The hormone that stimulates the secretion of testosterone from Leydig cells is:
A. Inhibin
B. LH
C. FSH
D. GnRH
Answer: Option B
Solution (By JKSSB Mock Tests)
Luteinizing hormone (LH) binds to Leydig cells in the testes, stimulating testosterone production. FSH stimulates Sertoli cells for spermatogenesis. GnRH is hypothalamic.
Explanation:
Phototropism is the directional growth of a plant in response to light; shoots exhibit positive phototropism (grow towards light), roots negative. Auxin redistribution causes differential growth. Geotropism is gravity response, hydrotropism water, thigmotropism touch. Phototropism optimizes light capture for photosynthesis.
Explanation:
Epilepsy is a neurological disorder marked by recurrent seizures caused by excessive and synchronous neuronal firing. Stroke is from interrupted blood supply, MS is demyelination, meningitis is inflammation of meninges.
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