Chapter 12 Flashcards by Marissa DePolo | Brainscape

Q

What does the endocrine system do?

A

communicates with hormones

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Q

What does the nervous system do?

A

communicates with electrical and chemical means

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Q

What do sense organs do?

A

receive info about changes and transmits cody messages

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Q

What are issue commands?

A

sends commands to muscles and glands

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Q

What are the two types of nervous systems?

A

central and peripheral

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Q

What is the central nervous system?

A

brain and spinal cord

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Q

What is the peripheral nervous system?

A

everything except brain and spinal chord

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Q

What do afferent neurons do?

A

conduct signals towards CNS

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Q

What do motor efferent neurons do?

A

send signals out to muscles and gland cells

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Q

What is sympathetic division?

A

arouses the body for action

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Q

What is parasympathetic division?

A

calms down the body

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Q

What is the soma of a neuron?

A

the control center of the neuron

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Q

What is the dendrite of the neuron?

A

branches coming off of the soma

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Q

What is the axon?

A

nerve fiber that travels away from the soma

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Q

Whats a multipolar neuron?

A

one axon and multiple dendrites

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Q

What is a bipolar neuron?

A

one axon and one dendrite

Q

What is a unipolar neuron?

A

single process away from soma

Q

What is an anaxonic neuron?

A

many dendrites but no axon

Q

How many neurons to a nervous system?

A

one trillion

Q

What is the ratio from neuroglia to neurons?

A

50 to 1

Q

What are oligodendrocytes?

A

form myelin sheaths

Q

What are ependymal cells?

A

line the cavities of the brain

Q

What are the for types of neuroglia?

A

microglia, astrocytes, schwann cells, and satellite cells

Q

What is the myelin sheath?

A

insulating layer around nerve fiber

Q

What does the regeneration tube do?

A

guides growing sprout back to target cells

Q

What is resting membrane potential?

A

charge difference acres the plasma membrane

Q

What is action potential?

A

dramatic change

Q

What are local potentials?

A

disturbances in membrane potential