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Chapter 10: Problem 2

Which of the following anatomical structures is at the site of respiratory gas exchange? a. pharynx b. nasal cavity c. alveoli d. bronchi

Short Answer

Expert verified
Answer: Alveoli

Step by step solution

01

Understand the anatomical structures

First, let's have a brief understanding of the anatomical structures listed: a. Pharynx: The pharynx is a part of the throat behind the mouth and nasal cavity. b. Nasal cavity: The nasal cavity is the large, air-filled space above and behind the nose in the middle of the face. c. Alveoli: The alveoli are small sacs found in the lungs where gas exchange occurs. d. Bronchi: The bronchi are the main passageway into the lungs, branching from the trachea.
02

Analyzing the functions of the structures

Now let's consider the functions of these structures in the context of the respiratory system: a. The pharynx serves as a pathway for both air and food, but its function is not gas exchange. b. The nasal cavity warms, moistens, and filters air before it reaches the lungs, but gas exchange does not occur here. c. The alveoli are the site where oxygen from inhaled air diffuses into the bloodstream, and carbon dioxide from the blood diffuses into the alveoli to be exhaled. This process is called gas exchange. d. The bronchi serve as passageways for air to reach the lungs, but they do not participate in actual gas exchange.
03

Choose the correct answer

Based on the functions of these anatomical structures, we can conclude that the site of respiratory gas exchange is: c. Alveoli

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Most popular questions from this chapter

Gas moves from an area of \(--------\) partial pressure to an area of \(--------\) partial pressure. a. low: high b. low: low c. high: high d. high: low

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The partial pressure of carbon dioxide is \(45 \mathrm{~mm} \mathrm{Hg}\) in the blood and \(40 \mathrm{~mm} \mathrm{Hg}\) in the a lveoli. What happens to the carbon dioxide? a. It diffuses into the blood. b. It diffuses into the alveoli. c. The gradient is too small for carbon dioxide to diffuse. d. It decomposes into carbon and oxygen.
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