Neuromuscular Junction Worksheet
Anatomy and physiology worksheet covering the structure and function of the neuromuscular junction for Grade 11 science students.
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Neuromuscular Junction Worksheet
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Date:
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Read each question carefully and answer to the best of your ability. Refer to your notes or textbook if needed.
The diagram below illustrates the structure of a neuromuscular junction. Label the indicated parts (A-E).
A.
B.
C.
D.
E.
1. Which neurotransmitter is primarily released at the neuromuscular junction?
Dopamine
Serotonin
Acetylcholine
GABA
2. What is the primary function of acetylcholinesterase at the neuromuscular junction?
To synthesize acetylcholine
To break down acetylcholine
To transport acetylcholine across the synaptic cleft
To bind to acetylcholine receptors
1. The space between the axon terminal and the muscle fiber is called the .
2. When an action potential arrives at the axon terminal, ions rush into the terminal.
1. The motor end plate is a specialized region of the neuron.
True
False
2. Depolarization of the sarcolemma leads to muscle contraction.
True
False
1. Describe the sequence of events that occurs from the arrival of an action potential at the axon terminal to the release of acetylcholine into the synaptic cleft.
2. Explain the role of calcium ions in muscle contraction at the neuromuscular junction.