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Class 11 Biology NCERT Solutions For Chapter 21 Neural Control and Coordination

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Download NCERT Solutions for Class 11 Biology

Chapter 21 Neural Control and Coordination

(Link of Pdf File is given below at the end of the Questions list)

In this pdf file you can see answers of following Questions


Question 1:
Briefly describe the structure of the following
(a) Brain (b) Eye (c) Ear
Question 2:
Compare the following:
(a) Central neural system (CNS) and Peripheral neural system (PNS)
(b) Resting potential and action potential
(c) Choroid and retina

Question 3:
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

Question 4:
Draw labelled diagrams of the following(a) Neuron (b) Brain (c) Eye (d) Ear
Question 5:
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

Question 6:
Give a brief account of:
(a) Mechanism of synaptic transmission
(b) Mechanism of vision
(c) Mechanism of hearing

Question 7:
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?
Question 8:
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.
Question 9:
Differentiate between:
(a) Myelinated and non-myelinated axons
(b) Dendrites and axons
(c) Rods and cones
(d) Thalamus and Hypothalamus
(e) Cerebrum and Cerebellum

Question 10:
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?
Question 11:
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

Question 12:
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.

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