ls2homeostasis

What hormones are secreted by the posterior pituitary gland?

oxytocin and vasopressin / antidiuretic hormone
oxytocin
- Source: posterior pituitary
- Function: smooth muscle contraction; bonding between mother and baby
ADH
- Name: antidiuretic hormone or vasopressin
- Source: posterior pituitary
- Target: collecting ducts, blood vessels
- Function: water retention; vasoconstriction
What are the major nerves connecting the hypothalamus to the posterior pituitary?
- PVN (paraventricular nucleus): oxytocin secretion
- SON (supraoptic nucleus): vasopressin secretion
What are the three aspects of homeostasis?
- 1. receptors
- 2. control center
- 3. effectors
What is the control center for temperature homeostasis?

hypothalamus
What are the effectors for temperature homeostasis?

Cold: skeletal muscles (shivering), blood vessels (vasoconstriction)

Hot: sweat glands, blood vessels (vasodilation)
How does the graph of metabolic rate versus temperature differ for endotherms and ectotherms?
- Ectotherms: metabolism increases as temperature increases
- Endotherms: metabolism decreases, reaches a minimum, then increases as temperature increases

Author

Anonymous

10688

Card Set

ls2homeostasis

Description

Homeostasis for LS2

Updated

2010-03-15T23:34:16Z

Show Answers