Which structure of the heart acts like an automatic door that closes once blood enters a chamber and forces it to exit in the proper direction a. atria b. valves c. arteries d. ventricles

Which term defines one's age as measured in years? chronological age biological age social age mental age

What is the style of discipline in which the teacher or parent establishes rules, monitors the child's behavior, then enforced rules by administering appropriate punishment

Select the correct answer. which is the safest and most effective way to get a deeper stretch? a. massage the muscles being stretched b. inhale and push the stretch until it hurts c. lean into the stretch as you exhale d. place ice on your muscles before stretching