- Exam
- NEET
- Subject
- Zoology
- Chapter
- Neural Control and Coordination
NEET · Zoology · Neural Control and Coordination
What is the electrical potential difference across the resting...
Options
- AResting potential
- BAction potential
- CSodium potential
- DPotassium potential
Correct answer
A. Resting potential
Step-by-step solution
Based on the number of axons and dendrites, neurons are divided into three types: multipolar (with one axon and two or more dendrites), bipolar (with one axon and one dendrite), and unipolar (cell body with one axon only).Nissl’s granules are granular bodies in the cell body of a neuron. They are composed of typical cell organelles and are also present in the dendrites. The synaptic knob is a bulb-like structure at the distal end of the axon of a neuron. It possesses synaptic vesicles containing neurotransmitters. Dendrites are short fibres that branch repeatedly and project out of the cell body
The electrical potential difference across the resting plasma membrane is called the resting potential. The outer surface of the axonal membrane possesses a positive charge while its inner surface becomes negatively charged and therefore is polarised. The membrane of a neuron is polarised due to the presence of different types of ion channels and the ionic gradients maintained by the sodium-potassium pump