Term
| Central Nervous System (CNS) |
|
Definition
|
|
Term
| Peripheral Nervous System (PNS) |
|
Definition
| nerves arising from brain and spinal cord |
|
|
Term
|
Definition
aka Sensory Division
-incoming sensory pathways
-sense ograns to CNS
-interneuron |
|
|
Term
|
Definition
| connects afferent and efferent, lies entirely within the CNS |
|
|
Term
|
Definition
aka motor divison
-outgoing motor pathways
-CNS to muscles or glands
-somatic nervous system
-autonomic nervous system |
|
|
Term
|
Definition
| voluntary; carries info to skeletal muscles |
|
|
Term
|
Definition
involuntary; carries into to smooth muscles, glands and cardiac muscle
-sympathetic
-parasympathetic |
|
|
Term
|
Definition
| prepares body for "flight or fight" |
|
|
Term
|
Definition
coordinates body's normal resting activities
-ex: digestion |
|
|
Term
|
Definition
simplest concept of impulse conduction
-receptor
-sensory neuron
-interneuron
-motor neuron
-effector |
|
|
Term
|
Definition
| wave of electrical fluctuation that travels along a plasma membrane |
|
|
Term
|
Definition
difference in eletrical charge across plasma membrane of a neuron
-polarized |
|
|
Term
|
Definition
| term referring to a neuron that has membrane potential |
|
|
Term
| Resting Membrane Potential |
|
Definition
| when a nerve isnt conducting an impulse; -70 mV |
|
|
Term
|
Definition
| open in response to voltage fluctuation; ex: sodium-potassium pump |
|
|
Term
|
Definition
| membrane potential of an active neuron, aka nerve impulse, all-or-none response |
|
|
Term
| Stages/steps of a nerve impulse |
|
Definition
-stimuli causes Na+ to come into cell
-influx causes adjacent gates to open, creating a nerve impulse
-depolarization occurs |
|
|
Term
|
Definition
| after impulse, membrane moves back to resting membrane potential; must occur before a new impulse is detected |
|
|
Term
| Relative Refractory Period |
|
Definition
| milliseconds after impulse, membrane is repolarizing, will only respond to a very strong stimulus |
|
|
Term
|
Definition
| work by inhibitng the opening of the sodium channels, thus inhibiting the impulse |
|
|
Term
| __ _______ ions are pumped ____ of the neuron for every __ _______ ions pumped ____ the neuron |
|
Definition
3
sodium
out
2
potassium
into |
|
|
Term
|
Definition
| type of impulse conduction where impulse "jumps" from Node of Ranvier to Node of Ranvier |
|
|
Term
| The _______ the diameter of a nerve the _______ the impulse |
|
Definition
|
|
