neurons 8.1

What does the nervous system control?

The body and its functions.

What cells does nervous tissue contain?

Neurons and glial cells.

What do neurons do?

Receive and conduct signals.

What do glial cells do?

Feed and protect neurons.

What parts does a neuron have?

Cell body, dendrites, axon.

What do dendrites do?

Receive signals and transfer them to the cell body.

What does the axon do?

Sends information away from the cell body

What types of neurons exist?

Sensory neurons, interneurons, motor neurons.

What do sensory neurons do?

Receive signals from sensory organs and carry them to the nervous system.

Where are interneurons located and what do they do?

In the brain and spinal cord; they transmit signals from sensory to motor neurons.

What do motor neurons do?

Carry signals from interneurons to muscles.

What types of axons are there?

Myelinated and unmyelinated.

What do myelinated axons do?

Conduct signals faster.

What is a synapse?

Connection between the axon of one neuron and the body or dendrites of another neuron.

How is information transmitted through a synapse?

Through neurotransmitters.

How many neurons are in the brain?

About 100 billion.

At what speed does information travel in neurons?

Up to 274 km/h.