Fluid and electrolyte balance and disturbances Flashcards
K+ is the major determinant what r/t cell excitability
RMP
Ca++ is the major determinant of what r/t cell excitability
threshold potential
Normal Ionic balance:
what is the normal rmp? and what controls it
-90
K+
Normal Ionic balance:
what is the normal threshold? and what controls it
-60
Ca++
point to the RMP
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/164/q_image_thumb.png?1470538266)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/164/a_image_thumb.png?1470538266)
Normal Ionic balance:
clearify
Muscle rmp is -90
Nerve is -70
just so i dont get confused
Normal Ionic balance:
point to the Threshold line
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/167/q_image_thumb.png?1470538267)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/167/a_image_thumb.png?1470538267)
Normal Ionic balance:
what one is HYPOkalemia
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/170/q_image_thumb.png?1470538269)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/170/a_image_thumb.png?1470538269)
Normal Ionic balance:
explain how you know it is hypokalemia and what it all means.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/171/q_image_thumb.png?1470538271)
- RMP HYPERpolarized (more negative)
- making it LESS excitable
- Moves away from threshold
- More of a stimulus if needed to exert an action
Normal Ionic balance:
Point to HYPERkalemia
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/172/q_image_thumb.png?1470538272)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/172/a_image_thumb.png?1470538272)
Normal Ionic balance:
explain how you know it is hyperkalemia and what it all means.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/173/q_image_thumb.png?1470538273)
- HYPOpolarized (less negative/closer to 0)
- RMP moves closer the threshold
- MORE excitable
- Less of a stimulus is needed to evoke a response
Normal Ionic balance:
what the hell can cause D? and what is going on?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/174/q_image_thumb.png?1470538274)
- the RMP has past the threshold
- Cardioplegia solution
- Hyperkalemia
- Na+ channel snaps open
- causes absolut refractory period b/c Na+ channels can’t fire
- K+ levles = 15-40 mEq
Normal Ionic balance:
point to Hyper calcemia
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/176/q_image_thumb.png?1470538275)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/176/a_image_thumb.png?1470538275)
Normal Ionic balance:
explain how you know it is hypercalemia and what it all means.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/177/q_image_thumb.png?1470538276)
- Threshold is hypopolarzed
- moves closer to 0
- Decreased excitability
- bigger gap b/t rmp and threshold
- More stimulus is needed to elict a response
Normal Ionic balance:
what the hell if F showing?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/194/702/178/q_image_thumb.png?1470538277)
- hyperkalemia treated with Ca++
- the RMP is hypopolarized (hyperkalemia)
- the threshold is increased to decrease the excitability
- threshold increased