SCIENCE
ENDOCRINE GLANDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1 and 2 are correct
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2 and 3 are correct
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1 and 3 are correct
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2 and 4 are correct
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Detailed explanation-1: -follicle-stimulating hormone (LH), stimulates development of the graafian follicle, a small, egg-containing vesicle in the ovary of the female mammal; in the male, it promotes the development of the tubules of the testes and the differentiation of sperm.
Detailed explanation-2: -Rapid secretion of Leutinizing hormone (LH) results in a hormone surge, causing the Graafian follicle to break. This break releases the ovum, resulting in ovulation.
Detailed explanation-3: -The rise in estrogen causes the uterine endometrium to proliferate (thicken) during the follicular phase. Thus, with reference to the uterus, this phase of the menstrual cycle is often called the proliferative phase. Under estrogenic influence, uterine glands begin to enlarge (Fig. 3-2).
Detailed explanation-4: -A negative feedback system occurs in the male with rising levels of testosterone acting on the hypothalamus and anterior pituitary to inhibit the release of GnRH, FSH, and LH. The Sertoli cells produce the hormone inhibin, which is released into the blood when the sperm count is too high.