Chart 29-6 · 14 min
Polarized
A read of this page, with the plate.
Three pictures. At rest, polarized. Stimulus, sodium in, depolarized. Calcium closes the gate, potassium returns. Too much potassium outside: cramps toward a convulsion — a physician. Too little: weakness after a loss of fluid — a name, not a scoop. Too little sodium: a collapse as her sentence — a physician. Low calcium: gates stay open, twitches. Magnesium, vitamin E as names. Samples of sodium, potassium, calcium stay off the screen. A number belongs with a physician.
Her voice, from the class.
Polarized — sodium in, potassium out, depolarized then restore
Polarized — too much / too little potassium and sodium
Polarized — calcium guards the sodium gate at rest
Practice
Walk rest, stimulus, back. If the room is a convulsion or a collapse, you stop.
Check
At rest the axon is:
- Depolarized — sodium in
- Polarized — potassium in, sodium out ✓
- A dose of salt
Stand in the charge.
Stimulus means:
- Calcium closes the gate
- Sodium gates open — sodium in — depolarized ✓
- Too little K⁺
Action potential.
Back to rest:
- Sodium stays in
- Calcium closes the gate — potassium returns — repolarized ✓
- A seizure kit
That's the work.
Too much K⁺ outside:
- Weakness
- Partial depolarize — cramps, spasms, convulsions ✓
- Low sodium
A convulsion belongs with a physician.
Too little K⁺:
- Convulsions from partial depolarize
- Weakness, loss of control ✓
- The coat
That's the work.
Too little sodium:
- Cramps from high K⁺
- A nervous-system collapse as her sentence ✓
- Myelin
A collapse belongs with a physician.
Calcium on the gate:
- Opens sodium in
- Insulator — guards — closes; low calcium, gates stay open, twitches ✓
- Is rubidium
That's the work.
Samples on this hour:
- Go on the tongue
- Stay off the screen — a number belongs with a physician ✓
- Are Sphingolin
The stop.
Recycled asks on Polarized:
- Stay as eight of ten
- Cut — none said polarized, depolarized, potassium, or gate ✓
- Are the vagus
Path’s cut.
If the room is a seizure:
- You prescribe potassium
- You stop ✓
- You wait for feeling
The stop.