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Which hormone shows the highest peak during the luteal phase?

A.

Progesterone

B.

LH

C.

FSH

D.

Estrogen

Answer and Explanation

The Correct Answer is A

A. Progesterone: During the luteal phase, the corpus luteum produces the highest levels of progesterone, which is crucial for preparing the uterine lining for potential implantation.

B. LH: Luteinizing hormone (LH) peaks just before ovulation, not during the luteal phase.

C. FSH: Follicle-stimulating hormone (FSH) is primarily active during the follicular phase and has lower levels during the luteal phase.

D. Estrogen: While estrogen levels do rise during the luteal phase, they do not peak as high as progesterone does.


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Related Questions

Correct Answer is A

Explanation

A. Proximal convoluted tubule: The proximal convoluted tubule is the main site of creatinine secretion as well as the reabsorption of nutrients and water.

B. Distal convoluted tubule: While secretion occurs here, it is not the main site for creatinine; this site mainly adjusts the final urine concentration.

C. Collecting duct: This part primarily deals with water and electrolyte balance but is not the main site for creatinine secretion.

D. Loop of Henle: This structure plays a key role in water and sodium balance but does not play a significant role in creatinine secretion.

Correct Answer is D

Explanation

A. Eosinophil: Eosinophils are involved in allergic reactions and parasitic infections, but they are not responsible for B and T cell functions.

B. Basophil: Basophils are involved in inflammatory responses, particularly releasing histamine, but do not include B or T cells.

C. Monocyte: Monocytes are large white blood cells that develop into macrophages but do not include B or T cells.

D. Lymphocyte: Lymphocytes are a subtype of white blood cells that include B cells (which produce antibodies) and T cells (which are involved in cell-mediated immunity), making this the correct answer.

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