Exercise is a type of physical activity that's planned, repetitive and has a purpose. Physical Activity could be anything that involves movement.
Answer:
Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.
The correct answer is enzyme linked receptor. It is also known as a catalytic receptor and <span>is a transmembrane <span>receptor.</span></span>
The correct answer is B. Muscle cramps, fatigue, and lightheadedness
