According to the talk-test method of measuring exercise intensity, a person who is engaging in vigorous physical activity should be
a. able to talk during the activity.
b. able to sing during the activity.
c. unable to hear others talk during the activity.
d. unable to talk during the activity.

Andrew loves to go camping and hiking in the fall. about two weeks after his last camping trip, he noticed an expanding red, target shaped, rash on his arm. to avoid this illness, andrew should have select one: a. boiled his water before drinking. b. avoided contact with ticks. c. avoided contact with fleas found on mice. d. camped only in the spring.

What are the symptoms of diabetes? what are the different types of diabetes?

Explain why hiv is a life-threatening sti.