Hormones

Question 1

What are hypothalamic neurohormones secreted by?

Answer 1

Posterior pit gland

Question 2

What do hypothalamic released hormones stimulate?

Answer 2

Hormone release from the anterior pit gland

Question 3

ADH

Answer 3

o ADH released by the supraoptic region of the hypothalamus into the post. pit
• Respond to thirst and water regulation
• High body fluids osmolarity released ADH
• Stimulates kidney to release water
• Also increases blood pressure

Question 4

what is the role of oxytocin?

Answer 4

o Oxytocin responds to suckling baby
• Oxytocin reaches mammary glands and triggers milk secretion
• During childbirth, triggers uterine contraction via positive feedback
released by the supraoptic region into the post. pit

Question 5

What are the hormones of the ANTERIOR pit gland?

Answer 5

•	Hormones of the anterior pit gland
o	Glycoproteins
•	Thyroid-stimulating hormones (TSH)
•	Pituitary gonadotropins
	Follicle-stimulating hormones (FSH)
	Lutenizing hormone (LH)
o	Proteins
•	Growth hormone (GH)
•	Prolactin (PRL)
•	Adrenocorticotropic hormone (ACTH)
•	Endorphins

Question 6

What are the hypothalamic hypophysiotropic hormones?

Answer 6

•	Corticotropin-releasing hormone
	Stimulates synthesis of ACTH
•	Growth hormone releasing hormone
	Stimulates release of growth hormone
•	GH-inhibiting hormone (GHIH; somatostatin reverse effects)
	Inhibits release of GH and other hormones 
•	Gonadotropin-releasing hormone GnRH
	Release FSH and LH 
•	Thyrotopin-releasing Hormone
	A tripeptide that releases TSH and PRL
•	Dopamine
	Biogenic amine that inhibits the release of PRL

Question 7

Where are hypothalamic neurohormones secreted?

Answer 7

Posterior pit gland

Question 8

What is positive feedback?

Answer 8

A type of feedback that pushes levels out of normal range (supraphysiological response)

Question 9

What stimulates the release of GH?

Answer 9

Ghrelin, fasting, and vigorous exercise;

Question 10

When is GH secreted most?

Answer 10

During the first hour of sleep’ also secreted in a pulsatile manner with hypothalamic stimulation

Question 11

What are inhibitors of GH?

Answer 11

GHIH, hyperglycemia, and glucocorticoids form the adrenal cortex