Nervous Tissue

What are the two major types of nerve cells?

Neurons and Neuroglia.

What is the function of neurons?

To conduct impulses around the body.

What percentage of nerve cells are neurons?

10%.

What is the function of neuroglia?

To support, insulate, and protect neurons.

What percentage of nerve cells are neuroglia?

90%.

What are the main components of a neuron?

A main cell body, dendrites, and an axon.

What are dendrites?

Processes that bring impulses towards the cell body.

What are axons?

Processes that send impulses away from the cell body.

What do axon terminals release?

Neurotransmitters to pass the impulse to the next neuron.

How are neurons classified based on the number of processes?

Unipolar, Bipolar, and Multipolar.

What is a unipolar neuron?

A neuron with one process extending from the cell body.

What is a bipolar neuron?

A neuron with two processes extending from the cell body.

What is a multipolar neuron?

A neuron with many processes extending from the cell body.

What are afferent neurons?

Neurons that carry impulses towards the CNS.

What are efferent neurons?

Neurons that carry impulses away from the CNS.

What are interneurons?

Neurons that connect afferent and efferent neurons.

What is the summary of neuron roles in the nervous system?

Neurons make up 10% of the nervous system tissue and are essential for carrying impulses.