front 1 How long is the secondary oocyte viable and capable of being fertilized after it is ovulated?
| back 1 12-24 hours |
front 2 At what point is meiosis II completed for the female gamete?
| back 2 fertilization |
front 3 During which stage of labor is the fetus delivered?
| back 3 expulsion stage |
front 4 The embryo is directly enclosed in and protected by the amnion.
| back 4 True |
front 5 Which hormone maintains the viability of the corpus luteum?
| back 5 human chorionic gonadotropin |
front 6 Which of these is the innermost (closest) structure that completely surrounds the embryo?
| back 6 amnion Ex. The amniotic fluid, found in the amnion and intimate with the embryo, protects the embryo from physical trauma and maintains a constant homeostatic temperature. |
front 7 The trophoblast is mostly responsible for forming the ________.
| back 7 placental tissue |
front 8 What cellular area shown in the figure secretes human chorionic gonadotropin (hCG)?
| back 8 syncytiotrophoblast Ex. Syncytiotrophoblast cells begin to secrete human chorionic gonadotropin (hCG) following implantation. |
front 9 Thalidomide was once used to treat intense nausea and morning sickness in pregnant women. Unfortunately, if administered at certain points during gestation it resulted in limb malformation. This drug is an example of a(n) ________.
| back 9 teratogen |
front 10 Which of the following is the longest stage of labor, lasting 6-12 hours or more?
| back 10 dilation stage Ex. The dilation stage often lasts the longest, up to 12 hours or more. |
front 11 The period from fertilization through week eight is called the embryonic period.
| back 11 True |
front 12 What role does oxytocin play in promoting labor?
| back 12 Oxytocin stimulates the uterus to contract. Ex. Oxytocin from fetal cells, and eventually the posterior pituitary, stimulates the uterus to contract both directly and through the release of prostaglandins. |
front 13 Once sperm are deposited into the vagina, the sperm's motility must be enhanced and they must be prepared to release hydrolytic enzymes from their acrosomes. What is this process called?
| back 13 capacitation Ex. Sperm must undergo capacitation in order to gain the ability to penetrate and fertilize an oocyte. |
front 14 Which of the following implants in the mucosa of the endometrium?
| back 14 blastocyst Ex. The blastocyst implants after about seven days. It consists of a hollow ball of cells with a smaller, inner cell mass pressed to the inside wall. |