1. What is denervation hypersensitivity?
- No voluntary or involuntary muscle contraction, no resting muscle tone and no active resistance to stretch
- Muscle wasting, loss of contractile protein
- Redistribution of ACh receptors away from motor end plates causing reactivity to ACh along the length of the muscle fibre
- Spontaneous twitching of motor units due to denervation hypersensitivity
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Other questions in this quiz
2. Through what mechanism is ACh released from the presynaptic membrane?
- Sodium-dependent endocytosis
- Calcium-dependent endocytosis
- Calcium-dependent exocytosis
- Sodium-dependent exocytosis
3. Select the structure which can be found most posterior in the spinal cord.
- Dorsal horn
- Central canal
- Ventral horn
- Lateral horn
4. What range of muscle fibres can one LMN innervate?
- 1-100 muscle fibres
- 10-1000 muscle fibres
- 1000-10000 muscle fibres
- 10-10000 muscle fibres
5. True or false: Very high frequencies of stimuli will result in tetanus (smooth contraction resulting in generation of maximum tension)?