Endocrine System

Question 1

aldosterone

Answer 1

• produced by adrenal cortex
• stimulates reabsorption of Na+ from the collecting duct (takes water with it)
• stimulates secretion of K+
• causes an increase in blood pressure and blood volume
• causes production of more concentrated urine
• release is stimulated by angiotensin II, which is formed as a result of renin

Question 2

ADH (anti-diuretic hormone) (vasopressin)

Answer 2

• produced by the hypothalamus
• stored in the anterior pituitary
• increases permeability of the collecting duct
• promotes reabsorption of water
• increases blood volume
• decreases blood osmolarity

Question 3

oxytocin

Answer 3

• produced by hypothalamus
• stored in posterior pituitary
• secreted during childbirth to increase the strength and frequency of uterine muscle contractions
• release represents a positive feedback mechanism

Question 4

epinephrine

Answer 4

• produced by the adrenal medulla
• peptide hormone
• release is stimulated by the sympathetic nervous system
• causes bronchial dilation
• conversion of glycogen to glucose in liver and muscle tissue
• inhibits “vegetative” functions (digestion)
• neurotransmitter
• increase heart beat and basal metabolic rate

Question 5

PTH (parathyroid hormone)

Answer 5

• produces by parathyroid

- promotes the release of calcium from the bones into the blood stream done by osteoclasts