Muscle Contraction Process

What does a motor unit contain?

• motor neuron

• motor neuron and muscle

• muscle

• a car

The (a)   is the space between the muscle fiber and its axonal terminal.

What is the neurotransmitter for muscle contractions?

• Acetylcholine (Ach)

• Seratonin

• Histamine

• Dopamine

What is a neuro-muscular junction?

• one axonal terminal and its muscle fiber

• a joint

• the combining of muscles

• a neuron

What triggers the muscle to start contracting?

• Ach

• the neurotransmitter

• your hand

• the sarcomere

The neurotransmitter crosses the synaptic cleft to bind to a receptor where?

• the chain

• the the epimysium

• the neuron

• the sarcolemma

Depolarization happens when ____ flood into the ____.

(a)  

In depolarization, what is released from the sarcoplasmic reticulum?

• Hydrogen

• Sodium

• Calcium

• Energy

Calcium bonds to the _____/____.

(a)  

What are the regulatory proteins in the sarcomere?

• Troponin

• Amino Acids

• Tropomyosin

• Enzymes