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Growth hormone:

A.

Is stimulated by darkness

B.

Is stimulated by low levels of calcium

C.

Is secreted by the kidneys

D.

Stimulates growth

Answer and Explanation

The Correct Answer is D

A. Is stimulated by darkness: Melatonin is stimulated by darkness; GH may have a circadian rhythm but is not specifically triggered by darkness.

B. Is stimulated by low levels of calcium: Low calcium levels stimulate parathyroid hormone (PTH), not GH.

C. Is secreted by the kidneys: GH is secreted by the anterior pituitary, not the kidneys.

D. Stimulates growth: GH promotes growth of bones, muscles, and tissues.


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Related Questions

Correct Answer is D

Explanation

A. Ovum: The ovum is the female gamete, which is round and lacks a midpiece, head, or flagella.

B. Fallopian tubes: These are female reproductive structures, not cells.

C. Zygote: A zygote is the cell formed after fertilization, without a midpiece or flagella.

D. Sperm: A sperm cell has a head (with genetic material), midpiece (with mitochondria), and flagellum (tail for movement).


Correct Answer is D

Explanation

A. Ovaries: The ovaries produce ova and hormones but do not have these layers.

B. Fallopian tubes: These are passageways for eggs and do not have an endometrium or myometrium.

C. Vagina: The vagina has mucosal and muscular layers, but not a myometrium or endometrium.

D. Uterus: The endometrium (inner lining) and myometrium (muscular layer) are both parts of the uterus.


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