In humans, at the end of the first meiotic division, the male germ cells differentiate into
the
1. primary spermatocytes
2. secondary spermatocytes
3. spermatids
4. spermatogonia
Which extra embryonic membrane in humans prevents desiccation of the embryo inside
the uterus ?
1. Chorion
2. Allantois
3. Yolk sac
4. Amnion
Which one of the following statement is incorrect about menstruation?
1. During normal menstruation about 40 mL blood is lost
2. The menstrual fluid can easily clot
3. At menopause in the female, there is especially abrupt increase in gonadotropic
hormones
4. The beginning of the cycle of menstruation is called menarche
Which part of ovary in mammals acts as an endocrine gland after ovulation?
1. Graafian follicle
2. Stroma
3. Germinal epithelium
4. Vitelline membrane
In the human female, menstruation can be deferred by the administration of:
1. LH only
2. Combination of FSH and LH
3. Combination of estrogen and progesterone
4. FSH only
Withdrawal of which of the following hormones is the immediate cause of menstruation ?
1. Estrogen
2. FSH
3. FSH-RH
4. Progesterone
Cleavage differs from mitosis in lacking
1. synthetic phase
2. growth phase
3. both 1. and 2.
4. all of these
Low levels of LH during the secretory phase of the menstrual cycle are primarily due to
1. high estrogen level
2. inhibin
3. high progesterone level
4. high estrogen and progesterone level.
An oocyte is released from the ovary under the influence of LH
1. After completing meiosis and before polar body are released
2. After completing meiosis I and before release of polar body
3. After completing meiosis
4. After completing meiosis I and after release of polar body
Both corpus luteum and macula lutea are
1. found in human ovaries
2. a source of hormones
3. characterized by a yellow colour
4. contributory in maintaining pregnancy.