Neuron Function | MCQs

Explanation

A wave of electrochemical change that travels along the length of a neuron, from one end to the other, is called a nerve impulse. 

Explanation

Dendrites are branched fibers that receive nerve impulses and carry them toward the cell body.

They act like antennas, picking up signals from other neurons.

Explanation

The type of nerve impulse in a non-myelinated neuron is continuous. 

In unmyelinated neurons, the action potential travels along the entire axon membrane, requiring continuous depolarization and repolarization.

Whereas in myelinated neurons, the action potential "jumps" from node to node (saltatory conduction), which is much faster. 

Explanation

During the repolarization of a neuron, potassium ions (K+) exit the cell.

This efflux of potassium ions along their electrochemical gradient causes the membrane potential

To become more negative, returning the neuron towards its resting state.