Answer:
D. A positive contraction
Explanation:
Isometric contraction occurs when muscle length remains relatively constant as tension is produced. So that is not the right answer.
A concentric contraction is a type of muscle contraction in which the muscles shorten while generating force. It is also called positive contraction.
<span>Oxygen moving from the bloodstream into a cell down a concentration gradient is a form of passive transport. This is because it is moving from a level of high concentration to an area of low concentration and because there is little energy being used which means passive.</span>
Answer:
breathe out and rest your muscles
Explanation:
learned it in health science class, also in fitness
