Distinguish between: (a) Afferent neurons and efferent neurons

Question:

Distinguish between:

(a) Afferent neurons and efferent neurons

(b) Impulse conduction in myelinated and unmyelinated nerve fibre

(c) Cranial nerves and spinal nerves

‍

Answer:

(a) Afferent neurons and efferent neurons

Feature	Afferent (Sensory)	Efferent (Motor)
Function	Carry impulses to CNS	Carry impulses from CNS to muscles/glands
Direction	Body → CNS	CNS → Body

‍

(b) Impulse conduction in myelinated and unmyelinated nerve fibre

Feature	Myelinated	Unmyelinated
Conduction speed	Fast	Slow
Mechanism	Saltatory conduction (jumps node to node)	Continuous conduction along axon

‍

Feature	Cranial nerves	Spinal nerves
Number	12 pairs	31 pairs
Function	Head, neck, senses, face muscles	Body muscles, limbs, trunk, reflexes
Origin	Brain	Spinal cord

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Chapter 18 NCERT Class 11 Biology SOLUTIONS

Question:

Answer:

More NCERT Questions

Answer the following: (a) Which part of the human brain is the most developed?

Differentiate between: (a) Myelinated and non-myelinated axons

Explain the role of Na⁺ in the generation of action potential

Give a brief account of Mechanism of synaptic transmission

Write short notes on the following: (a) Neural coordination (b) Forebrain (c) Midbrain (d) Hindbrain (e) Synapse

Draw labelled diagrams of the following: (a) Neuron (b) Brain

Briefly describe the structure of the brain?

Compare the following: (a) Central nervous system (CNS) and Peripheral nervous system (PNS) (b) Resting potential and Action potential

Briefly describe the structure of the brain?

How do nervous systems differ in simple and complex animals?

What are the differences between voluntary and involuntary actions in the nervous system?

What is a reflex action, and how does it work?

What is the difference between the CNS and PNS?

How do animals respond to stimuli through the nervous system?

What are the types of neurons in the nervous system?

How do neurons work in the nervous system?

What is the function of the nervous system in animals?

What are the main components of the nervous system?

What is the nervous system in animals?

Related Topics

Chapter 18 NCERT Class 11 Biology SOLUTIONS

Question:

Answer:

More NCERT Questions

Answer the following: (a) Which part of the human brain is the most developed?

Differentiate between: (a) Myelinated and non-myelinated axons

Explain the role of Na⁺ in the generation of action potential

Give a brief account of Mechanism of synaptic transmission

Write short notes on the following: (a) Neural coordination (b) Forebrain (c) Midbrain (d) Hindbrain (e) Synapse

Draw labelled diagrams of the following: (a) Neuron (b) Brain

Briefly describe the structure of the brain?

Compare the following: (a) Central nervous system (CNS) and Peripheral nervous system (PNS) (b) Resting potential and Action potential

Briefly describe the structure of the brain?

How do nervous systems differ in simple and complex animals?

What are the differences between voluntary and involuntary actions in the nervous system?

What is a reflex action, and how does it work?

What is the difference between the CNS and PNS?

How do animals respond to stimuli through the nervous system?

What are the types of neurons in the nervous system?

How do neurons work in the nervous system?

What is the function of the nervous system in animals?

What are the main components of the nervous system?

What is the nervous system in animals?

Related Topics

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