Which statement is correct?
Correct answer: C. In females, FSH first binds with specific receptors on ovarian cell membrane
- A. Glucagon is secreted by the b-cells of islets of Langerhans and stimulates glycogenolysis.
- B. Secretion of thymosins is stimulated with aging
- C. In females, FSH first binds with specific receptors on ovarian cell membrane
- D. FSH stimulates the secretion of estrogen and progesterone.
Explanation
Hormone action involves their reception by target cells. Specific proteins called hormone receptors that are located in target tissues only bind with these hormones. Hormone receptor may be of two types: membrane-bound receptor and intracellular receptors. Steroid hormones etc., bind with intracellular receptors while some hormones e.g., pituitary hormones like FSH etc., bind with membrane-bound receptors.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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