Front

What are the two classifications of muscles in the human body?

Back

Involuntary and Voluntary

Front

List the events that occur at a neuromuscular junction in the correct order: 1. acetylcholine broken down 2. acetylcholine moves across the synaptic cleft 3. action potential reaches the terminal branch 4. acetylcholine combines with a receptor molecule on a skeletal muscle 5. action potential produced in skeletal muscle cell.

Back

3, 2, 4, 5, 1

Front

Which two systems work together to help a person stand erect?

Back

Skeletal and Muscular systems

Front

What is the chemical released by the nerve called?

Back

Neurotransmitter

Front

How many types of muscles are there in the human body?

Back

3

Front

What are the three types of muscles?

Back

Skeletal, Cardiac, and Smooth

Front

What is the primary function of skeletal muscles?

Back

To facilitate movement by contracting and pulling on bones.

Front

What role do neurotransmitters play in muscle contraction?

Back

They transmit signals from nerve cells to muscle cells, initiating contraction.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are under conscious control, while involuntary muscles operate automatically.

Front

What is the function of acetylcholine at the neuromuscular junction?

Back

It binds to receptors on muscle cells to trigger muscle contraction.