Question

8-11. Match the part of the menstrual cycle to its hormonal description:

          a)menstruation b)luteal phase c)follicular phase d)mid-cycle

8) Progesterone peaks                                                 9) LH peaks

10) Estrogen rises, but progesterone is absent           11) Both estrogen and progesterone fall to very low levels

12) The amount of water reabsorbed in the collecting ducts of kidney nephrons is regulated by the hormone

      a)ACTH b)ADH c)ANF d)aldosterone

Answer 1

8) Progesterone peaks - b.Luteal phase

The corpus luteum secretes large amounts of progesterone for the maintenance of endometrium.

9) LH peaks - d.Midcycle

LH attains a peak level in the middle of the cycle called LH surge.

10) Estrogen rises,but progesterone is absent - c.Follicular phase

During this phase secretion of estrogen from the growing follicles take place.

11) Both estrogen and progesterone fall to very low levels - a.Menstruation

Menstruation is characterized by the fall of Estrogen and progesterone levels.

12) The amount of water reabsorbed in the collecting ducts of kidney nephrons is regulated by the hormone - ADH

ADH plays an important role in the regulation of water reabsorption from the kidneys.It acts on the DCT of nephron and helps in the reabsorption of water.It is synthesized in the hypothalamus and released from the pituitary during conditions like high osmolality.