LIFSCI 7C XL - Animation: The Knee- Jerk Reflex Questions and Answers Graded A+
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Course
LIFSCI 7C XL - Animation:
Institution
LIFSCI 7C XL - Animation:
LIFSCI 7C XL - Animation: The Knee-
Jerk Reflex Questions and Answers
Graded A+
What is the main function of the knee-jerk reflex in the body?
It provides a quick response to maintain balance and posture by contracting the quadriceps
muscle.
Which sensory receptor is primarily involved...
LIFSCI 7C XL - Animation: The Knee-
Jerk Reflex Questions and Answers
Graded A+
What is the main function of the knee-jerk reflex in the body?
✔✔ It provides a quick response to maintain balance and posture by contracting the quadriceps
muscle.
Which sensory receptor is primarily involved in detecting the stretch of the muscle during the
knee-jerk reflex?
✔✔ Muscle spindle fibers
What role does the motor neuron play in the knee-jerk reflex?
✔✔ It sends signals to the quadriceps muscle to contract after receiving input from the spinal
cord.
How does the knee-jerk reflex demonstrate the concept of a monosynaptic reflex arc?
✔✔ It involves only one synapse between the sensory neuron and the motor neuron, allowing for
a faster response.
1
, Why is the knee-jerk reflex used as a diagnostic tool in clinical settings?
✔✔ It helps assess the function of the nervous system, particularly the integrity of the spinal
cord and peripheral nerves.
What is the significance of the absence of a knee-jerk reflex in a patient?
✔✔ It could indicate potential damage to the sensory or motor pathways, or a problem with the
reflex arc itself.
How does the inhibitory interneuron function in the knee-jerk reflex?
✔✔ It inhibits the motor neurons that innervate the hamstring muscles, preventing them from
contracting during the reflex.
What part of the nervous system is responsible for processing the knee-jerk reflex?
✔✔ The spinal cord handles the reflex, allowing for a rapid response without involving the brain
directly.
Why is the knee-jerk reflex referred to as a stretch reflex?
✔✔ It is triggered by the stretching of the muscle spindle fibers within the quadriceps, causing
the muscle to contract in response.
2
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