn't an egg there ready to be fertilized when intercourse occurs, fertilization won't occur.
   	E.	False. Sperm can survive for weeks under the right conditions.

1 points

Question 39

1. In hormonal contraception, delivered by pill, implant, patch, or injection, which hormones are involved?

   	A.	Progesterone and estrogen
   	B.	Estrogen and testosterone
   	C.	Progesterone and chorionic growth hormone
   	D.	Testosterone and progesterone
   	E.	FSH and estrogen

1 points

Question 40

1. Where does the corpus luteum come from and what does it do?

   	A.	The ruptured follicle of the ovary develops into the corpus luteum once the egg is released. It secretes estrogen and progesterone in preparation for pregnancy.
   	B.	When the oocyte undergoes meiosis to produce an egg, one of the resulting cells becomes the corpus luteum, and it secretes estrogen and testosterone in preparation for pregnancy.
   	C.	When the oocyte undergoes meiosis to produce an egg, one of the resulting cells becomes the corpus luteum and it secretes estrogen and progesterone in preparation for pregnancy.
   	D.	The ruptured follicle of the ovary develops into the corpus luteum once the egg is released. It secretes estrogen and testosterone in preparation for pregnancy.
   	E.	The corpus luteum is the uppermost portion of the uterus and it secretes estrogen and progesterone in preparation for pregnancy.

1 points

Question 41

1. The female reproductive tract helps sperm along to the egg, but weeds out the less robust sperm. How and why?

   	A.	Cervical mucus catches weak swimmers initially and only healthy sperm can attach to the oviduct to wait for the egg. Only healthy sperm get a chance to fertilize an egg.
   	B.	Cervical mucus helps the sperm along but the cervical cap catches weak ones, and then weak ones can't hold on in the oviduct to wait for the egg. Only healthy sperm get a chance to fertilize an egg.
   	C.	The female reproductive tract doesn't really help or hinder sperm. It provides the egg and a place for an embryo to attach.
   	D.	The female reproductive tract is so long that only strong sperm can actually make it to the oviduct where the egg is released. Only healthy sperm get a chance to fertilize an egg.
   	E.	The female reproductive tract only helps sperm but contracting and providing mucus for swimming and chemical cues to find the egg. The more sperm that gets in the better.

1 points

Question 42

1. XY and XX embryos have both Wolffian and Mullerian ducts. In a normal XX embryo, ovaries develop. Which ducts are maintained?

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 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.
   	C.	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.
   	D.	Implantation cues the corpus luteum to degenerate, estrogen and progesterone levels drop, and endometrium is maintained for the duration of the pregnancy.
   	E.	The placenta develops immediately to support the embryo in the uterine lining, and

Answer 1