Muscle Basics Quiz

What types of muscles are there in the human body?

• Cardiac, smooth, and skeletal
• Fast twitch and slow twitch
• Flexor and extensor
• Voluntary and involuntary

Which type of muscle can we consciously control?

• Cardiac muscle
• Smooth muscle
• Skeletal muscle
• All of the above

How many skeletal muscles are there in the human body?

• 100
• 400
• 640
• 1000

What are the two main types of skeletal muscle fibers?

• Fast twitch and slow twitch
• Flexor and extensor
• Type I and Type II
• Contractile and non-contractile

What process must occur for skeletal muscle growth to take place?

• Muscle breakdown and rebuilding
• Muscle contraction and relaxation
• Muscle protein synthesis
• Increased blood flow

Why is protein important for muscle growth?

• Proteins provide energy
• Proteins build new muscle cells
• Proteins regulate hormone levels
• Proteins strengthen bones

What is the name of the two main filaments responsible for muscle contraction?

• Actin and myosin
• Tropomyosin and troponin
• Sarcomere and titin
• Sarcoplasmic reticulum and transverse tubules

How do the myosin filaments generate force to pull the actin filaments?

• By changing shape and bending
• By increasing in length
• By increasing in thickness
• By rotating around the actin filaments

What is the name of the basic contractile unit of skeletal muscle?

• Sarcomere
• Myofibril
• Muscle cell
• Motor unit

Which muscle fibers are better suited for short, powerful bursts of activity?

• Slow twitch
• Fast twitch
• Hybrid fibers
• Cardiac muscle fibers