1. What is denervation hypersensitivity?
- Spontaneous twitching of motor units due to denervation hypersensitivity
- Redistribution of ACh receptors away from motor end plates causing reactivity to ACh along the length of the muscle fibre
- Muscle wasting, loss of contractile protein
- No voluntary or involuntary muscle contraction, no resting muscle tone and no active resistance to stretch
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Other questions in this quiz
2. Where are the greatest potentials recorded?
- At the NMJ
- At the pre-synaptic terminal
- At the end of the muscle fibre (furthest from the NMJ)
- In the middle of the muscle fibre
3. Which two substances join to form ACh?
- Acetyl CoA & Choline
- Acetic Acid & CoA
- Acetic Acid & Cholinesterase
- Acetyl CoA & Citric Acid
4. At the NMJ there are multiple terminal boutons. What is a terminal boutons?
- The LMN
- The site of neurotransmitter release
- The whole motor end plate
- The vesicles that hold the neurotransmitter in the pre-synaptic membrane
5. True or false: An action potential in the motor neuron will always result in a muscle contraction?