Question

1. A muscle cell has a membrane potential that is similar to the action potential. When the membrane potential reverses the
muscle fiber contracts, As in a neuron this is an all-or- none event. If this is all-or- none how are we able to make movements of
various sizes?

2. Compare the restoration theory of sleep and the evolution theory. Give an example of the evidence for each

3. Compare the set point concept with the settling point concept.

4. Why are so many humans overweight according to the doctor's life span charts (ideal weight for a particular height)? Give a

NATURAL SELECTION answer( based on genes and survival). What does the life span chart aim for, what does evolution aim
for?

5. Why doesn’t natural selection make us the ideal weight?(according to the life-span charts)

6. Compare the activational effects of estrogen on the sexual behavior in rat and human females.

7. What is the primary factor that would tend to make males(in general-not just humans) most promiscuous? (NOT that sperm is
plentiful, there are some species where males are relatively monogamous- ((birds))

8. It has been found that women are better than men at remembering locations of food at a farmers market. Does this prove that
the division of labor (women food gathering, men hunting) is an evolutionary adaption. What other explanations are possible.

Answer 1

Answer:
2.

Evolutionary theory describe that vital aim is for protection as sleeping phenomenon increase the chances of survival and security.
According to restoration theory, main purpose of sleeping behavior is to provide support and help to repair the damages in body occurred in day time.
Example for evolutionary theory of sleep: To avoid predators gazelles are agile and active hence they are active most of the time. Hence, sleep decreased amount of time.
On the other side carnivores sleep larger duration of time.
In restoration theory REM is necessary for the repair and healing processes of body.