MICROANATOMY

URINARY SYSTEM AND MALE FEMALE REPRODUCTIVE SYSTEMS

FEMALE REPRODUCTIVE TRACT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Low level estrogen inhibit the release of FSH and LH by
A
Hypothalamus
B
Ovary
C
Anterior pituitary
D
Corpus luteum
Explanation: 

Detailed explanation-1: -Estrogen inhibits luteinizing hormone (LH), but not follicle-stimulating hormone secretion in hypophysectomized pituitary-grafted rats receiving pulsatile LH-releasing hormone infusions.

Detailed explanation-2: -As the follicle grows, blood levels of estrogen rise significantly by cycle day seven. This increase in estrogen begins to inhibit the secretion of FSH. The fall in FSH allows smaller follicles to die off.

Detailed explanation-3: -Cellular Level The hypothalamus produces GnRH, and it is released into the hypophyseal portal circulation to act on G-protein-coupled receptors at gonadotropic cells of the anterior pituitary. Those gonadotropic cells produce FSH and luteinizing hormone (LH) and release them into the peripheral circulation.

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