What Makes Muscles Grow

Approximately how many muscles are in the human body?

• Over 100

• Over 300

• Over 600

• Over 1000

What is the correct sequence of events for muscle movement?

• Motor neurons fire, brain sends signal, muscles contract, bones move.

• Brain sends signal, muscles contract, motor neurons fire, bones move.

• Brain sends signal, motor neurons fire, muscles contract, bones move.

• Muscles contract, brain sends signal, motor neurons fire, bones move.

What is the process called when muscle cells are exposed to higher workloads than they are used to, leading to new muscle growth?

• Muscular atrophy

• Eccentric contraction

• Hypertrophy

• Cytokine release

Besides activity, what three factors are crucial for muscle repair and growth?

• Water, carbohydrates, and sleep

• Nutrition, hormones, and rest

• Vitamins, minerals, and stretching

• Oxygen, blood flow, and hydration