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NCERT solutions Biology Textbook for Class 11 chapter 21 Neural Control and Coordination

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Chapter 21 - Neural Control and Coordination

Pages 328 - 329

Briefly describe the Given structure - Brain

Q 1.1 | Page 328 |

Briefly describe the Given structure - Eye

Q 1.2 | Page 328 |

Briefly describe the Given structure - Ear

Q 1.3 | Page 328 |

Compare the following: Central neural system (CNS) and Peripheral neural system (PNS)

Q 2.1 | Page 328 |

Compare the following:  Resting potential and action potential

Q 2.2 | Page 328 |

Compare the following: Choroid and retina

Q 2.3 | Page 328 |

Explain the following processes:

Polarisation of the membrane of a nerve fibre

Q 3.1 | Page 328 |

Explain the following processes:

Depolarisation of the membrane of a nerve fibre

Q 3.2 | Page 328 |

Explain the following processes:

Conduction of a nerve impulse along a nerve fibre

Q 3.3 | Page 328 |

Explain the following processes:

Transmission of a nerve impulse across a chemical synapse

Q 3.3 | Page 328 |

Draw labelled diagrams of the following - Neuron 

Q 4.1 | Page 328 |

 Draw labelled diagrams of the following: Brain 

Q 4.2 | Page 328 |

Draw labelled diagrams of the following: Eye

Q 4.3 | Page 328 |

 Draw labelled diagrams of the following: Ear

Q 4.4 | Page 328 |

Write short notes on the following: Neural coordination

Q 5.1 | Page 329 |

Write short notes on the following: Forebrain 

Q 5.2 | Page 329 |

Write short notes on the following: Midbrain

Q 5.3 | Page 329 |

Write short notes on the following: Hindbrain 

Q 5.4 | Page 329 |

Write short notes on the following: Retina 

Q 5.5 | Page 329 |

Write short notes on the following Ear ossicles

Q 5.6 | Page 329 |

Write short notes on the following: Cochlea 

Q 5.7 | Page 329 |

Write short notes on the following: Organ of Corti (i) Synapse

Q 5.8 | Page 329 |

Give a brief account of: Mechanism of synaptic transmission

Q 6.1 | Page 329 |

Give a brief account of: Mechanism of synaptic transmission

Q 6.2 | Page 329 |

Give a brief account of:  Mechanism of hearing

Q 6.3 | Page 329 |

Answer briefly:

How do you perceive the colour of an object?

Q 7.1 | Page 329 |

Which part of our body helps us in maintaining the body balance?

Q 7.2 | Page 329 |

How does the eye regulate the amount of light that falls on the retina?

Q 7.3 | Page 329 |

Explain the following

Role of Na+ in the generation of action potential.

Q 8.1 | Page 329 |

Explain the following:

Mechanism of generation of light-induced impulse in the retina.

Q 8.2 | Page 329 |

Explain the following:

Mechanism through which a sound produces a nerve impulse in the inner ear.

Q 8.3 | Page 329 |

Differentiate between: Myelinated and non-myelinated axons

Q 9.1 | Page 329 |

Differentiate between: Dendrites and axons

Q 9.2 | Page 329 |

Differentiate between: Rods and cones

Q 9.3 | Page 329 |

Differentiate between: Thalamus and Hypothalamus

Q 9.4 | Page 329 |

Differentiate between: Cerebrum and Cerebellum

Q 9.5 | Page 329 |

Answer the following:

Which part of the ear determines the pitch of a sound?

Q 10.1 | Page 329 |

Answer the following:

Which part of the human brain is the most developed?

Q 10.2 | Page 329 |

Answer the following:

Which part of our central neural system acts as a master clock?

Q 10.3 | Page 329 |

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

Q 11 | Page 329 |

Distinguish between: afferent neurons and efferent neurons

Q 12.1 | Page 329 |

Distinguish between: impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre

Q 12.2 | Page 329 |

Distinguish between: aqueous humor and vitreous humor

Q 12.3 | Page 329 |

Distinguish between: blind spot and yellow spot

Q 12.4 | Page 329 |

Distinguish between cranial nerves and spinal nerves.

Q 12.5 | Page 329 |

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