Electricity in the body Flashcards
(20 cards)
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
What are the four ways that electricity is used within healthcare
- Defibrillator
- Diathermy
- pacemaker
- Transcutaneous electrical nerve stimulator
What does a Defibrillator do
assists with fibrillation.
Depolarizes the heart cells to return it to normal rhythm
What does Diathermy do
high frequency electrical current that cuts through tissue or causation of the blood vessels
What does a pacemaker do
pulse generator that produces pulses of current to stimulate the heart
what does transcutaneous electrical nerve stimulator do
assists in alleviating labour pains by blocking or interfering with transmission of sensory information (Pain) by stimulating the sensory nerves.
