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Question

Yellow corpus luteum occurs in mammals in

A
Heart to initiate heart beat.
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B
Skin to function as pain receptor.
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C
Brain and connects cerebral hemispheres.
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D
Ovary for secretion of progesterone.
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Solution

The correct option is D Ovary for secretion of progesterone.
Maturation of the follicle is stimulated by follicle stimulating hormone (FSH) from the anterior pituitary, and oestrogen secreted by the follicle lining cells. Ovulation is triggered by a surge of luteinising hormone (LH) from the anterior pituitary, which occurs a few hours before ovulation. After ovulation, the follicle lining cells develop into the corpus luteum (yellow body), under the influence of LH from the anterior pituitary. The corpus luteum produces the hormone progesterone and some oestrogen. If the ovum is fertilised it embeds itself in the wall of the uterus where it grows and develops and produces the hormone human chorionic gonadotrophin (hCG), which stimulates the corpus luteum to continue secreting progesterone and oestrogen for the first 3 months of the pregnancy and, after which time this function is continued by the placenta.

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