What is the definition of a resting heart rate?
-the number of times the heart beats in 1 minute when not active
-the number of times the heart beats while doing an aerobic activity after a period of
rest
-the number of times the heart beats in 1 minute while sleeping
-the number of times the heart beats in relation to blood pressure

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.

Which of these is a controllable risk fator for disease

What is the only part of your body called that should touch the ball when setting in volleyball?