front 1 Once sperm are deposited into the vagina, sperm motility must be enhanced and they must be prepared to release hydrolytic enzymes from their acrosomes. What is this process called? | back 1 capacitation |
front 2 Which of the following occurs 21-30 weeks into pregnancy, during the fetal period? | back 2 Blood cell production in the bone marrow. |
front 3 Proteases and acrosin are enzymes. How do they function in reproduction? | back 3 They act to break down the protective barriers around the egg, allowing the sperm to penetrate. |
front 4 correct statement about fertilization | back 4 Millions of sperm cells are destroyed by the vagina's acidic environment. |
front 5 A zygote is usually formed within the uterus. | back 5 false |
front 6 Together, what do the decidua basalis and the chorionic villi form? | back 6 placenta |
front 7 Implantation begins six to seven days after ovulation. | back 7 true |
front 8 Which germ layer gives rise to the nervous system? | back 8 ectoderm |
front 9 Which of the following INCORRECTLY matches an embryonic structure with its function? | back 9 yolk sac: provides nutrients to developing embryo |
front 10 Muscle tissue is formed by the ________. | back 10 mesoderm |
front 11 Of the three germ layers, the mesoderm forms the most body parts. | back 11 true |
front 12 Which fetal vascular shunt directly connects the right atrium to the left atrium so as to bypass the nonfunctional lungs? | back 12 foramen ovale |
front 13 What does the hormone relaxin promote? | back 13 Relaxin promotes the widening and increased flexibility of the pelvic ligaments and pubic symphysis. |
front 14 Because of the increased bulkiness of the anterior abdomen and the change in a pregnant woman's center of gravity, what type of spinal curvature do many pregnant women develop? | back 14 excessive lordosis of the lumbar spine |
front 15 Which of the following is the primary germ layer that forms the basis for the musculoskeletal system? | back 15 mesoderm |
front 16 Which of the following occurs 9-12 weeks into pregnancy, during the fetal period? | back 16 Sex is readily detected by observing the genitals. |
front 17 Teratogens may cause anatomical abnormalities in an embryo, but do not cause anatomical abnormalities in a pregnant woman because ______. | back 17 organogenesis does not occur in an adult |
front 18 Which body system of a pregnant woman undergoes the most dramatic physiological changes during pregnancy? | back 18 cardiovascular system |
front 19 What role does oxytocin play in promoting labor? | back 19 Oxytocin stimulates the uterus to contract. |
front 20 The placenta and its attached fetal membranes are collectively called the afterbirth. | back 20 true |
front 21 What does the ductus arteriosus become at birth? | back 21 ligamentum arteriosum |
front 22 During pregnancy, which hormone is responsible for stimulating maturation of the breast for lactation? | back 22 human placental lactogen (hPL) |
front 23 leads to the development of a morula and then a blastocyst | back 23 cleavage |
front 24 embedding of the blastula in the uterine wall | back 24 implantation |
front 25 leads to the formation of the first cell of the new individual
| back 25 fertilization |
front 26 leads to the establishment of the three primary germ layers | back 26 gastrulation |
front 27 Leads to enhancement of sperm motility and increasing membrane fragility to enable enzyme release from acrosomes. | back 27 capacitation |