How is blood pH relatively stable?

There are many substances in the blood that buffer the pH - buffer substances, and each pair of buffer substances is composed of a weak acid and a corresponding strong alkali salt. Such as: H2CO3 NAHCo3.

To maintain the stability of blood pH, the diet should be reasonable: the food should be diverse, cereals, beans, vegetables and fruits, as well as animal foods and oils.

Summary. 1.Insist on oxygenation to bring out the carbon dioxide in the water by convection.

2.Mixing water: As mentioned earlier, normal tap water itself is weakly alkaline, and mixing it with water can dilute the acidity of the water.

3.Plants: Plants can absorb ammonia formed from waste products and food scraps produced by fish metabolism, resulting in less nitric acid and nitrite due to nitrification.

However, it should be noted that decaying plants will produce large amounts of nitrite in a short period of time, causing the pH of the water to change rapidly.

1.Insist on oxygenation to bring out the carbon dioxide in the water by convection. 2.

Mixing water: As mentioned earlier, normal tap water itself is weakly alkaline, and mixing it with water can dilute the acidity of the water. 3.

Plants: Plants can absorb ammonia from the waste and food scraps produced by fish metabolism, thereby reducing the amount of nitric acid and nitrous acid produced by nitrate. However, it should be noted that decaying plants will produce large amounts of nitrite in a short period of time, causing the pH of the water to change rapidly.

What raw materials to add to maintain the pH value when the pH value is weakened.

Add baking soda sodium bicarbonate.

Because there are buffer pairs of substances in the body's internal environment, for example, the pH of the blood can be kept relatively stable.

The pH of normal human plasma is: The relative constancy of plasma pH depends on the buffers in the blood and normal lung and kidney function. The buffer material of plasma includes three main buffer pairs: NaHCO3 H2CO3, protein sodium salt and protein NA2HPO4 and NAH2PO4, among which NAHC3 H2CO3 is the most important.

There are also buffer pairs of hemoglobin potassium salt, hemoglobin, oxyhemoglobin potassium salt, oxyhemoglobin, K2HPO4, KH2PO4, KHCO3, H2CO3, etc., which are involved in maintaining the constant plasma pH value in red blood cells. When acidic or alkaline substances enter the bloodstream, the buffer substances in the plasma can effectively reduce the effect of acids or alkaline substances on the plasma pH value, especially when the lungs and kidneys maintain the normal function of excreting excess acids or alkalis from the body, and the plasma pH value fluctuates in a very small range.

There are buffer pairs in the human body that maintain acid-base balance.

pH is a number between 0 and 14, when pH < 7, the solution is acidic, when pH > 7, the solution is alkaline, and when pH = 7, the solution is neutral.

The pH of normal human blood is -

Under normal conditions, the pH value of the body should be maintained at between, that is, slightly alkaline.

Introduction to blood pH:

Blood pH is the negative logarithmic value of the concentration of hydrogen ions in the blood. All intracellular biochemical changes are affected by the pH of the blood. When the pH of the blood is below or above, it is life-threatening. Arterial blood is usually taken and tested without contact with air.

Blood pH Normal Value:

or H concentration: 36 44 nmol L).

Venous blood:. Blood pH Clinical Significance:

1.Elevated blood pH: suggests decompensated alkalosis.

1) Respiratory alkalosis: caused by excessive ventilation, such as central nervous system diseases with increased excitability of the respiratory center.

2) Metabolic alkalosis: often caused by taking too much alkali or losing too much acid, such as long-term vomiting.

2.Decreased blood pH: suggests decompensated acidosis.

1) Respiratory acidosis: mainly due to the dysfunction of lung carbon dioxide excretion, such as respiratory muscle paralysis, lung diseases such as pulmonary edema, obstructive pulmonary disease, status asthmaticus, etc.

2) Metabolic acidosis: excessive acid production in the body, such as diabetic ketoacidosis, starvation acidosis; Renal excretion, such as uremia; Excessive loss of alkali, such as chronic diarrhea; Taking too many acidic medications.

3.Blood pH is normal, and there can be three conditions: no acid-base imbalance, compensatory acid-base imbalance, or complex acid-base imbalance. To distinguish whether it is respiratory, metabolic, or a combination of the two, it is necessary to make a comprehensive judgment in combination with other relevant indicators.

The pH of plasma in normal people is between.

It can be kept in such a narrow range mainly because there are several important buffer pairs in plasma and red blood cells, such as sodium bicarbonate (chemical formula NaHCO3) and carbonic acid (chemical formula H2CO3) in plasma, protein sodium salt, protein, sodium hydrogen phosphate dibasic (chemical formula Na2HPO4) and sodium phosphate monobasic (NaH2PO4), as well as hemoglobin potassium salt and hemoglobin in red blood cells, etc., these buffers can greatly reduce the influence of general acid-base substances on plasma pH.

If you have studied buffer solution in chemistry, it is easy to understand, buffer solution refers to a mixed solution composed of weak acid and its salt, weak base and its salt, which can offset and reduce the influence of external reinforcing acid or strong base on the pH of the solution to a certain extent, so as to keep the pH value of the solution relatively stable.

Hello, 1The vast majority of cells in the body are not in contact with the outside world, but are immersed in the extracellular fluid inside the body, so the extracellular fluid is the environment in which the cells are in direct contact and rely on to survive. In physiology, the body fluids that surround the cells in the body of multicellular animals, the extracellular fluid, are called the internal environment of the body.

2.Blood is the most active part of the body's extracellular fluid, circulating in the cardiovascular system and communicating with other extracellular fluids. The content of water, salts, nutrients, osmotic pressure, temperature and the number of blood cells in the blood are relatively constant, all of which are the material basis for maintaining a relatively stable internal environment, and are also necessary conditions for maintaining tissue excitability and normal functional activities of organs throughout the body.

Histiocytes can continuously discharge the heat, water, CO2 and other metabolites produced in the metabolic process into the surrounding tissue fluid, but the flow range of tissue fluid is very limited, and it must be transported by blood in time to avoid excessive accumulation of these substances and cause damage to tissue cells, so as to maintain the normal progress of body activities. It has been determined that the daily caloric production of the human body is about 12kj, so these calories can be evenly distributed to all parts of the body and maintain body temperature, which is closely related to the movement of blood in the body and the heat capacity of plasma. For example, the acid produced by the cells in the body also enters the blood, and is excreted from the body due to the buffer substances in the blood, which are transported to the lungs, kidneys and ** through the blood, so that the blood pH value remains relatively constant.

There are substances such as NaHCO3 in the blood, that is, acid-base pairs, which can regulate the pH value of the blood, NaHCO3 can release CO2 into Na2CO3, and Na2CO3 can also absorb CO2 into NAHCo3, so as to maintain the relative stability of blood pH. Of course, there are other acid-base pairs, which I won't repeat here.

In general, the mixture of weak acid or weak base and its salt (strong electrolyte) has a buffering effect, and the system with this effect is called the buffering system, and the blood contains many substances that act as a buffer to the pH, and each pair of buffering substances is composed of a weak acid and a strong alkali salt corresponding to the age of Qin, such as H2

co3nahco3

nah2po4

na2hpo4

so that the pH of the blood will not change greatly, so as to maintain a relatively stable state

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