 |
1 | |
To function normally, sperm and the cells of the testes require the presence of |
| | A) | testosterone. |
| | B) | LH. |
| | C) | FSH. |
| | D) | all of the above |
|
|
2 | |
A single ejaculation from a nonsterile male may contain |
| | A) | a million sperm. |
| | B) | twenty million sperm. |
| | C) | a hundred million sperm. |
| | D) | several hundred million sperm. |
|
|
3 | |
A female is born with about ____ oocytes, of which about ___ will mature during her lifetime. |
| | A) | one thousand, one hundred |
| | B) | one hundred thousand, one thousand |
| | C) | two million, four hundred |
| | D) | ten million, one hundred |
|
|
4 | |
Fertilization of an egg normally takes place when the sperm and egg unite in the |
| | A) | vagina. |
| | B) | uterus. |
| | C) | fallopian tube. |
| | D) | ovary. |
|
|
5 | |
The follicular stage of the reproductive cycle is initiated by the binding of ____ to the surface of the cells surrounding the egg. |
| | A) | LH |
| | B) | FSH |
| | C) | estrogen |
| | D) | progesterone |
|
|
6 | |
A rise in the level of ____ causes the hypothalamus to signal the pituitary to cut off production of FSH. |
| | A) | LH |
| | B) | progesterone |
| | C) | estrogen |
| | D) | prolactin |
|
|
7 | |
The corpus luteum produces ____, which inhibits FSH, preventing further ovulation. |
| | A) | LH |
| | B) | prolactin |
| | C) | estrogen |
| | D) | progesterone |
|
|
8 | |
The onset of menstruation is caused by decreasing levels of |
| | A) | LH. |
| | B) | FSH. |
| | C) | estrogen. |
| | D) | progesterone. |
|
|
9 | |
The simplest and most reliable way to avoid pregnancy is |
| | A) | abstinence. |
| | B) | coitus interruptus. |
| | C) | use of a condom. |
| | D) | use of birth-control pills. |
|
|
10 | |
By the end of _____, distribution of cells into the three primary tissue types has been accomplished. |
| | A) | cleavage |
| | B) | gastrulation |
| | C) | the formation of the blastocyst |
| | D) | neurulation |
|
|
11 | |
Normal body temperature (37°C or 98.6°F) is too warm for sperm to successfully develop. |
| | A) | true |
| | B) | false |
|
|
12 | |
Sperm develop their motility while being stored in the vas deferens. |
| | A) | true |
| | B) | false |
|
|
13 | |
If an egg is fertilized, it will attach itself to the endometrium to continue development. |
| | A) | true |
| | B) | false |
|
|
14 | |
During cleavage, the size of the embryo increases with each doubling of the number of cells. |
| | A) | true |
| | B) | false |
|
|
15 | |
The formation of body organs begins in the fourth week of pregnancy. |
| | A) | true |
| | B) | false |
|
|
16 | |
By the end of the third month, the fetus has developed all the major organs and begins moving its arms and legs. |
| | A) | true |
| | B) | false |
|
|
17 | |
Blood from the fetus and blood from the mother are exchanged in the placenta. |
| | A) | true |
| | B) | false |
|
|
18 | |
Birth-control pills work by preventing ovarian follicles from ripening and being released. |
| | A) | true |
| | B) | false |
|
|
19 | |
As a method of birth control, condoms have a failure rate of up to 15%. |
| | A) | true |
| | B) | false |
|
|
20 | |
Neurological development of the fetus is completed by the end of the third trimester. |
| | A) | true |
| | B) | false |
|