Muscle System Review

Front

What is the basic contractile unit of a muscle fiber?

Back

Sarcomere

Front

What type of muscle tissue is involuntary and has striations?

Back

Cardiac muscle

Front

What is the primary function of skeletal muscle?

Back

To facilitate movement of the skeleton and maintain posture.

Front

What is the scientific term for a muscle fiber bundle?

Back

Fascicle

Front

Which type of muscle tissue is responsible for voluntary movements?

Back

Skeletal muscle

Front

What is the role of myofibrils in muscle contraction?

Back

Myofibrils contain the sarcomeres, which contract to shorten the muscle.

Front

What is the difference between smooth muscle and skeletal muscle?

Back

Smooth muscle is involuntary and lacks striations, while skeletal muscle is voluntary and has striations.

Front

What is the function of the neuromuscular junction?

Back

It is the site where a motor neuron communicates with a muscle fiber to initiate contraction.

Front

What is the role of calcium ions in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin.

Front

What is the term for the muscle's ability to respond to stimuli?

Back

Excitability