Muscular System Pre-Assessment

The thick filament is composed of: 

• Myosin
• Actin

The thin filament is composed of: 

• Myosin
• Actin

Involuntary

• skeletal
• cardiac
• smooth
• smooth and cardiac

The gap between the nerve cell and sarcolemma is the ____ ___.

• Synaptic cleft

• Neurotransmitter

• Motor unit

• Neuromuscular junction

What is the specific neurotransmitter that stimulates the movement of skeletal muscles?

• GABA

• Acetylcholine

• Serotonin

• Dopamine

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

• neurotransmitter
• muscular dystrophy
• muscle tension
• neuromuscular junction

What happens at the neuromuscular junction?

• A sensory neuron communicates with a motor neuron

• An action potential jumps from the muscle to the neuron

• A nerve signal traveling down a motor neuron can jump over to the muscle cell

• Muscle cells contract in response to a sensory neuron

Skeletal muscles are voluntary.

• true

• false

The epimysium covers

• the entire muscle

• the fascicle

• the muscle fiber

• the myofibril

Which connective tissue surrounds the fascicle?

• epimysium

• perimysium

• sarcolemma

• endomysium