Which is true statement about Anterior Pituitary Hormones?

A. Secretion of anterior pituitary hormones is pulsatile

B. No hormones are secreted before 28 weeks of gestation except prolactin

C. Most of the pituitary hormones are secreted by the posterior lobe

D. The hypophyseal portal veins are associated with the posterior lobe of the pituitary gland.

Correct Answer: Secretion of anterior pituitary hormones is pulsatile

Description: (A) Secretion of anterior pituitary hormones is pulsatile # Secretion of anterior & posterior pituitary hormones, adrenal glucocorticoids, mineralocorticoids and catecholamines, gonadal sex steroids, parathormone, insulin and glucagon is pulsatile (burst-like or episodic).> Neuronal inputs, cellular excitability and feedback with time delays constitute proximate mechanisms driving recurrent pulses.> Both the amplitude and frequency of gonadotropin, thyrotropin, prolactin and sex-steroid pulses determine their mean concentrations.> In contradistinction, primarily the amplitude of growth hormone, adrenocorticotropin, cortisol, parathormone and insulin pulses controls their average values.> Gonadotropin-releasing hormone and growth-hormone pulses convey unique signaling information to target tissues.

Category: Physiology

Share:

← Previous MCQ

Next MCQ →

Get More

Subject Mock Tests

Practice with over 200,000 questions from various medical subjects and improve your knowledge.

Attempt a mock test now

Mock Exam

Take an exam with 100 random questions selected from all subjects to test your knowledge.

Coming Soon

Get More

Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now

Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon