Muscular System Practice

What are the three types of muscles?

• skeletal muscles, smooth muscles, and cardiac muscles

• biceps muscles, triceps muscles, and quadriceps muscles

• voluntary muscles, involuntary muscles, and respiratory muscles

• flexor muscles, extensor muscles, and oblique muscles

Which type of muscle is responsible for voluntary movements?

• Smooth muscles

• Skeletal muscles

• Adipose tissues

• Cardiac muscles

Which type of muscle is found in the walls of hollow organs?

• striated muscle

• smooth muscle

• skeletal muscle

• cardiac muscle

What are the main functions of muscles?

• The main functions of muscles are producing sound, vision, and taste.

• The main functions of muscles are thinking, feeling, and sensing.

• The main functions of muscles are movement, stability, and posture.

• The main functions of muscles are digestion, respiration, and circulation.

Which muscle type is striated and multinucleated?

• skeletal muscle

• cardiac muscle

• adipose tissue

• smooth muscle

What is the basic unit of muscle structure?

• Nucleus

• Mitochondria

• Golgi Apparatus

• Sarcomere

What is the process called when a muscle shortens and generates force?

• muscle contraction

• muscle extension

• muscle expansion

• muscle relaxation

Which protein is responsible for muscle contraction?

• keratin and collagen

• hemoglobin and myoglobin

• insulin and glucagon

• actin and myosin

What is the role of calcium ions in muscle contraction?

• Calcium ions inhibit the binding of troponin to actin, preventing muscle contraction.

• Calcium ions bind to troponin, causing a conformational change that moves tropomyosin away from the myosin-binding sites on actin.

• Calcium ions directly bind to myosin, causing muscle contraction.

• Calcium ions have no role in muscle contraction.

What is the name of the neurotransmitter that stimulates muscle contraction?

• Acetylcholine

• Serotonin

• Dopamine

• GABA