Oxygen: Lungs And Respiratory System! Trivia Questions Quiz

The nasal cavity performs several functions to prepare the air we breathe. It moistens the air by adding moisture to it, warms the air by transferring heat from the blood vessels in the nasal cavity, and cleans the air by trapping particles and filtering them out. However, it does not cool the air. Instead, the air is warmed as it passes through the nasal cavity.

The lower respiratory tract can be compared to the structure of a tree. Just like a tree has branches that divide into smaller branches and ultimately lead to leaves, the lower respiratory tract consists of the bronchi, bronchioles, and alveoli that branch out and become smaller as they go deeper into the lungs. This branching structure allows for the efficient exchange of gases in the lungs, similar to how a tree's branches allow for the efficient exchange of nutrients and gases with the environment.

The trachea, bronchi, and bronchioles are part of the conducting airways in the respiratory system. These structures are responsible for conducting air from the outside environment to the lungs. The term "anatomic dead space" refers to the portion of the respiratory system where air does not participate in gas exchange with the blood. This includes the conducting airways, as they do not have the necessary structures for gas exchange to occur. Therefore, the statement that the trachea, bronchi, and bronchioles constitute the anatomic dead space is true.

The volume of air within the conducting airways of an average adult is about 150ml. This is because the conducting airways refer to the air passages that carry air to and from the lungs, such as the trachea, bronchi, and bronchioles. These passages are relatively narrow and do not contribute significantly to the overall lung volume. Therefore, the volume of air within these airways is relatively small, around 150ml.

The respiratory zone refers to the alveolated region of the lungs, where gas exchange takes place. This region makes up the majority of the lung volume, approximately 2.5 to 3 liters. Therefore, the statement that the respiratory zone is the location of gas exchange and constitutes the majority of lung volume is true.

The length, diameter, and compliance of the respiratory tract play a crucial role in determining the flow of air. A longer respiratory tract would offer more resistance to the airflow, reducing its velocity. Similarly, a narrower diameter would also increase resistance and decrease airflow. Compliance refers to the ability of the respiratory tract to expand and contract, affecting the ease with which air can flow through it. Therefore, all these factors collectively influence the flow of air in the respiratory tract, making the statement true.