Concept:The pH scale measures the acidity or basicity of a solution, and human blood has a specific narrow normal range.
Explanation:The pH scale ranges from 0 to 14.
A pH of 7 is considered neutral.
Values below 7 indicate an acidic nature.
Values above 7 indicate a basic or alkaline nature.
Human blood is slightly basic in nature.
The normal pH range of human blood is strictly maintained between
7.36 and
7.42.
This narrow range is critical for the proper functioning of enzymes and various metabolic processes in the body.
Any significant deviation from this range can lead to conditions like acidosis or alkalosis.
Among the given options, option A (
6.0 to
6.4), option C (
6.4 to
6.95), and option D (
7.8 to
8.0) are all outside the normal physiological range of blood.
Only option B falls within the acceptable normal range.
Answer:Option B:
7.36 to
7.42.