Question

Choose the correct statement(s) about ionic equilibrium of neurons:

• A. Leak channels and sodium-potassium ATPase is present throughout the neurons.
• B. In myelinated neurons, the voltage gated channels are present throughout.
• C. Ligand gated channel are present at dendrites and soma.
• D. Voltage and ligand gated channel are responsible for initiation and maintenance of action potential.

Answer 1

Answer: (A), (C), (D)

The correct options are
A Leak channels and sodium-potassium ATPase is present throughout the neurons.
C Ligand gated channel are present at dendrites and soma.
D Voltage and ligand gated channel are responsible for initiation and maintenance of action potential.

In myelinated neurons, voltage gated channels are present only in the clusters of Nodes of Ranvier. In case of unmyelinated axons, they are present throughout the axon and even on the axon terminals.