Psych Module- 5 Neurons

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The branchlike fibers extending in clusters from the neuron’s cell body are called

dendrites Most neurons have many dendrites that project from the cell body. The dendrites receive messages—in the form of electrical stimulation—from other neurons and transmit them to the cell body.

The function of the ______ is to keep the cell alive.

soma The soma is the part of the cell that contains the nucleus, which provides energy and keeps the cell alive.

An axon is a ____________.

long, tubelike structure extending from a neuron’s cell body The axon is a thin fiber extending from the soma that passes messages along to the next neuron, muscle, or gland.

Terminal buttons are found at the ends of _________

axons Terminal buttons are found at the end of the axon where they are responsible for releasing neurotransmitters they are storing when an action potential happens.

Dendrite is to axon as _________ is to _________.

receiving; sending The dendrite receives information from other cells and sends that information to the axon.

Which of the following sequences accurately reflects the route followed by nerve impulses when one neuron communicates with another?

Dendrite, cell body, axon The nerve impulses are received by the dendrite, then passed on to the cell body, and then along down the axon.

What is the term for the insulating material that covers some axons?

Myelin Myelin sheath is the fatty coating that covers the axons.

What are the gaps in the myelin sheath called?

Nodes of Ranvier The gaps in the myelin sheath are called nodes of Ranvier.

A synapse is a __________.

gap The synapse is a junction where two neurons meet and actually is a gap because the neurons do not physically touch. Neurotransmitters pass through this area to the next neuron.

What neurotransmitter is important if there is an injury and pain relief is necessary?

Endorphins Endorphins are a natural pain reliever!

My Aunt Mabel has Alzheimer’s disease. What neurotransmitter is likely in low supply in her brain?

Acetylcholine Acetylcholine has been found to be linked to Alzheimer’s disease.

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