The 'Hormone Thyroid Stimulating Hormone' (TSH) is secreted by the anterior pituitary. Its primary target organ and function are: MCQ with Answer and Explanation
The 'Hormone Thyroid Stimulating Hormone' (TSH) is secreted by the anterior pituitary. Its primary target organ and function are:
A. The adrenal cortex; stimulating cortisol release
B. The ovaries; stimulating ovulation
C. The kidneys; stimulating water reabsorption
D. The thyroid gland; stimulating the production and release of thyroid hormones (T3 and T4)
Answer: Option D
Solution (By JKExamLibrary)
Thyroid Stimulating Hormone (TSH), also known as thyrotropin, is a glycoprotein hormone secreted by the thyrotroph cells of the anterior pituitary gland. Its primary and specific target is the thyroid gland. TSH binds to receptors on the thyroid follicular cells, stimulating all aspects of their function: the uptake of iodine, the synthesis of the thyroid hormones thyroxine (T4) and triiodothyronine (T3), and the release of these hormones into the bloodstream. TSH secretion is regulated by Thyrotropin-Releasing Hormone (TRH) from the hypothalamus and by negative feedback from T3 and T4.
Explanation:
Malaria is transmitted by Anopheles mosquito; P. falciparum causes severe, often fatal malaria. Amoebic dysentery is Entamoeba, sleeping sickness Trypanosoma, giardiasis Giardia.
Explanation:
Pantothenic acid (vitamin B₅) is a component of coenzyme A (CoA), essential for the Krebs cycle and fatty acid metabolism. Thiamine is TPP, riboflavin FAD, biotin for carboxylation.
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