Question 1. At about what point in gestation can an ultrasound exam determine the sex of the fetus?
about 20 weeks after fertilization
about 4 weeks after fertilization
at the end of the second trimester
at the end of the first trimester
Question 2. At about what point in gestation does the fetal heartbeat become audible by stethoscope and the fetus's movements easily felt by the mother?
30 weeks
15 weeks
25 weeks
20 weeks
Question 3. In a human female reproductive system, the ________.
vagina secretes hormones that help maintain the uterine lining
labia minora are a pair of thick, fatty ridges that protect the entire genital region
outer features are collectively called the vulva
hymen partly covers the cervical opening
Question 4. In human females, the ovarian cycle begins when the ________.
levels of estrogen reach their maximum
levels of FSH and LH drop precipitously
hypothalamus stimulates the anterior pituitary to increase its output of FSH and LH
level of progesterone drops precipitously
Question 5. Menstruation ________.
is stimulated by HCG
involves the breakdown of the endometrium
is triggered by an LH surge
occurs after ovulation but prior to degeneration of the follicle
Question 6. What advantage is associated with human testes located in an external sac rather than in the abdominal cavity?
the testes can be kept cooler than the body's interior
the testes can enlarge at sexual maturity
the testes can be kept at a constant temperature
a shorter distance that semen must travel during ejaculation
Question 7. What is gestation?
pregnancy
conception
development
fertilization
Question 8. Where does the embryo normally implant?
in the follicle of the ovary
in the corpus luteum
in the endometrium of the uterus
in the oviduct
Question 9. Where in a woman's reproductive tract does fertilization most often take place?
in the ovary
in the oviduct
in the uterus
in the follicle
Question 10. Which one of the following statements is TRUE?
Tubal ligation prevents ovulation.
Morning-after pills are about 25% effective at preventing pregnancy.
Natural family planning is one of the most reliable forms of birth control.
A vasectomy involves removing a section of each vas deferens.