Muscle Physiology

Region where a motor neuron comes in close contact with a muscle cell.

• neurotransmitter
• muscular dystrophy
• muscle tension
• neuromuscular junction

The gap between a neuron and a muscle cell: (#4 in the diagram)

• synaptic cleft/synapse

• sarcolemma
• vesicle
• Ca²⁺ ion

Actin and myosin form the _______ of the muscle cell.

• ACh
• Sarcolemma
• Vesicle
• Myofibril

The organelle that stores neurotransmitter in the neuron/nerve

• Motor Neuron
• Axon Terminal of Motor Neuron
• Sarcolemma
•  Vesicle

The plasma membrane of a skeletal muscle cell is called the:

• sarcomere
• myofilament
• sarcolemma
• sarcoplasm

The sarcolemma helps to

• transmit muscle contraction

• transmit signal from neuromuscular junction

• covert energy

• produce electricity

Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.  

• Muscle cell
• Neuron
• Gland
• None of the above

What is a crossbridge?

• Where myosin binds to actin
• Where the calcium crosses into the cytoplasm
• Where calcium binds with troponin
• None of the answers are correct.

Which filament slides inward during muscle contraction

• Actin

• Myosin

One neuron and all the skeletal muscle cells it stimulates is the ____ ___.

• Neurotransmitter

• Neuromuscular junction

• Motor unit

• Synaptic cleft