Which of the following substances is released from the intestines, causes eating to cease, and shows promise in the treatment of obesity?

Are there any differences in health between people who have solid social support and people who don't?

a. No—psychologists suspect that there are differences, but research has not consistently found any evidence that social support makes a real difference. b. Yes—although social support does not appear to improve people's physical health, it does improve their mood and general psychological well-being. c. Yes—social support appears to improve physical and psychological well-being, though it does not improve objective measures of health (e.g., recovery time from illness). d. Yes—social support has been tied to better health, more rapid recovery from illness, and a lower risk for mortality.

What is one of the main symptoms of Parkinson's disease?

a. rapid fatigue of the muscles b. loss of saccadic eye movements c. difficulty initiating movements d. inability to coordinate speech with movements