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Questions and Answers
What is the main function of autonomic nerves in relation to involuntary muscles?
What is the main function of autonomic nerves in relation to involuntary muscles?
- Produce both excitatory and inhibitory effects (correct)
- Produce an inhibitory effect
- Have no effect on involuntary muscles
- Produce an excitatory effect
Which region of the brainstem is responsible for the 'fight or flight' aspect of the autonomic nervous system?
Which region of the brainstem is responsible for the 'fight or flight' aspect of the autonomic nervous system?
- Diencephalon
- Pons
- Medulla (correct)
- They all contribute equally
In motor unit anatomy, how many muscle fibers generally receive input from one motor neuron?
In motor unit anatomy, how many muscle fibers generally receive input from one motor neuron?
- More than 10
- 5-10
- Only 1 (correct)
- 2-3
What does a motor neuron pool consist of?
What does a motor neuron pool consist of?
Which step occurs first in the excitation process at the neuromuscular junction (NMJ)?
Which step occurs first in the excitation process at the neuromuscular junction (NMJ)?
How does the number of muscle fibers per motor neuron relate to a muscle's specific movement function?
How does the number of muscle fibers per motor neuron relate to a muscle's specific movement function?
What is one way to increase muscle force production through neuromuscular communication?
What is one way to increase muscle force production through neuromuscular communication?
How does repetitive stimuli affect muscle tension?
How does repetitive stimuli affect muscle tension?
Which factor affects the nerve's conduction velocity and, in turn, influences motor unit discharge frequency?
Which factor affects the nerve's conduction velocity and, in turn, influences motor unit discharge frequency?
What major factor distinguishes skilled from unskilled muscle performance according to the Size Principle of Motor Unit Recruitment?
What major factor distinguishes skilled from unskilled muscle performance according to the Size Principle of Motor Unit Recruitment?
What is one characteristic that can lead to selective recruitment of type II motor units in muscle actions?
What is one characteristic that can lead to selective recruitment of type II motor units in muscle actions?
What is one component that impacts voluntary muscle action during fatigue?
What is one component that impacts voluntary muscle action during fatigue?
What is the main purpose of endplate potentials spreading from motor endplate to extra-junctional sarcolemma of muscle?
What is the main purpose of endplate potentials spreading from motor endplate to extra-junctional sarcolemma of muscle?
How are motor units classified based on the muscle fibers they innervate?
How are motor units classified based on the muscle fibers they innervate?
What influences the muscle fiber type in a motor unit?
What influences the muscle fiber type in a motor unit?
According to the All-or-None Principle of Tension Generation, what happens when a stimulus triggers a motor neuron action potential?
According to the All-or-None Principle of Tension Generation, what happens when a stimulus triggers a motor neuron action potential?
How does the force of muscle action vary according to the text?
How does the force of muscle action vary according to the text?
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