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NCERT solutions for class 11 biology chapter 21 Neural Control and Coordination
Neurons are highly specialised cells in all animals which help in detecting, receiving and transmitting of the signals. Central nervous system (CNS) and peripheral nervous system (PNS) are two divisions of the brain in the human body. Signals from organs or tissues are transmitted to CNS through afferent nerve fibres. Whereas the impulses from CNS to organs is transmitted through efferent fibres. The parts of a neuron are Dendrites, cell body, nucleus, Nissl’s granules, Schwann cell, Axon, Myelin sheath, Node of Ranvier, Axon terminal, Synaptic knob. This is a brief on Neural Control and Coordination.
NCERT Solutions for Class 11 Biology Neural Control and Coordination chapter briefs the following concepts:
- Neural system
- Human neural system:
- Afferent fibres.
- Efferent fibres.
- The neuron as a structural and functional unit of the neural system
- Generation and conduction of nerve impulse:
- Resting potential.
- Action potential.
- Transmission of impulses:
- Synaptic Cleft.
- Central neural system:
- Reflex action and reflex arc.
- Sensory reception and processing.
- Parts of an eye.
- Mechanism of vision.
- The ear: Mechanism of hearing.
Class 11 Biology NCERT Solutions Neural Control and Coordination Important Questions
(b) Resting potential and action potential
(c) Choroid and retina
(b) Dendrites and axons
(c) Rods and cones
(d) Thalamus and Hypothalamus
(e) Cerebrum and Cerebellum
(f) Cranial nerves and spinal nerves
Answer: (c) Blindspot
(a) Afferent neurons and efferent neurons
(b) Impulse conduction in a myelinated nerve fibre and a unmyelinated nerve fibre
(c) Aqueous humour and vitreous humour
(d) Blind spot and yellow spot
(e) Cranial nerves and spinal nerves
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