Nerve Cell Structure and Function Quiz

Where do membrane polarization, depolarization, and repolarization occur in the myelinated nerve fiber?

What is the gap between the terminal button of one neuron and the cell membrane of another neuron called?

What is the ability of a nerve to respond to stimuli known as?

What is the minimal stimulus that can produce a propagated nerve impulse in a nerve fiber called?

During which phase of the action potential does the membrane polarity rapidly reverse, making the inner surface positive to the outer surface?

What is the main role of the myelin sheath around the nerve fiber?

Which component of a nervous cell conducts nerve impulses away from the cell body?

What is the main function of dendrites in a neuron?

What is the structure that forms the myelin sheath around the nerve fiber?

In the peripheral nerves, what type of nerve fibers do dendrites make?

Nerve Fiber Physiology

Membrane polarization, depolarization, and repolarization occur across the axon of myelinated nerve fibers.
An action potential occurs when depolarization happens rapidly, reversing the membrane polarity and making the inner surface positive relative to the outer surface.
Repolarization follows depolarization, restoring the resting membrane potential.

Synaptic Communication

The gap between the terminal button of one neuron and the cell membrane of another neuron is known as the synaptic cleft.

Neuronal Properties

The ability of a nerve to respond to stimuli is referred to as excitability.
The minimal stimulus necessary to produce a propagated nerve impulse is called the threshold stimulus.

Function of Myelin Sheath

The myelin sheath serves to insulate nerve fibers, increasing the speed of electrical impulses and facilitating efficient signal transmission.

Neuron Structure and Function

Axons conduct nerve impulses away from the cell body, transmitting information to other neurons or muscles.
Dendrites are responsible for receiving signals from other neurons, playing a crucial role in synaptic transmission.

Myelin Formation

The myelin sheath around the nerve fiber is formed by Schwann cells in the peripheral nervous system.

Dendritic Fiber Types

In peripheral nerves, dendrites primarily consist of sensory nerve fibers that facilitate the transmission of sensory information.

Test your understanding of the functional structure of nerve cells, the role of the myelin sheath, conduction of impulses, electrical changes due to a stimulus, and excitability changes. Explore the components of the nervous system, including the central nervous system (CNS) and peripheral nerves.