What is a fire?
An impulse conducted from one end of a neuron to the other
What is resting state?
When a neuron is not being stimulated (active rest/ potential energy)
Sodium accumulates where?
On the outside of the cell
What is the usual negative resting membrane potential #
-70 mV (millivolts)
What happens during Depolarization?
Sodium channels open, sudden influx of sodium ions, resulting in loss of 2 distinct poles on either side of cell membrane
How does sodium move into the cell?
By charge attraction and by concentration gradient
What is action potential?
significant change in electrical charge from negative to positive
What happens during Repolarization?
The potassium gates open and allow for an influx of potassium to move outside of the cell, resulting in the gaining back of 2 poles
What needs to happen after repolarization?
Cell needs to use ATP to put the correct ions back in place (potassium on the inside and Sodium on the outside)
What is a threshold stimulus?
Stimulus of sufficient intensity to generate a nerve impulse
What is the all or nothing principle
Either the complete neuron depolarizes to its maximum strength or it does not depolarize at all
what is the refractory period
when a neuron is insensitive to new stimuli until it recovers from the pervious nerve impulse
if you have acidic to alkaline it becomes what?
more ionized, stays hydrophilic
weakly alkaline to acidic you get?
more ionized, hydrophilic
weakly alkaline to alkaline you have?
becomes lipophilic
Anything with an ion is?
Hydrophilic
if temperature increases what does pressure do?
increases
if temperature increases what does volume do?
increases
if volume increases what does pressure do?
Decreases
What are some gas laws?
No set shape of volume, expand to fill containers, travels at different rates based on temp, they move from high to low concentration, can be impacted by increasing pressure, they are in constant movement,