What makes muscles grow?

What sends the message to your muscles to contract? 

• The motor neurons to your brain. 

• The brain to the spinal cord. 

• The brain to the motor neurons.

According to this video, which two body systems work together to help you move your muscles? 

• muscular and nervous

• muscular and integumentary

• muscular and endocrine

True or False: The microscopic damage that builds bigger muscles includes muscle tears and pulled muscles.

• True 

• False

If you don't use your muscles, they will get weaker and smaller, which is called: 

• muscular atrophy

• muscular hypertrophy

Why do we need to eat proteins to preserve muscle mass?

• Our muscles are mostly made of amino acids. 

• Our muscles are mostly made of carbs.

When does the muscle repair process primarily occur?

• during exercise.

• while watching tv on the couch.

• while resting, especially at night.