Chapter 37, Problem 6STP

Summary Introduction

Introduction:

The alveoli are present there where during the breathing and respiration process, the lungs and blood exchange oxygen and carbon dioxide.

Answer to Problem 6STP

Correct answer:

The correct answer is option (A) carbon dioxide and oxygen are exchanged.

Explanation of Solution

Explanation/justification for the correct answer:

Option (A) carbon dioxide and oxygen are exchanged. Carbon dioxide and oxygen are exchanged in alveoli that are in the given structure. They are tiny balloon shaped structures in the respiratory system. Although, they are microscopic they are the workhorse of our respiratory system. So, the correct answer is option (A).

Explanation for incorrect answer:

Option (B) carbon dioxide and oxygen remain constant. The carbon dioxide and oxygen are exchanged in alveoli that are in the given structure. So, it is incorrect.

Option (C) Nitrogen and carbon dioxide are exchanged. The nitrogen and carbon dioxide do not exchange in the heart. So, this is an incorrect option.

Option (D) Nitrogen and carbon dioxide remains constant. The nitrogen and carbon dioxide do not remain constant in the heart. So, this is an incorrect answer.