Nervous System: Short Answer Concise Class 10 ICSE Biology Selina Solutions

Nervous System: Short Answer Concise Class 10 ICSE Biology Selina Solutions Ch-10. In this article you will get the solutions of Short Answer Type Questions as council latest syllabus. Visit official website CISCE for detail information about ICSE Board Class-10 Biology.

Nervous System: Short Answer Concise Class 10 ICSE Biology Selina Solutions Ch-10

Board	ICSE
Subject	Biology
Class	10
Book	Selina Concise
Chapter-10	Nervous System
Topics	Short Answer Type Questions
Session	2025-26

 Short Answer Type Questions on Nervous System

( Concise Class 10 ICSE Biology Selina Solutions Ch-10 )

Que-1:Mention where in human body are the following located and state their main functions:

(a) Corpus callosum
(b) Central canal
Sol:
(a)Corpus Callosum— Corpus callosum (“hard body”) is a sheet of fibres connecting the two cerebral hemispheres. It is located in the forebrain. It connects two cerebral hemispheres and transfers information from one hemisphere to other.
(b) Central Canal — It is located in centre of the spinal cord. It is in continuation with the cavities of the brain. It is filled with cerebrospinal fluid and acts as shock proof cushion. In addition, it also helps in exchange of materials with neurons.

Que-2: State whether the following statements are true (T) or false (F).

(a) The main component of the white matter of the brain is perikaryon.
(b) The arachnoid layer fits closely inside the pia mater.
(c) A double chain of ganglia, one on each side of the nerve cord belongs to the spinal cord.
(d) Dura mater is the outermost layer of the meninges.
Sol:
(a) False
(b) False
(c) True
(d) True

Que-3: State whether the following are simple reflexes, conditioned reflexes or neither of the two.

(i) Sneezing ……………
(ii) Blushing ……………
(iii) Contraction of eye pupil ……………
(iv) Lifting up a book ……………
(v) Knitting without looking ……………
(vi) Sudden application of brakes of the cycle on sighting an obstacle in front ……………
Sol:

S. No.	Example	Type of Reflex
(i)	Sneezing	Simple
(ii)	Blushing	Simple
(iii)	Contraction of eye pupil	Simple
(iv)	Lifting up a book	Conditioned
(v)	Knitting without looking	Conditioned
(vi)	Sudden application of brakes of the cycle on sighting an obstacle in front	Conditioned

Que-4: State the functions of the following:

(a) Association neuron
(b) Myelin sheath
(c) Medullary sheath
(d) Cerebrospinal fluid
Sol:
(a)Association Neuron: Connects sensory and motor neurons within the CNS.
(b)Myelin Sheath: Insulates axons and speeds up impulse transmission.
(c)Medullary Sheath: Same as the myelin sheath, it insulates axons and prevents signal interference.
(d)Cerebrospinal Fluid: Cushions and protects the brain and spinal cord from shocks.

Que-5: Rearrange the following in correct sequence pertaining to what is given within brackets at the end.

(a) Effector — Sensory neuron — Receptor — Motor neuron — Stimulus — Central nervous system — Response (Reflex arc)
(b) Repolarization — Depolarization — Resting (polarsied) (during conduction of nerve impulse through a nerve fibre)
(c) Axon endings — Dendrites — Axon — Perikaryon — Dendron (Neuron structure)
(d) Diencephalon — Cerebellum — Medulla oblongata — Pons — Cerebrum — mid brain (sequence of parts of human brain).
Sol:
(a) Stimulus — receptor — sensory neuron — central nervous system — motor neuron — effector — response.
(b) Resting — depolarization — repolarization.
(c) Dendrites — Dendron — perikaryon — nucleus — axon — axon endings.
(d) Cerebrum — diencephalon — mid-brain — cerebellum — pons — medulla oblongata.

Que-6: Name the following:

(a) Three types of neurons
(b) Three types of nerves
(c) Three main parts of the neuron
(d) Two major divisions of the nervous system
(e) Three layers of the meninges
(f) Three main parts of the brain
(g) Two parts of the autonomic nervous system
(h) Two types of reflexes.
Sol:
(a) Three types of neurons —

1. Sensory neurons
2. Motor neurons
3. Association neurons

(b) Three types of nerves —

1. Sensory nerves
2. Motor nerves
3. Mixed nerves

(c) Three main parts of the neuron —

1. Cyton
2. Dendrites
3. Axon

(d) Two major divisions of the nervous system —

1. Central nervous system
2. Peripheral nervous system

(e) Three layers of the meninges —

1. Dura mater
2. Arachnoid
3. Pia mater

(f) Three main parts of the brain —

1. Cerebrum
2. Cerebellum
3. Medulla oblongata

(g) Two parts of the autonomic nervous system —

1. Sympathetic nervous system
2. Parasympathetic nervous system

(h) Two types of reflexes —

1. Natural (inborn) reflex
2. Conditioned (acquired) reflex.

Que-7: Write the full forms of the following abbreviations:

(a) CSF
(b) CNS
(c) PNS
(d) ANS
Sol:
(a) CSF — Cerebrospinal fluid
(b) CNS — Central Nervous System
(c) PNS — Peripheral Nervous System
(d) ANS — Autonomic Nervous System

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