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प्रश्न
What will you do if someone pricks your hand with a needle? Elucidate the pathway of response with a neat labelled diagram.
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उत्तर
Reflex action and its pathway
The pathway taken by nerve impulses to accomplish reflex action is called the reflex arc.
- When the hand is pricked by a needle, the stimulus is the prick (touch) pain, which is sensed by a receptor called touch or pain receptors in the skin in our hand. This stimulus in tum triggers an impulse in a sensory neuron.
- The sensory neuron transmits or conveys the message to the spinal cord.
- The spinal cord interprets the stimulus and the impulse is passed on to the relay neuron, which in tum transmits it to a motor neuron.
- Motor neurons carry commands from the spinal cord to our arms.
- The muscle in our arm contracts and we withdraw our hand immediately from the needle prick. The muscle is the effector organ that has responded to the prick (pain).
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संबंधित प्रश्न
Give examples of unconditional reflexes
State whether coughing is a voluntary action or reflex action.
Explain the difference between of the following pair of terms :
receptor and effector
A cell (or group of cells) in a sense organ which is sensitive to a particular type of stimulus is called :
(a) interceptor
(b) effector
(c) receptor
(d) acceptor
what do we refer to in the nervous system when we say:
Natural and conditioned …………………
State whether the following is simple reflex, conditioned reflex or neither of the two.
Blushing
Give Technical Term:
Response to a stimulus without the intervention of the will of an animal.
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Which of the following is not an involuntary action?
Categorise the following under stimulus and response.
Seeing a green light turning into red at a road crossing before applying the brakes.
