Identify the correctly matched pair:
1. | cryptorchidism: failure of testes to descend into the scrotum |
2. | semen: largest contributor is prostate |
3. | puberty: stage of development before the reproductive organs become functional |
4. | primordial follicle: the first stage of meiosis for oogenesis |
Sperm-producing cells have unique antigens yet they are not attacked by the immune cells because of:
1. | antigens are recognized as self-antigens. |
2. | acrosome at the tip. |
3. | protection by the blood-testis barrier. |
4. | inhibitors attached on the surface. |
Menstrual irregularities may be seen in women athletes due to:
1. | increase in androgen secretion by the adrenal cortex |
2. | decrease in androgen secretion by the adrenal cortex |
3. | increased secretion of GnRH |
4. | decreased secretion of GnRH |
Chose the correct chronological order in which the following cells are produced:
a. | primary spermatocytes | b. | secondary spermatocytes |
c. | spermatids | d. | spermatogonia |
e | sperm cells |
1. | a,b,c,d,e | 2. | b,a,c,e,d |
3. | c,a,b,d,e | 4. | d,a,b,c,e |
A pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during an erection are called:
1. | corpus spongiosum | 2. | corpora cavernosa |
3. | crus of the penis | 4. | glans penis |
What is present in the follicles in the ovary of a girl at birth?
1. | primary oocytes | 2. | secondary oocytes |
3. | oogonia | 4. | ova |
A polar body, during oogenesis, is formed:
I: | before fertilization. |
II: | after fertilization. |
1. | Only I | 2. | Only II |
3. | Neither I nor II | 4. | Both I and II |
What maintains the corpus luteum after fertilization?
1. | release of HCG by the trophoblast to maintain the corpus luteum. |
2. | production of LH by the maternal pituitary. |
3. | maintenance of the corpus luteum by prolactin. |
4. | production of estrogen by the adenohypophysis. |
Identify the correct chronological order in which the following structures are formed:
a. blastocyst | b. morula | c. zygote |
1. | a,b,c | 2. | a,c,b |
3. | b,c,a | 4. | c,b,a |
The epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother are:
1. | chorionic villi cells | 2. | cytotrophoblast cells |
3. | inner cell mass | 4. | syncytiotrophoblast cells |