Which statement best describes the effects that stress has on the immune system? a. stress can lead to increased vulnerability to infections and immune deficiency disorders. b. stress can lead to decreased infections and immune deficiency disorders. c. stress can inhibit the production of red blood cells and platelets. d. stress can decrease the likelihood of catching colds, flu, and pneumonia.

Describe specific ways your friend can use frequency, intensity, time, and type to safely apply the overload principles to his workout schedule. provide two ways per training principle. sunday30-minute bike ride monday20 push-ups, 10 squats, and 20-minute jog tuesday30-minute bike ride wednesdayrest thursday20 push-ups, 10 squats, 25 curl-ups, and 20-minute jog friday30-minute bike ride saturdayone-hour walk

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.

An _ exposure is a repeated or prolonged exposure(over months or years) that may bring about slowly developing symptoms.