NEET-UG Biology · Class 11
Reflex action and the reflex arc — NEET & JEE Questions
Reflex action and the reflex arc is a topic in Neural Control and Coordination, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 14 published NEET-UG questions on Reflex action and the reflex arc, each with the marking scheme of the real paper. The ideas it examines include Order of parts in a reflex arc, Why a reflex is faster than thinking.
- questions
- 14
- shown here
- 10
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Key formulas and concepts
The ideas Reflex action and the reflex arc is examined on, as they are tagged in the syllabus tree.
- Order of parts in a reflex arc
- Why a reflex is faster than thinking
Reflex action and the reflex arc MCQs with solutions
10 of the 14 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
The neural pathway mediating a reflex:
- A. endocrine axis
- B. motor unit only
- C. portal system
- D. reflex arc
What is a reflex action?
- A. A slow consciously planned movement
- B. A rapid involuntary response to a stimulus
- C. A permanent receptor change
- D. Only a hormonal response
Which component of a reflex arc detects the stimulus?
- A. Motor neuron
- B. Effector
- C. Receptor
- D. Interneuron
Which sequence correctly represents a simple reflex arc?
- A. Motor neuron → receptor → CNS → effector
- B. Effector → motor neuron → receptor → CNS
- C. CNS → receptor → sensory neuron → effector
- D. Receptor → sensory neuron → CNS → motor neuron → effector
Why can withdrawal of a hand from a hot object occur before conscious pain awareness?
- A. The spinal cord can organise the immediate response first
- B. Pain receptors bypass sensory neurons
- C. The brain never receives the signal
- D. Motor neurons detect heat directly
In a reflex arc, the neuron that carries the impulse from a sensory organ into the CNS via the dorsal nerve root of the spinal cord is the
- A. efferent neuron
- B. motor neuron
- C. afferent neuron
- D. interneuron
A person touches a hot surface and withdraws the hand. Which neuron carries the command from the spinal cord to the arm muscle?
- A. Sensory neuron
- B. Motor neuron
- C. Receptor neuron only
- D. Interneuron outside the CNS
The sensory neuron of a withdrawal reflex is destroyed, but the motor neuron and muscle remain intact. What happens after skin stimulation?
- A. The reflex becomes faster
- B. The muscle contracts normally
- C. The reflex is lost because the signal cannot reach the CNS
- D. The receptor activates the muscle directly
Where is an interneuron in a typical spinal reflex arc located?
- A. Within the tendon attachment
- B. Inside the receptor
- C. Inside the skeletal muscle
- D. Within the central nervous system
A person touches a hot object and withdraws the hand before feeling the pain. Which sequence describes the pathway of this reflex?
- A. Receptor -> efferent neuron -> brain -> afferent neuron -> effector
- B. Receptor -> brain -> spinal cord -> muscle
- C. Effector -> afferent neuron -> spinal cord -> receptor
- D. Receptor -> afferent neuron (dorsal root) -> spinal cord (interneuron) -> efferent neuron (ventral root) -> effector muscle
Common mistakes in Reflex action and the reflex arc
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Assuming intact sensory and motor neurons guarantee a normal reflex.
- Assuming more neurons automatically make a reflex faster.
- Assumes a reflex with more neurons must be the simpler or faster one.
- Assigns the motor loss to a dorsal root injury.
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