Neuromuscular Junctions (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What two structures meet at a neuromuscular junction?
What two structures meet at a neuromuscular junction?
Motor neurone and skeletal muscle
Why are multiple neuromuscular junctions needed across each muscle?
Why are multiple neuromuscular junctions needed across each muscle?
To ensure rapid, powerful contraction
What is a motor unit?
What is a motor unit?
Muscle fibres supplied by one neurone
How many motor units are activated during light movements?
How many motor units are activated during light movements?
Only a few
Which neurotransmitter is stored in synaptic vesicles at neuromuscular junctions?
Which neurotransmitter is stored in synaptic vesicles at neuromuscular junctions?
Acetylcholine
Why are mitochondria present in the axon terminal?
Why are mitochondria present in the axon terminal?
To provide energy for transmission
What is the role of acetylcholinesterase at neuromuscular junctions?
What is the role of acetylcholinesterase at neuromuscular junctions?
Breaks down acetylcholine
Which ion rapidly enters the muscle when acetylcholine binds to receptors?
Which ion rapidly enters the muscle when acetylcholine binds to receptors?
What type of effect do neuromuscular junctions always have?
What type of effect do neuromuscular junctions always have?
Only excitatory
What does a neuromuscular junction represent in the neural pathway?
What does a neuromuscular junction represent in the neural pathway?
End of the neural pathway