pH of Blood

pH of Blood, Urine & Connective Tissue

The key to understanding pH is simple: pH, or the degree of acidity and alkalinity of a solution is measured on a logarithmic scale of 1 to 14. Anything with a pH value of less than 7.0 is considered acidic. The lower the number of pH, the greater the acidity. The higher the number of pH, the greater the degree of alkalinity or baseness. Anything with a pH of greater than 7.0 is considered alkaline or base.

pH of Blood

The bloodstream is the most critically buffered system of the entire body, far more sensitive than any other. Arterial and venous blood must maintain a slightly alkaline pH: arterial blood pH = 7.41 and venous blood pH = 7.36. Because the normal pH of arterial blood is 7.41, a person is considered to have acidosis when the pH of blood falls below this value and to have alkalosis when the pH of blood rises above 7.41.

Range of Arterial pH Values

Range of Arterial pH Values

 

pH Of Interstitial fluids And Connective Tissue

A normal pH in these areas is 7.34 and 7.40, a slightly more acid profile, because body cells dump as much free hydrogen (H+) as possible, buffering the blood as much as possible. However, pH in these areas can dangerously drop to concentrations of pH = 5.0.

pH of Urine

In a pH balanced body, urine is slightly acid in the morning, (pH = 6.5 – 7.0) generally becoming more alkaline (pH = 7.5 – 8.0) by evening in healthy people primarily because no food or beverages are consumed while sleeping. Whereas, during the day the body buffers the pH of the food and beverages consumed by releasing electrolytes and the pH level goes up. This process allows the kidneys to begin the elimination process slowly.

Outside the range implies that cells are being burdened with caustic pH fluids within and without surroundings. Long term experience outside this range is unhealthy. However, the pH of urine can range from an extremely unhealthy low of 4.5 to a high of 8.5, which it tolerates a little easier, depending on the acid/base status of the extracellular fluids. A high pH value may indicate the body is over buffering to compensate for a physiological system that is too acidic.

Range of Urine pH Values

Range of Urine pH Values

Generally, when urine pH is 6.0 and below for extended periods of time, it is an indication that the body’s fluids elsewhere are too acid, and it is working overtime to rid itself of an acid medium. Thus, when pH of urine is normal, then the pH of blood is normal, but when the urine pH is overly acid, the body releases too many electrolytes to keep the pH level normal and maintain life.
Easy to take urine buffer test strips are available to indirectly determine the safety of all body fluids, including the pH of blood.

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