RESTING POTENTIAL & ACTION POTENTIAL

Membrane resting potential is -70 mV ( millivolts ) . Threshold value is -50 mV . Threshold value is the lowest level of stimulus that will trigger an action potential ( nerve impulse ) . During hyperpolarisation , the inside membrane of axon becomes more negative which is below -70 mV to about -80 mV . When after-hyperpolarisation or undershoot , the resting potential value ( -70 mV) of membrane axon  is re-establish .

MYOCARDIAL INFARCTION ( HEART ATTACK )

Prevention

You can help to prevent a heart attack by:

1. Have a healthy balance diet low in saturated fats , LDL cholesterol & trans fat .

2. Have sufficient antioxidant vitamins : A, C , E .

3. Eat enough fruit , fresh vegetables & soluble fibres .

             

4 . Taken less salt food products .

5 . Have sufficient vitamin B6 ,B12 and folic acid to help to prevent an elevated  

     level of homocysteinein the blood & decrease the risk of myocardial infarction .

6 . Exercise regularly.

7 . Maintaining a healthy weight

8 . Not using tobacco products  : do not smoke cigarette .
 

9 . Have a healthy lifestyle : Learn to manage stress , do not taking drugs & don't

     drink alcohol excessively .

10 . Controlling your blood pressure .