A & P Nervous System

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messaging system

nervous function that is the fastest message system in the body

homeostatic

nervous function that is the major regulator and helps keep the heart at a normal rate

integrator of information

nervous function that decides what to do

sensory input

nervous function that helps you know what is going on in the environment

reactor

nervous function that decides how to react with the environment and give the body environmental cues

reflexes

nervous function that controls reflexes

neuroglia

supporting cells that help neurons (astrocytes, satellite cells, microgilia, oligodendrocytes, schwann cells, ependymal cells)

peripheral nervous system

PNS

CNS

What portion of the nervous system includes brain and spinal cord?

CNS

What portion of the nervous system has more supporting cells?

PNS

What portion of the nervous system includes somatic, Nerves, and ANS?

PNS

What portion of the nervous system has schwann and satellite cells?

CNS

What portion of the nervous system has astrocytes, oligodendrocytes, ependymal, microglia cells?

schwann cells

What type of cell makes myelin, makes the speed of impulse faster, is a great insulator, and is found along the axon?

satellite cells

What type of cell looks like a moon, wraps around the cell body, and monitors health?

astrocytes

What type of cell is the most common cell type, looks like stars, has big feet, and helps maintain blood-brain barrier?

ependymal cells

What type of cell maintains the blood-brain barrier, looks like epithelial cells, forms lining, and is specialized CSF?

oligodendrocytes

What type of cell makes myelin, acts as an insulator, increases the speed process of the impulse, and can mylinate multiple axons?

microglin

What type of cell creates an immune system for the brain?

afferent (sensory) neurons

What directional cell type sends messages to the CNS?

efferent (motor) neurons

What directional cell type sends messages from the CNS to the PNS?

Internerons (assoulation) neurons

What directional cell type connects afferent to efferent and is found in the CNS?

multipolar

What type of structural neuron has lots of dendrites?

bipolar

What type of structural neuron is rare and is in the eye?

unipolar

What type of structural neuron are sensory neurons?

anaxonic

What type of structural neuron has an axion (one extension)?

rechargeable battery

The plasma membrane is like a ___________.

physiology of impulse

When cells can generate a potential or energy it is called __________.

potassium (K+)

The resting membrane potential is mostly determined by ______.

resting membrane potential

How excitable a cell is is known as __________.

potassium

potential energy in the physical properties of ions comes from _____.

volts

potential energy is measured in _______.

current

When a sodium gate opens _______ is being generated.

resistance

The fatter the wire the faster the __________flow.

resistance

_________ is measured in Ohom's.

sodium

current in the physical properties of ions comes from ______.

amps (I)

Current is measured in ______.

energy

the flow of electrical particles that are ions create _______.

mechanical

What Na+ gate needs to be poked, prodded, or squeezed to function?

mechanical

What Na+ gate manually opens?

chemical gates (or ligand gates)

What Na+ gate needs to bind with a chemical to open?

voltage

What Na+ gate will only open if it feels a ionic charge come on?

voltage

What Na+ gate will you only find in the trigger zone (axon hillock)?

graded potential

Occurs in the axon hillock and is a special response grading how many gates to open.

depolarization

losing polarity, when the gates open

repolarization

when the gates go back to normal, the resetting back up again

action potential

a short event in which electrical membrane potential of a cell rapidly rises and falls

bidirectional

Graded potentials are ________ because they go in two directions.

incremental

Graded potentials are _________ because they fade away and die down.

slow

Graded potentials have relatively ________ messages.

chemical or mechanical

Graded potentials can have _________ or __________ gates.

dendrites and soma

Graded potentials occur in the ________ and __________.

synaptic knob

telodendria

axon terminals (transmitters)

schwann cells

neurolemma

axon hillock

dendrites (receivers)

satellite cells

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