To increase the amount of fibers in a muscle, you need to exercise at low intensity for increasingly longer periods of time.

1. controls how much sugar is in the blood pancreas 2. controls the other glands pituitary gland 3. manufactured by the brain to relieve pain thyroid 4. gland that regulates the body's energy levels endorphins

Drag the tiles to the correct boxes to complete the pairs. match the academic requirements with the careers.

Cardiac output is affected by heart rate exercise stroke volume all of the above