16 Questions
What is the primary function of alpha motor neurons in muscle innervation?
To cause force generation by muscle
What type of reflex is involved in withdrawing a limb from a painful stimulus?
Flexor reflex
Which type of neuron is responsible for transmitting proprioceptive feedback from the muscle spindle?
Ia axons
What is the primary function of the crossed-extensor reflex?
To compensate for the extra load caused by limb withdrawal
What is the role of gamma motor neurons in muscle innervation?
To regulate muscle spindle sensitivity
Which type of neuron is responsible for transmitting signals from the central nervous system to lower motor neurons?
Upper motor neurons
What is the main function of the ventral horn in the spinal cord?
To integrate motor signals from the brain to the muscle
Which type of muscle fiber is innervated by alpha motor neurons?
Extrafusal muscle fibers
What is the term for the group of muscle fibers innervated by a single alpha motor neuron?
Motor unit
How do alpha motor neurons increase muscle contraction?
By recruiting more motor units
What is the function of gamma motor neurons?
To innervate intrafusal muscle fibers
Which type of proprioceptor measures muscle tension?
Golgi tendon organ
What is the name of the reflex that occurs when a muscle is stretched and contracts?
Myotatic reflex
Which type of motor neuron is responsible for voluntary muscle movement?
Alpha motor neuron
What is the term for the distribution of lower motor neurons in the spinal cord?
Spinal segments
What is the name of the synapse between the alpha motor neuron and the muscle fiber?
Neuromuscular junction
Test your knowledge of the peripheral motor system, including skeletal muscle fibers, motor neurons, spinal cord, proprioceptors, and reflexes.
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