
Understanding Reflex Signs
Authored by abdulrahman almulhim
Other
12th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the dorsal root in muscle stretch reflexes?
The dorsal root inhibits sensory signals from the muscles.
The dorsal root connects muscles directly to the brain.
The dorsal root is responsible for motor control of the muscles.
The dorsal root transmits sensory information from muscle spindles to the spinal cord, initiating the muscle stretch reflex.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do lesions of the ventral root affect reflexes?
Lesions of the ventral root only affect voluntary movements.
Lesions of the ventral root result in diminished or absent reflexes.
Lesions of the ventral root have no effect on reflexes.
Lesions of the ventral root enhance reflexes.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define hyporeflexia and its possible causes.
Hyporeflexia is an increase in reflexes due to muscle overactivity.
Hyporeflexia is a condition that only affects the elderly population.
Hyporeflexia is caused solely by dehydration and lack of sleep.
Hyporeflexia is a condition of reduced reflexes, potentially caused by nerve damage, neurological disorders, or vitamin deficiencies.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is areflexia and how does it differ from hyporeflexia?
Areflexia is the absence of reflexes, while hyporeflexia is the reduced or diminished reflexes.
Areflexia is a temporary condition that resolves quickly.
Areflexia is a heightened reflex response.
Hyporeflexia means no reflexes at all.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which spinal root lesions would lead to hyporeflexia?
Lesions of the peripheral nerves.
Lesions of the ventral roots or spinal nerves.
Lesions of the brainstem.
Lesions of the dorsal roots or spinal nerves.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the afferent arc in the context of reflexes.
The afferent arc is the pathway that sensory information travels from receptors to the central nervous system in reflex actions.
The afferent arc transmits motor commands from the brain to muscles.
The afferent arc connects the spinal cord directly to the muscles.
The afferent arc is responsible for processing emotions in the brain.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to muscle reflexes when both dorsal and ventral roots are affected?
Muscle reflexes are enhanced.
Muscle reflexes remain unchanged.
Muscle reflexes are temporarily increased.
Muscle reflexes are lost.
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