Which of the following findings led to the conclusion that schizophrenia may be caused by dopamine activity?
a) drugs that relieve schizophrenic symptoms have side effects similar to parkinson's disease.
b) parkinson's disease is known to be caused by excess levels of dopamine.
c) people with parkinson's disease are more likely to develop schizophrenia.
d) all of the above are correct findings.

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

Can someone give me a hand with this one.

In a paragraph describe the function the stomach serves in the digestive system