1
Question
Which of the following is not involved in Knee-jerk reflex?
Which of the following is not involved in Knee-jerk reflex?
Open in App
Solution
The correct option is D Brain
Reflex action
A reflex action is an automatic and involuntary response of effectors, i.e. muscles and glands, to a stimulus, which is monitored through the spinal cord.
Reflex arc
Reflex arc is the pathway followed by the nerve impulses that produce a reflex.
It has five functional components:
● Sensory receptors
● Sensory neurons
● Integrating center
● Motor neuron
● Effector
Knee jerk reflex
The knee jerk reflex is a stretch reflex that involves extension of the leg at the knee joint by contraction of the quadriceps femoris muscle in response to tapping the patellar ligament. Since this is a reflex action, the brain is not involved in its pathway as the process is monitored through the spinal cord.
Final answer: Option (c)
Reflex action
A reflex action is an automatic and involuntary response of effectors, i.e. muscles and glands, to a stimulus, which is monitored through the spinal cord.
Reflex arc
Reflex arc is the pathway followed by the nerve impulses that produce a reflex.
It has five functional components:
● Sensory receptors
● Sensory neurons
● Integrating center
● Motor neuron
● Effector
Knee jerk reflex
The knee jerk reflex is a stretch reflex that involves extension of the leg at the knee joint by contraction of the quadriceps femoris muscle in response to tapping the patellar ligament. Since this is a reflex action, the brain is not involved in its pathway as the process is monitored through the spinal cord.
Final answer: Option (c)
Suggest Corrections
1
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
