Research indicates that exercise may improve cognition by stimulating the production of brain cells.
Answer the following statement true (T) or false (F)
True
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Which of the following statements about ultraviolet radiation is TRUE?
A. It's best to avoid outdoor activity in the late afternoon because the sun's rays are most intense after 3 p.m. B. Swimming is a good choice of outdoor activity because ultraviolet rays cannot penetrate water. C. Sand doesn't reflect ultraviolet radiation, so beach-goers need to wear sunscreen even if they sit under a beach umbrella. D. You need to wear sunscreen when outdoors at high elevations, because the atmosphere at high altitude filters out most ultraviolet radiation.
Scientists typically consider the results of a single study to be conclusive and definitive.
Answer the following statement true (T) or false (F)
Hearing a piercing scream late at night while walking on a campus path would likely trigger which phase of the general adaptation syndrome?
A) resistance B) exhaustion C) recovery D) alarm
Which of the following is TRUE about emergency contraceptive pills?
A) They will cause an abortion if the woman is already pregnant. B) Multiple brands are available over-the-counter with no age restrictions. C) All brands require a prescription and are subject to age restrictions. D) They are 100 percent effective if taken 2 to 5 days after unprotected intercourse.