Spinal Muscular Atrophy | Mechanism & Presentation
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Science, Health Sciences, Social Studies, Biology
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University
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of an alpha motor neuron?
To initiate voluntary muscle contraction
To process visual information
To regulate involuntary muscle movements
To transmit sensory information to the brain
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to muscles if alpha motor neurons die?
They become more sensitive
They lose the ability to contract
They become stronger
They start to regenerate
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the SMN protein in alpha motor neurons?
It repairs damaged neurons
It enhances sensory perception
It allows the neurons to survive
It increases muscle strength
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key characteristic of spinal muscular atrophy progression?
It causes immediate neuron death
It progresses symmetrically
It affects distal muscles first
It primarily affects sensory neurons
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does spinal muscular atrophy differ from peripheral nerve diseases?
It causes sensory changes
It affects both motor and sensory neurons
It only affects sensory neurons
It only affects motor neurons
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which muscles are affected first in spinal muscular atrophy?
Cardiac muscles
Facial muscles
Proximal muscles
Distal muscles
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the genetic cause of spinal muscular atrophy?
Overproduction of SMN protein
Duplication of the SMN gene
Deletion of the SMN gene
Mutation in the sensory neurons
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