Leptin is a hormone involved in

a. appetite control. b. metabolism control. c. digestion of fatty foods. d. neurotransmissions.

The structure in the brain that, when damaged, causes rats to eat and eat and eat is called the

a. ventromedial pituitary. b. lateral hippocampus. c. ventromedial hypothalamus. d. lateral hypothalamus.

Plateau occurs in

a. Phase 1.                 c. Phase 3. b. Phase 2.                 d. Phase 4.

Studies indicate that women from are more likely to eat because their body tells them they are hungry. a. Hungary c. Italy b. the United States d.Japan

Unpredictable, large-scale events that create a great deal of stress and feelings of threat are called a. major life events. c. hassles. b. catastrophes. d. frustrations.

According to the arousal theory, people are typically motivated toward $\_\_\_\_\_\_\_\_\_\_\_$ point of arousal.

a. the highest b. the optimal c. the easiest d. the quickest

According to Maslow, what is the meaning of Peak Experience?

The Kinsey report indicates that more than $\_\_\_\_\_\_\_\_\_\_\_$ as many men had intercourse by age 16 as did women.

a. twice b. four times c. ten times d. three times

The level of weight the body tries to maintain is called the

a. basal metabolic rate. b. weight set point. c. basal set point. d. weight metabolic rate.

According to the arousal theory, people are typically motivated toward of arousal. a. the highest c. the easiest b. the optimal d. the quickest

Heroin mimics the actions of endorphins, inhibiting pain signals and creating a “high” feeling. Heroin is an example of a(n):

a. protagonist.

b. antagonist.

c. agonist.

d. glial cell.

During periods of stress, the brain signals the adrenal glands to produce this hormone that stimulates the sympathetic nervous system.

Thyroxine $\left(\mathrm{C}_{15} \mathrm{H}_{11} \mathrm{I}_4 \mathrm{NO}_4\right)$ is a hormone synthesized by the thyroid gland and used to control many metabolic functions in the body. A physiologist determines the mass percent of thyroxine in a thyroid extract by igniting 0.4332 g of extract with sodium carbonate, which converts the iodine to iodide. The iodide is dissolved in water, and bromine and hydrochloric acid are added, which convert the iodide to iodate.

(a) How many moles of iodate form per mole of thyroxine?

(b) Excess bromine is boiled off and more iodide is added, which reacts as shown in the following unbalanced equation:

$$\mathrm{IO}_3{ }^{-}(a q)+\mathrm{H}^{+}(a q)+\mathrm{I}^{-}(a q) \longrightarrow \mathrm{I}_2(a q)+\mathrm{H}_2 \mathrm{O}(l)$$

How many moles of iodine are produced per mole of thyroxine? (Hint: Be sure to balance the charges as well as the atoms.) What are the oxidizing and reducing agents in the reaction?

(c) The iodine reacts completely with $17.23 \mathrm{~mL}$ of $0.1000 \mathrm{M}$ thiosulfate as shown in the following unbalanced equation:

$$\mathrm{I}_2(a q)+\mathrm{S}_2 \mathrm{O}_3{ }^{2-}(a q) \longrightarrow \mathrm{I}^{-}(a q)+\mathrm{S}_4 \mathrm{O}_6{ }^{2-}(a q)$$

What is the mass percent of thyroxine in the thyroid extract?

Which of the following statements about insulin is true? a. Insulin acts as a transport protein, carrying glucose across the cell membrane. b. Insulin facilitates the movement of intracellular glucose transporters to the cell membrane. c. Insulin stimulates the breakdown of stored glycogen into glucose. d. Insulin stimulates the kidneys to reabsorb glucose into the bloodstream.