Welcome to the NCERT Solutions for Class 11 Biology - Chapter Neural Control and Coordination. This page offers a step-by-step solution to the specific question from Exercise 1, Question 9: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.
(a) Myelinated and non-myelinated axons
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Myelinated axons |
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Non-myelinated axons |
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1. |
Transmission of nerve impulse is faster |
1. |
Transmission of nerve impulse is slower |
|
2. |
Myelinated axon has a myelin sheath. |
2. |
Myelin sheath is absent |
|
3. |
Node of Ranvier is present between adjacent myelin sheaths. |
3. |
Node of Ranvier is absent |
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4. |
Found in the brain, the spinal cord, the cranial and spinal nerves |
4. |
Found in autonomous and somatic neural systems |
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5. |
Schwann cells are observed inside the myelin sheath |
5. |
Schwann cells are not observed inside the myelin sheath |
(b) Dendrites and axons
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Dendrites |
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Axons |
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1. |
Dendrite is a small projection arising from the neuron. It conducts the nerve impulse toward the cell body. |
1. |
Axon is a single, long projection that conducts the nerve impulse away from cell body to the next neuron. |
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2. |
Nissl’s granules are present in dendrites. |
2. |
Nissl’s granules are absent from axons. |
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3. |
Dendrites are always non-myelinated. |
3. |
Axons can be myelinated or non-myelinated. |
(c) Rods and cones
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Rods |
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Cones |
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1. |
Rods help in twilight vision. |
1. |
Cones help in colour vision. |
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2. |
They have visual purple pigment called rhodopsin. |
2. |
They have visual violet pigment called iodopsin. |
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3. |
Rods are the photoreceptor cells of the retina that are sensitive to dim light. |
3. |
Cones are the photoreceptor cells of the retina that are sensitive to bright light. |
(d) Thalamus and Hypothalamus
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Thalamus |
Hypothalamus |
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Thalamus is the part of the forebrain that receives nerve impulses of pain, temperature, touch, etc., and conducts them to the cerebral hemisphere. |
Hypothalamus is the part of the forebrain that controls involuntary functions such as hunger, thirst, sweating, sleep, fatigue, sexual desire, temperature regulation, etc. |
(e) Cerebrum and Cerebellum
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Cerebrum |
Cerebellum |
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It is the part of the forebrain that controls voluntary functions. It is the place where intelligence, will power, memory, etc., reside. |
It is the part of the hindbrain that controls voluntary functions and controls the equilibrium. |
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
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