20.9–20.13
20.9–How does homeostasis work?
For animals to maintain homeostasis with regard to a particular physiological variable, that variable must have a set point to which the organism can return.
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Q
It is not necessarily accurate to refer to endotherms as “warm-
- a) some endotherms allow their body temperature to drop significantly during hibernation.
- b) on average, their body temperature is colder than that of “cold-
blooded” animals. - c) they generate their heat primarily within their own bodies.
- d) most do not actually have blood in their bodies.
- e) some are homeotherms rather than heterotherms.
The glomerulus is _______ that is/are a key component of the filtration process in the nephron.
- a) a system of ducts
- b) a renal tubule
- c) a layer of connective tissue
- d) the terminal end of the nephron
- e) a bed of capillaries
In homeostasis terms, a fever is classified as:
- a) a rise in internal temperature in response to foreign invaders.
- b) a sudden drop in internal temperature.
- c) a crazed reaction toward some object.
- d) any general rise in internal temperature.
- e) All of the above are correct.
