An older woman is gardening in the direct sun for three hours without any rest. she suddenly feels weak and dizzy before she faints. she is taken to an emergency room where the doctor suspects she is suffering from dehydration. this is a common problem in older people because:

1. body tissue that is connected to and moves the bones in the body hypertrophy 2. the ability of a muscle to move a weight repeatedly, or for an extended period of time tendon 3. the increase in the size of a muscle fiber in response to resistance training muscle strength 4. the most amount of weight a muscle can move at a single time skeletal muscles 5. the decrease in the size and strength of a skeletal muscle when it is not used atrophy 6. strong body tissue that connects the muscles to the bones muscle endurance