Muscle Contractions Review

Front

Functional contractile unit of muscle fiber

Back

Sarcomere

Front

What structure connects the message from the brain to a muscle?

Back

Motor Neuron

Front

Identify Structure 'D'

Back

Tendon

Front

Identify Structure 'C'

Back

Epimysium

Front

What substance unblocks the actin?

Back

Calcium Ions

Front

What is the role of the sarcoplasmic reticulum in muscle contraction?

Back

It stores and releases calcium ions.

Front

Define the term 'actin'.

Back

A protein that forms the thin filaments in muscle fibers.

Front

What is the function of myosin in muscle contraction?

Back

Myosin interacts with actin to produce muscle contraction.

Front

Explain the sliding filament theory.

Back

The sliding filament theory describes how muscle fibers contract by the sliding of actin and myosin filaments past each other.

Front

What is the role of ATP in muscle contraction?

Back

ATP provides the energy required for muscle contraction and relaxation.