Class 11 Biology - Chapter Neural Control and Coordination NCERT Solutions | Compare the following: (a) Central neura
Compare the following:
(a) Central neural system (CNS) and Peripheral neural system (PNS)
(b) Resting potential and action potential
(c) Choroid and retina
(a) Central neural system (CNS) and Peripheral neural system (PNS)
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Central neural system |
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Peripheral neural system |
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1. |
It is the main coordinating centre of the body. |
1. |
It is not the main coordinating centre of the body. |
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2. |
It includes brain and spinal cord. |
2. |
It includes cranial and spinal nerves that connect central nervous system to different parts of the body. |
(b) Resting potential and action potential
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Resting potential |
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Action potential |
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1. |
It is the potential difference across the nerve fibre when there is no conduction of nerve impulse. |
1. |
It is the potential difference across nerve fibre when there is conduction of nerve impulse. |
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2. |
The membrane is more permeable to K+ ions than to Na+ ions. |
2. |
The membrane is more permeable to Na+ ions than to K+ ions. |
(c) Choroid and retina
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Choroid |
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Retina |
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1. |
Choroid is the middle vascular layer of eye. |
1. |
Retina is the innermost nervous coat of eye. |
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2. |
It contains numerous blood vessels that provide nutrients and oxygen to retina and other tissues. |
2. |
It contains photoreceptor cells, rods and cones that are associated with twilight and colour vision respectively. |
More Questions From Class 11 Biology - Chapter Nueral Control and Coordination
- Q:- Explain the following processes:
(a) Polarisation of the membrane of a nerve fibre
(b) Depolarisation of the membrane of a nerve fibre
(c) Conduction of a nerve impulse along a nerve fibre
(d) Transmission of a nerve impulse across a chemical synapse - Q:-
Briefly describe the structure of the following:
(a) Brain
(b) Eye
(c) Ear - Q:- Explain the following:
(a) Role of Na+ in the generation of action potential.
(b) Mechanism of generation of light-induced impulse in the retina.
(c) Mechanism through which a sound produces a nerve impulse in the inner ear. - Q:- Write short notes on the following:
(a) Neural coordination
(b) Forebrain
(c) Midbrain
(d) Hindbrain
(e) Retina
(f) Ear ossicles
(g) Cochlea
(h) Organ of Corti
(i) Synapse - Q:- Give a brief account of:
(a) Mechanism of synaptic transmission
(b) Mechanism of vision
(c) Mechanism of hearing - Q:- Differentiate between:
(a) Myelinated and non-myelinated axons
(b) Dendrites and axons
(c) Rods and cones
(d) Thalamus and Hypothalamus
(e) Cerebrum and Cerebellum - Q:- Answer the following:
(a) Which part of the ear determines the pitch of a sound?
(b) Which part of the human brain is the most developed?
(c) Which part of our central neural system acts as a master clock? - Q:- Distinguish between:
(a) afferent neurons and efferent neurons
(b) impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
(c) aqueous humor and vitreous humor
(d) blind spot and yellow spot
(f) cranial nerves and spinal nerves. - Q:- Answer briefly:
(a) How do you perceive the colour of an object?
(b) Which part of our body helps us in maintaining the body balance?
(c) How does the eye regulate the amount of light that falls on the retina? - Q:- The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the
(a) fovea
(b) iris
(c) blind spot
(d) optic chaisma
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