24/25 Unit 3 Exam (fall final) review

Front

What is the state of the sarcomere when it is not contracted?

Back

Relaxed

Front

What are the three types of muscles in the human body?

Back

Skeletal, smooth, cardiac

Front

What is a motor unit?

Back

A single neuron and all the muscle fibers it stimulates.

Front

What zone/band of the sarcomere is represented by the pink color?

Back

A Zone/Band

Front

What is the state of the sarcomere when it is actively shortening?

Back

Contracting

Front

What is the primary function of skeletal muscle?

Back

To facilitate movement by contracting and pulling on bones.

Front

What type of muscle is involuntary and found in the walls of organs?

Back

Smooth muscle.

Front

What is the role of cardiac muscle?

Back

To pump blood throughout the body.

Front

What is the difference between a motor neuron and a motor unit?

Back

A motor neuron is a nerve cell that sends signals to muscles, while a motor unit includes the motor neuron and the muscle fibers it controls.

Front

What is the H Zone in a sarcomere?

Back

The region in the A band where there is no overlap between thick and thin filaments.