How can we help?

You can also find more resources in our Help Center.

63 terms

A & P Nervous System

STUDY
PLAY
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
axon
nodes
neurolemma
axon hillock
dendrites (receivers)
cell body
satellite cells