Actin and Myosin are what? connective tissue layers, muscle cells, or protein myofilaments?
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Which term defines one's age as measured by how well the body is working? chronological age biological age social age mental age

The body uses fight or flight as a way of defending itself from stress. question 2 options: true false

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