The given diagram shows a simple reflex arc. Which labeled part has sensory neuron?
Correct answer: A. B
- A. B
- B. C
- C. D
- D. A
Explanation
Reflex arc refers to the pathway through which a reflex travels from the site of stimulus to sensory neuron to motor neuron to reflex muscle movement. A sensory neuron functions to carry the stimulus from the receptor site whereas a motor neuron carries signals to a muscle or organ for reflex action. In the given diagram A is the receptor, B is sensory neuron, C is a Synapse and D is an effector muscle connected to a motor neuron.
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About Reflexes and the Reflex Arc
A reflex arc shows how a rapid, automatic response travels from a receptor through a sensory neuron, relay neuron and motor neuron to an effector. The topic covers synapses, the spinal cord's role, and the difference between an involuntary reflex action and a slower voluntary response.
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