Match the columns: Column I Column II 1. Covering of the neuron (a) Acetylcholine 2. Functional junction of the neuron (b) To transmit the impulse 3. Sensory neuron (c) Myelin sheath 4. Protective fluid in the brain (d) Synapse 5. Connecting neuron (e) Efferent neuron 6. Neurotransmitter (f) Cerebrospinal fluid 7. Motor neuron (g) Afferent neuron 8. Function of neuron (h) lnterneuron

Column I Column II 1. Covering of neuron (c) Myelin sheath 2. Functional junction of the neuron (d) Synapse 3. Sensory neuron (g) Afferent neuron 4. Protective fluid in the brain (f) Cerebrospinal fluid 5. Connecting neuron (h) interneuron 6. Neurotransmitter (a) Acetylcholine 7. Motor neuron (e) Efferent neuron 8. The function of the neuron (b) is To transmit impulse 1. The myelin sheath has many functions in the nervous system. The main functions include protecting the nerves from other electrical impulses and speeding the time it takes for a nerve to traverse an axon. 2. Synapse is also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells or between a neuron and a gland or muscle cell. 3. Afferent neurons are sensory neurons that carry nerve impulses from sensory stimuli toward the central nervous system and brain. 4. Cerebrospinal fluid protects the brain tissue from injury when jolted or hit and is present between the arachnoid mater and the pia mater. 5. Interneurons connect neurons to other neurons within the same region of the brain or spinal cord. 6. Acetylcholine is a neurotransmitter that is a chemical released by a nerve cell or neuron. It functions to contract smooth muscles, dilate blood vessels, increase bodily secretions, slow the heart rate and is part of the autonomic nervous system. 7. Efferent neurons are motor neurons that carry neural impulses away from the central nervous system and towards muscles to cause movement. 8. The transmission of a nerve impulse along a neuron from one end to the other occurs as a result of electrical changes across the membrane of the neuron.

The branching of dendrons is called dendrites. These are the structures on the neuron that receive electrical messages. These signals will accumulate in the cell body of the neuron after being received by the dendrites.

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New Trends in ICSE BIOLOGY 8>Chapter 7 - Nervous System>Exercises>Q 2

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The automatic response by a body towards the stimulus:

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Important Questions on Nervous System

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New Trends in ICSE BIOLOGY 8>Chapter 7 - Nervous System>Exercises>Q 3

The structural and functional unit of the nervous system is known as

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New Trends in ICSE BIOLOGY 8>Chapter 7 - Nervous System>Exercises>Q 4

Brain is mainly divided in _____ parts.

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New Trends in ICSE BIOLOGY 8>Chapter 7 - Nervous System>Exercises>Q 1

Match the columns:

Column I	Column II
1. Covering of the neuron	(a) Acetylcholine
2. Functional junction of the neuron	(b) To transmit the impulse
3. Sensory neuron	(c) Myelin sheath
4. Protective fluid in the brain	(d) Synapse
5. Connecting neuron	(e) Efferent neuron
6. Neurotransmitter	(f) Cerebrospinal fluid
7. Motor neuron	(g) Afferent neuron
8. Function of neuron	(h) lnterneuron