Question

multiple choice question 26.27
1 part -- of 1 point

what is the action of luteinizing hormone (lh)?

○ lh stimulates the secretion of interstitial-cell stimulating hormone (icsh).

○ lh stimulates the sustentacular cells of the testes to secrete androgen-binding protein (abp).

○ lh stimulates the secretion of inhibin.

○ lh stimulates interstitial cells of the testes to produce testosterone.

Explanation:

To determine the action of luteinizing hormone (LH), we analyze each option:

• Option 1: LH and ICSH are the same in males (LH is also called ICSH), so LH can't stimulate its own secretion. Eliminate this.
• Option 2: Follicle - stimulating hormone (FSH), not LH, stimulates sustentacular cells to secrete androgen - binding protein (ABP). Eliminate this.
• Option 3: Inhibin is secreted by sustentacular cells, and LH does not stimulate its secretion. Eliminate this.
• Option 4: In the male reproductive system, LH (also known as ICSH) acts on the interstitial cells (Leydig cells) of the testes and stimulates them to produce testosterone. This is the correct action of LH.

Answer:

D. LH stimulates interstitial cells of the testes to produce testosterone.