Front

What is the main function of the muscular system?

Back

The main function of the muscular system is to facilitate movement of the body, maintain posture, and produce heat.

Front

What are the three types of muscle tissue?

Back

The three types of muscle tissue are skeletal, cardiac, and smooth.

Front

What type of muscle is under voluntary control?

Back

Skeletal muscle is under voluntary control.

Front

What is the role of cardiac muscle?

Back

Cardiac muscle is responsible for pumping blood throughout the body and is found only in the heart.

Front

What is the primary function of smooth muscle?

Back

Smooth muscle controls involuntary movements in hollow organs, such as the intestines and blood vessels.

Front

What is a sarcomere?

Back

A sarcomere is the basic functional unit of a muscle fiber, consisting of actin and myosin filaments.

Front

What happens to the I band during muscle contraction?

Back

The I band shortens during muscle contraction.

Front

What is the role of myosin in muscle contraction?

Back

Myosin is a thick filament that interacts with actin to produce muscle contraction.

Front

What is the resting membrane potential?

Back

The resting membrane potential is the electrical charge difference across the plasma membrane of a resting neuron or muscle cell.

Front

What is the A band in a sarcomere?

Back

The A band is the region of the sarcomere that contains the thick myosin filaments and does not change length during contraction.