Functions Of Ovaries: From Oogenesis To Hormone Secretion

Functions Of Ovaries: From Oogenesis To Hormone Secretion

Question 1. Ovarian hormones. (or) Corpus Iuteum. (or) Ovulation.
Answer:

Question 2. Functions of ovaries.
Answer:

1. Oogenesis and menstrual cycle.

• Production of matured ova and their release into the peritoneal cavity.

2. Secretion of femal sex hormones

• Ovaries secretes various hormones like
  1. Estrogen- enlarges uterus
  2. Progesterone – prepares endometrium for implantation
  3. Androgen-secreted only in traces.
  4. Inhibin inhibits FSH secretion.
  5. Relaxin helps in labor.

Question 3. Progesterone.
Answer:

• It is a C₂₁steroid.
• It is secreted by ovaries during follicular stage of menstrual cycle.
• It is degraded in liver and excreted in urine.

Question 4. Functions of placenta.
Answer:

1. Nutritive function.

• Supplies nutritive substances to fetus from maternal’s blood.

2. Excretory function.

• Excrete metabolic waste products of fetus via maternal blood.

3. Respiratory function.

• It acts as respiratory organ for fetus.

4. Endocrine function.

• It secretes following hormones.
  1. Human chorionic gonadotrophin (HCG)
  2. Human chorionic somatommamotrophin (HCS)
  3. Estrogen
  4. Progesterone
  5. Relaxin