Neuromuscular junction

The location where the motor neuron reaches the sarcolemma of the muscle fiber is the _____.

• Neurotransmitter

• Acetylcholine

• Synaptic cleft

• Neuromuscular Junction

What is the specific neurotransmitter that stimulates the muscle contraction?

• GABA

• Acetylcholine

• Serotonin

• Dopamine

What is the name of the structure that stores neurotransmitters?

• Synaptic cleft

• Acetylcholine

• Receptors

• Synaptic vesicles

What is acetylcholine?

• an ion pump on the postsynaptic membrane

• a source of energy for muscle contraction

• a component of thick myofilaments

• a neurotransmitter that stimulates skeletal muscle to contract

Click all that apply. Which of these make up a motor unit?

• Motor neuron

• Muscle Fibers

• Muscle

• Nerve

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

• sarcomere

• myofilament

• sarcolemma

• sarcoplasm

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

• Muscle cell

• Motor Neuron

• Gland

• None of the above

Contractile unit of a muscle.

• sarcomere
• motor unit
• fascicle
• myofibril

A bundle of muscle cells.

• sarcomere
• fiber
• fascicle
• Tendon

Another name for a muscle cell.

• Fiber
• Sacrolemma
• Sacromere
• Fascicle