Electricity in the body Flashcards
State the RMP within a cell
increased negativity within the cell
-70mv
What are conc of potassium and NA within the cell
K inside: 100
K outside: 5
Na inside: 15
NA outside: 150
Describe what occurs when a action potential occurs
Stimulus= threshold.
Voltage gated na ions open= NA into the cell (depolaristion)
then Voltage gated k ions ion= repolarisation as K leaves the cell
Which metabolic process controls a action potential
the sodium potassium pump.
Action potential
breif electrical charge which is transferred down the neurons axon
Resting state
cell is in a polarised state: inside is more negative compared to the outside
Depolarisation
sodium channels open sodium rushes into the cell. Inside of the cell becomes more postive in regard to the outside
Repolarisation
K voltage ion channel open. K leaves the cell causing the inside the cells inside to become negative charges compared to the outside.
What does the P wave represent on a ECG
depolarisation of both atria
What does the Q wave represent on a ECG
excitation of the ventricular septum
What does the R wave represent on a ECG
spreading of excitation of right and left ventricular myocardium
What does the S wave represent on a ECG
completion of the ventricular depolarisation
What does the T wave represent on a ECG
repolarization of the ventricular myocardium
WHat are the consequences of electrocution
Burns - entry exit side
Muscle contraction- ability to stop someone from breathing
Arrhythmia/ Ventricular fibrilization
- possible could lead to death
Describe first aid with a suspected electrical shock
- access situation see if there is any danger of chance of electrical shock for yourself
- GET help
- Once it is safe to do so get defibrilator and rest the heart beat of the individual
- Treat burns
