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Question
A reflex arc in man is best described as movement of stimuli from:
Options
Receptor cell, sensory neuron, relaying neuron, effector muscles
Receptor cell, efferent nerve, relaying neuron, muscles of the body
Receptor cell, spinal cord, motor neuron, relaying neuron
Receptor cell, synapse, motor neuron, relaying neuron
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Solution
Receptor cell, sensory neuron, relaying neuron, effector muscles
Explanation:
The exact path of a reflex action is:
Receptor (receives stimulus) → Sensory nerve (carries signal) → Relaying neuron (inside spinal cord) → Effector muscles (responds)
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RELATED QUESTIONS
What is the role of the brain in reflex action?
Explain the difference between of the following pair of terms :
cerebrum and cerebellum
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the cells in your nasal passages which perceive the smell?
Give the flow chart of a spinal reflex arc.
Which of the following is not an involuntary action?
(a) vomiting
(b) chewing
(c) heart beat
(d) salivation
The part of brain which controls the involuntary action such as heart beat, breathing, blood pressure, etc. is :
(a) pons
(b) medulla
(c) cerebrum
(d) cerebellum
Write down the following activities in the correct order for a simple reflex arc:
(a) impulse travels in the motor fibre
(b) impulse travels in the sensory fibre
(c) effector organ stimulated
(d) impulse crosses the synapse
Give Reason:
The hand automatically shows the direction to turn a cycle without thinking.
Mention, if the following statement is True or False
Reflex action involves brain
Why have reflex arcs evolved in animals?
