SCIENCE
CIRCULATORY SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Absorption
|
|
|
Digestion
|
|
|
Buffer action
|
|
|
Perspiration
|
Detailed explanation-1: -The pH of blood is maintained at 7.4 by the carbonic acid – bicarbonate ion buffering system.
Detailed explanation-2: -Buffers in the Human Body Together they help maintain the bloods pH at 7.4. If blood pH falls below 6.8 or rises above 7.8, one can become sick or die. The bicarbonate neutralizes excess acids in the blood while the carbonic acid neutralizes excess bases.
Detailed explanation-3: -pH of our blood is about 7. 4. It remains constant because it is a buffer.
Detailed explanation-4: -Buffers work by neutralising any added acid (H+ ions) or base (OH-ions) to maintain the moderate pH, making them a weaker acid or base.
Detailed explanation-5: -Human blood contains a buffer of carbonic acid (H2CO3) and bicarbonate anion (HCO−3) in order to maintain blood pH between 7.35 and 7.45, as a value higher than 7.8 or lower than 6.8 can lead to death. In this buffer, hydronium and bicarbonate anion are in equilibrium with carbonic acid.