Adults need at least 1 hour and 30 minutes of vigorous-intensity aerobic activity per week for important health benefits.

true
false

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.

How is health different for most people in this country today from what it was for people born in 1900? a. people have a shorter life span. b. people today work harder to survive. c. people today live in poorer sanitary conditions. d. people today can focus less on day-to-day survival and more quality of life.

How does social isolation affect teens?