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?
How can an animal regulate body temperature after damage to the POA/AH?
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?
Who would drink more pure water-someone with osmotic thirst or someone with hypovolemic thirst?
What genetic difference is most important for variants in likelihood of drinking milk in adulthood?
What evidence indicates that taste is not sufficient for satiety?
What evidence shows that stomach distension is sufficient for 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 the obese 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-1900s?
In one study, rats eating the less-caloric yogurt gained more weight than those eating the more-caloric type. What explanation was proposed?
What evidence from rats suggests that bulimia resembles an addiction?