Fear or excitement, generally causes one to breathe rapidly...

Name: Problem 45, Chapter 7: Objective Chemistry for NEET
Uploaded: 2021-10-15T06:40:49-08:00
Duration: 1 min 1 s
Channel: Narayan Hari
Description: Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of CO2 concentration in blood. In what way will it change the pH of blood? (a) pH will increase (b) pH will decrease (c) No change (d) pH will adjust to 7

Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of $\mathrm{CO}_{2}$ concentration in blood. In what way will it change the $\mathrm{pH}$ of blood?
(a) pH will increase
(b) pH will decrease
(c) No change
(d) $\mathrm{pH}$ will adjust to 7

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Key Concepts

Acid-Base Balance

Acid-base balance refers to the mechanisms by which the body maintains the proper pH in the blood. It involves a complex interplay between the respiratory system, which adjusts CO2 levels, and the renal system, which modulates bicarbonate concentration, ensuring that the pH remains within a narrow range essential for physiological functions.

Bicarbonate Buffer System

The bicarbonate buffer system is a primary mechanism for maintaining blood pH, involving the reversible reaction between carbon dioxide (CO2), water, carbonic acid, and bicarbonate. Changes in CO2 due to variations in respiratory rate can shift this equilibrium, thereby altering the hydrogen ion concentration and, consequently, the pH of the blood.

Respiratory Alkalosis

Respiratory alkalosis is a condition that occurs when hyperventilation leads to a decreased CO2 concentration in the blood. This reduction in CO2 shifts the bicarbonate buffer equilibrium, lowering hydrogen ion concentration and causing an increase in blood pH, making the blood more alkaline.

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