Topic 3 Flashcards

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1
Q

What is neuron cells have?

A

Dendrites, cell bodies, axons, axon-terminals, (sometimes) myelin sheath

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2
Q

What does the axon do?

A

-extension of cytoplasm
-impulses travel down it
-transmit info to effector organ or neuron

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3
Q

What is myelin?

A

White fatty materials, acts as insulator
In PNS formed by Schwann cells
In CNS formed by **

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4
Q

Grey Vs. White matter

A

Grey matter: non-myelinated areas
White matter: myelinated areas

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5
Q

Def: Ganglia

A

Cluster of neuron cells

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6
Q

3 types of neurons and functions

A

-Sensory(afferent in CNS AND PNS): Relays info received by sensory receptors to CNS
-Interneurons(association in CNS): link between both.
-Motor(efferent in CNS AND PNS): Nervous system to effector (produces physiological response like muscle contraction)

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7
Q

Reflex arc

A

Stimulus—>sensory neuron—>interneurons—>motor neurons—>effector

All happens in spinal cord except first and last!

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