Question

What is the normal resting level of lactic acid circulating in the blood?

A. 0.5-1.5 mmol/L
B. 2-4 mmol/L
C. 5-7 mmol/L
D. 8-10 mmol/L

Answer 1

The normal resting level of lactic acid in the blood is 0.5-1.5 mmol/L, which falls within the tightly regulated blood pH range necessary for healthy metabolic function.

Step-by-step explanation:

The normal resting level of lactic acid circulating in the blood is A. 0.5-1.5 mmol/L. The blood pH is maintained within a very narrow range of 7.35 to 7.45 under normal physiological conditions, ensuring proper metabolic function. A blood pH below 7.35 is considered acidosis and can cause symptoms like headache and confusion, while a pH above 7.45 is considered alkalosis, which can lead to symptoms such as cognitive impairment and nausea.