2. in psychiatry, an unconscious defense mechanism in which unacceptable ideas, fears, and impulses are thrust out or kept out of consciousness. 3. gene r. enzyme repression interference, usually by the endproduct of a pathway, with synthesis of the enzymes of that pathway. gene repression the inhibition of gene transcription of an operon; in prokaryotes repressor binding to the operon is involved.
The ratio of intracellular to extracellular potassium determines neuromuscular and cardiovascular excitability, which is why serum potassium is normally regulated within a narrow range of 3.5 to 5.0 mmol/L. Dietary K+ intake is highly variable, ranging from as low as 40 mmol/day to more than 100 mmol/day.
So, theyâre the most abundant cations in the body and have an inverse relationship in regards to intracellular and extracellular concentrations. So, if you remember potassiumâs normal value is 3.5 â 5.0 and it is primarily located within the cell. And then, sodium is primary located outside of the cell. And your sodium levels, the normal is 135 â 145. So, the mnemonic to help you remember this is PISO. PISO. Potassium in the cell.