
Explain the following process
A. The polarisation of the membrane of a nerve fibre
B. The depolarization of the membrane of a nerve fibre
C. Conduction of nerve impulses along with the nerve fibre
D. Transmission of nerve impulses across a chemical synapse
Answer
483.6k+ views
2 likes
Hint: A nerve fibre is a long nerve cell pathway known as the axon. The body of the nerve cell is found anatomically in the central nervous system or inside the peripheral nervous system's ganglia.
Complete Answer:
A. The polarisation of the membrane of a nerve fibre
The concentration of K+ ions is more within the axoplasm during the resting state, while the concentration of Na+ ions is more outside the axoplasm. As a consequence, in contrast to sodium ions, potassium ions travel further from inside to outside. The membrane then becomes outside positively charged and inside negatively charged. This is known as the polarisation of the polarised nerve or membrane.
B. The depolarization of the membrane of a nerve fibre
An action potential is produced when an electrical stimulus is given to a nerve fibre. The membrane, rather than potassium ions, becomes permeable to sodium ions. This results in a positive charge outside of the nerve fibre within and a negative charge outside. The membrane is thus said to be depolarized.
C. Conduction of nerve impulses along with the nerve fibre
An action potential is produced when an electrical stimulus is given to a nerve fibre. The membrane, rather than potassium ions, becomes permeable to sodium ions. This results in a positive charge outside of the nerve fibre within and a negative charge outside. The membrane is thus said to be depolarized.
D. The transmission of nerve impulses across a chemical synapse
At chemical synapses, signals are sent from the axon terminal of the presynaptic cell through the synaptic cleft by releasing neurotransmitters.
Note: Synapse is a slight gap arising between one neuron's last section of the axon and the next neuron's dendrite. Vesicles composed of neurotransmitters combine with the plasma membrane as an impulse enters the final plate of the axon.
Complete Answer:
A. The polarisation of the membrane of a nerve fibre
The concentration of K+ ions is more within the axoplasm during the resting state, while the concentration of Na+ ions is more outside the axoplasm. As a consequence, in contrast to sodium ions, potassium ions travel further from inside to outside. The membrane then becomes outside positively charged and inside negatively charged. This is known as the polarisation of the polarised nerve or membrane.
B. The depolarization of the membrane of a nerve fibre
An action potential is produced when an electrical stimulus is given to a nerve fibre. The membrane, rather than potassium ions, becomes permeable to sodium ions. This results in a positive charge outside of the nerve fibre within and a negative charge outside. The membrane is thus said to be depolarized.
C. Conduction of nerve impulses along with the nerve fibre
An action potential is produced when an electrical stimulus is given to a nerve fibre. The membrane, rather than potassium ions, becomes permeable to sodium ions. This results in a positive charge outside of the nerve fibre within and a negative charge outside. The membrane is thus said to be depolarized.
D. The transmission of nerve impulses across a chemical synapse
At chemical synapses, signals are sent from the axon terminal of the presynaptic cell through the synaptic cleft by releasing neurotransmitters.
Note: Synapse is a slight gap arising between one neuron's last section of the axon and the next neuron's dendrite. Vesicles composed of neurotransmitters combine with the plasma membrane as an impulse enters the final plate of the axon.
Latest Vedantu courses for you
Grade 10 | MAHARASHTRABOARD | SCHOOL | English
Vedantu 10 Maharashtra Pro Lite (2025-26)
School Full course for MAHARASHTRABOARD students
₹33,300 per year
Recently Updated Pages
Master Class 10 Science: Engaging Questions & Answers for Success

Master Class 10 Social Science: Engaging Questions & Answers for Success

Master Class 10 Maths: Engaging Questions & Answers for Success

Master Class 10 English: Engaging Questions & Answers for Success

Class 10 Question and Answer - Your Ultimate Solutions Guide

Master Class 10 Computer Science: Engaging Questions & Answers for Success

Trending doubts
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths

Fill the blanks with proper collective nouns 1 A of class 10 english CBSE

Which one is a true fish A Jellyfish B Starfish C Dogfish class 10 biology CBSE

Why is there a time difference of about 5 hours between class 10 social science CBSE

What is the median of the first 10 natural numbers class 10 maths CBSE

Change the following sentences into negative and interrogative class 10 english CBSE
