Chapter 34, Problem 20A

Summary Introduction

Introduction:

The respiratory system is the link between the tissues and the bodies that regulate our respiration. The airways, lungs, and blood vessels are our elements. Additional elements of the respiratory system are the muscles that reinforce our lungs. Both sections work together to help our bodies consume air-borne oxygen, and so our bodies can work. It also cleanses waste gases from our tissue, for example, carbon dioxide. Allergies, allergies, or viruses are serious disorders. The process of pumping blood oxygen is internal respiration, which is guided to the cells and into the interstitial fluid. Waste and carbon dioxide are also diffused the other direction, from the cells to the blood.

Answer to Problem 20A

Correct answer:

The correct answer is option (B) exhalation.

Explanation of Solution

Explanation/justification for the correct answer:

Option (B) exhalation. During exhalation, the lungs pull back to force the air out of the lungs. The intercostals muscles relax, returning the chest wall to its real position. During exhalation, the diaphragm additionally relaxes, moving higher into the thoracic cavity. So, the correct answer is option B.

Explanation for incorrect answer:

Option (A) cellular respiration. Cellular respiration is the aerobic method via which living cells are broken down glucose molecules, release energy, and produce ATP molecules. It is not related to the diaphragm. So, this is an incorrect answer.

Option (C) inspiration. During inspiration, the diaphragm contracts and pulls downward at the same time as the muscles between the ribs compact and pull upward. So, this is an incorrect answer.

Option (D) internal respiration. Inner respiration occurs in the metabolizing tissue cells, in which oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells. These tissues are present all over the body. So, this is an incorrect answer.