Q. No.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 |
The fluid-filled cavities near the embryonic ectoderm and the embryonic endoderm are respectively:
1. amniotic cavity, blastocele
2. amniotic cavity, yolk sac
3. blastocele, amniotic cavity
4. yolk sac, amniotic cavity
The first form of milk produced by the mammary glands of mammals immediately following delivery of the newborn is called:
| 1. | prolactin | 2. | progesterone |
| 3. | milk | 4. | colostrum |
The uterine contractions [labor pains] are initiated due to:
1. An increase in estrogen secretion
2. A decrease in oxytocin secretion
3. An increase in the progesterone: estrogen ratio
4. A decrease in FSH and LH
Fructose and prostaglandins are contributed to the seminal plasma by:
| 1. | epididymis | 2. | seminal vesicles |
| 3. | vas deferens | 4. | prostate gland |
Polar bodies:
| 1. | serve both as a dumping ground for extra sets of chromosomes and ensure that the ovum will have most of the cytoplasm. |
| 2. | get rid of of defective sets of chromosomes. |
| 3. | have no function. |
| 4. | prevent twin pregnancies. |
The term used to describe the changes that happen to the sperm inside the female reproductive tract that allows the sperm to become capable of fertilizing the egg is:
| 1. | spermiogenesis | 2. | the acrosomal reaction |
| 3. | capacitation | 4. | implantation |
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