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Question
Diagram based question:
1. Fill in the blanks in fig. A: (i), (ii), (iii) and (iv).
2. Which action does the figure depict?
Diagram based question:
1. Fill in the blanks in fig. A: (i), (ii), (iii) and (iv).
2. Which action does the figure depict?
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Solution
1. The labelling for the fig. A:
- Receptor(skin).
- Sensory neuron.
- Motor neuron.
- Effector(muscle or gland).
2. The action depicted in the figure is “reflex action”:
- Reflex action is a sudden and involuntary response against any external stimulus.
- It occurs due to the nervous system that comprises neurons and the pathway through which reflex action takes place is called a reflex arc.
- In this process, the signals are received by the receptors that are present in the skin or any sensory organ.
- Further the information is sent to the central nervous system(CNS) by the sensory neurons via the spinal cord.
- The signals are processed in the CNS and sent toward the effector (muscles) by the motor neuron.
1. The labelling for the fig. A:
- Receptor(skin).
- Sensory neuron.
- Motor neuron.
- Effector(muscle or gland).
2. The action depicted in the figure is “reflex action”:
- Reflex action is a sudden and involuntary response against any external stimulus.
- It occurs due to the nervous system that comprises neurons and the pathway through which reflex action takes place is called a reflex arc.
- In this process, the signals are received by the receptors that are present in the skin or any sensory organ.
- Further the information is sent to the central nervous system(CNS) by the sensory neurons via the spinal cord.
- The signals are processed in the CNS and sent toward the effector (muscles) by the motor neuron.
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