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Nervous System
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61
Anatomy
10th Grade
05/02/2011

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Term
What do Neurons do?
Definition
signals cells that communicate to the body common parts
Term
What is a Soma?
Definition
(Body) filled with ER that makes enzymes needed for cell communication
Term
What are Dendrites?
Definition
Receiver of communication from other neurons
Term
What is a Axon?
Definition
Cord like region that transmits signal to the end of the nerve
Term
What is a Terminus?
Definition
The end of the neuron that release neurotransmitters for cell communication
Term
What is a Synapse?
Definition
The space between neurons
Term
what are the 5 parts of the neuron
Definition
some, dendrites, axon, myelin sheath, terminus, synapse
Term
What is a Neuroglia?
Definition
cells that support and protect neurons- made of liquids
Term
What does the Presynaptic Neuron do?
Definition
Nerve SENDING the signal
Term
What does a Postsynaptic Neuron do?
Definition
The nerve RECEIVING the signal
Term
what does a Afferent Nerve do?
Definition
Sensory from the BODY to the BRAIN
Term
What does the Efferent Nerve do?
Definition
Sensory from the BRAIN to the BODY
Term
Order of Neuron Layers?
Definition
Axon, Endoneurium, Perineurium, Epineurium
Term
what does the Endoneurium do?
Definition
ct that surround each axon, separates each axon so they don't interfere, also supplies nutrience and electriods
Term
What does the Perineurium do?
Definition
Dense layer of cells that assists with diffusion of ions needed for action potential
Term
what does Epineurium do?
Definition
protective layer of nerve around the cell
Term
What is resting potential?
Definition
unstable state, waiting to communicate
Term
Is sodium potential high or low inside the cell during resting potential?
Definition
Low
Term
Is sodium potential high or low outside the cell during resting potential?
Definition
high
Term
Is potassium concentration high or low inside the cell during resting potential?
Definition
high
Term
What is action potential?
Definition
sodium potassium channels open up allowing ions to flow, message travels down neurons
Term
what does a excitatory Neurotransmitter do?
Definition
helps reach threshold easier to produce active potential
Term
What do inhibitory neurotransmitters do?
Definition
prevent reaching threshold
Term
what are the 4 stages of Neurotransmitters
Definition
Synthesis, Storage, Calcium enters, Releases transmitter binds
Term
What is reflex arc?
Definition
action with out involvement of brain
Term
what does the sensory neuron do?
Definition
Sends signal to the interneuron
Term
what does the Interneuron do?
Definition
connects to the motor neuron and brain
Term
what does the motor neuron do?
Definition
sends signal to the effector to make motion of reflex
Term
what does the affector do?
Definition
signals the sensory neuron
Term
what is a effector?
Definition
muscle that make the action of reflex arc
Term
what are the 3 meninges?
Definition
Dura, Arachoid, Plamatter
Term
What is White matter?
Definition
Consentration of AXON and NEUROGLIA, Thick outer covering of spinal cord
Term
What is Gray matter?
Definition
consentration of NEURON BODIES, distributed on outside of brain and inside of spinal cord
Term
what does the cerebrum do?
Definition
controls emotions, memory, and motor movements
Term
right side of the brain?
Definition
art, creativity, music
Term
left side of the brain?
Definition
Logic,math
Term
what is corpus collosum?
Definition
white matter connecting the two hemespheres
Term
what does Motor Cortex do?
Definition
voluntary skeletory muscle control
Term
what is the forebrain?
Definition
anterior part of brain
Term
What is the Hindbrain?
Definition
posterior part of the brain
Term
what does the medulla work with?
Definition
involuntary body function
Term
what does the temporal lobe work do?
Definition
transmits sensory info to the body
Term
what does the cerebellum work with?
Definition
the posture and body movement
Term
What does the cornea do?
Definition
focuses light to the lens, protects eye
Term
what is the sclera?
Definition
white part of the eye that connects to muscles
Term
what does the iris do?
Definition
(colored part) controls amount of light that enters eye
Term
What is the pupil?
Definition
black part of eye where light enters
Term
what does the lens do?
Definition
focus light on the retina
Term
what does the retina do?
Definition
neural layer of eye containing photorecepters
Term
what vision does a rod do?
Definition
black and white vision
Term
what vision does a cone do?
Definition
color vision
Term
right controls _____?
Definition
left
Term
Left controls __________?
Definition
right
Term
What causes color blindness?
Definition
Cones
Term
What causes nearsighted?
Definition
focus in-front of the retina
Term
what causes farsighted?
Definition
focus behind of the retina
Term
what is somatic
Definition
voluntary control
Term
what is autonomic?
Definition
involuntary control
Term
What does parasympathetic do?
Definition
rest to digest, relaxes heart rate
Term
what is sympathetic?
Definition
fight or flight, body response to stress, more air, pupils dilate
Term
5 tastes?
Definition
Bitter, salt, sour, sweet, umani
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