Chapter Questions
How does the idea of allostasis differ from homeostasis?
What is the primary advantage of maintaining a constant high body temperature?
Why did mammals evolve a temperature of $37^{\circ} \mathrm{C}\left(98^{\circ} \mathrm{F}\right)$ instead of some other temperature?
What are the sources of input to the POA/AH?
If you had damage to your POA/AH, what would happen to your body temperature?
What evidence indicates that fever is an adaptation to fight illness?
If you lacked vasopressin, would you drink like a beaver or like a gerbil? Why?
Would adding salt to the body's extracellular fluids increase or decrease osmotic thirst?
Why are you likely to feel thirst just before bedtime? Would you feel just as thirsty if you went to sleep at an unusual time?
Who would drink more pure water-someone with osmotic thirst or someone with hypovolemic thirst?
What are the contributions of angiotensin II and aldosterone?
Why do most Southeast Asian adults avoid drinking much milk?
What evidence shows that stomach distension is sufficientfor satiety?
What are two mechanisms by which CCK increases satiety?
Why do people with very low insulin levels eat so much? Why do people with constantly high levels eat so much?
What would happen to someone's appetite if insulin levels and glucagon levels were both high?
Why are leptin injections less helpful for most overweight people than for mice with a mutation in the leptin gene?
Name three hormones that increase satiety and one that increases hunger.
Which neuropeptide from the arcuate nucleus to the paraventricular nucleus is most important for satiety?
In what ways does the lateral hypothalamus facilitate feeding?
In what way does eating increase after damage in and around the ventromedial hypothalamus? After damage to the paraventricular nucleus?
Why did the Pima begin gaining weight in the mid- 1900 s?
For someone who is trying to lose weight, why would it be a good idea to cut down on sweets altogether?
What evidence from rats suggests that bulimia resembles an addiction?
If rats are limited to eating for one hour a day, what determines whether or not they will lose weight?