Human Reproduction

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?

1. Yolk sac
2. Amnion
3. Chorion
4. Allantois

Which part of ovary in mammals acts as an endocrine gland after ovulation?

1. Stroma
2. Vitelline membrane
3. Germinal epithelium
4. Graafian follicle

Sertoli cells are regulated by the pituitary hormone known as-

1. LH
2. FSH
3. GH
4. Prolactin

Withdrawal of which of the following hormones is the immediate cause of menstruation?

1. Progesterone
2. FSH
3. FSH-RH
4. Estrogen

Grey crescent is the area -

1. Just opposite to the site of entry of sperm into ovum
2. At the point of entry of sperm into ovum
3. At the vegetal pole
4. At the animal pole

If mammalian ovum fails to get fertilized, which one of the following is unlikely?

1. Corpus luteum will disintegrate
2. Estrogen secretion further decreases
3. Primary follicle starts developing
4. Progesterone secretion rapidly declines

Ovulation in the human female normally takes place during the menstrual cycle

1. At the beginning of the proliferative phase
2. At the mid secretory phase
3. Just before the end of the secretory cycle
4. At the end of the proliferative phase

Which of the following hormones is not a secretion product of human placenta?

1. Estrogen
2. Progesterone
3. Prolactin
4. Human chorionic gonadotropin

Bartholin's glands are situated

1. on the sides of the head of some amphibians
2. at the reduced tail end of birds
3. on either side of vagina in humans
4. on either side of vas deferens in humans.

During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called:

1. Organizer phenomena
2. Pattern formation
3. Axis formation
4. Anamorphosis