Define reflex action.

Reflex action is an involuntary action in response to a stimulus that is controlled by the spinal cord together with the medulla oblongata. Some important components that altogether function to form a reflex action are receptor organs, sensory neurons, nerve centres, interneurons, motor neurons, and effectors. When we touch a hot or cold object immediately, we pull our hands away is an example of a reflex action.

E M B I B E

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 6

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8th ICSE

IMPORTANT

Earn 100

Briefly differentiate between the following by giving examples:

Inborn and acquired reflexes.

Important Questions on Nervous System

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IMPORTANT

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 1

Medulla oblongata controls

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IMPORTANT

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 1

Balance of the body is controlled by

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IMPORTANT

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 1

The smell of good causes watering of your mouth. It is

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IMPORTANT

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 1

The structural and functional unit of the nervous system is

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IMPORTANT

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 1

You are driving your bicycle at a fast speed. Suddenly, a small boy comes in front of your cycle and without wasting any time in thinking, you immediately apply the brakes and the accident is avoided. What name is given to such an action?

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Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 2

Name the following.

The long, extended process of a neuron:

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IMPORTANT

Concise Biology Class 8>Chapter 7 - Nervous System>REVIEW QUESTIONS>Q 2

Name the following.

The point of contact between two neurons: