Question 1

Which of the following best describes the relationship between the respiratory and circulatory systems in the process of gas exchange?

Accepted Answer

The circulatory system transports oxygen and carbon dioxide between the lungs and tissues, while the respiratory system is responsible for gas exchange with the external environment.

Question 2

Which of the following correctly lists the four processes involved in respiration and the organ systems they utilize?

Accepted Answer

Pulmonary ventilation (respiratory), external respiration (respiratory & circulatory), transport of respiratory gases (circulatory), internal respiration (circulatory)

Question 3

A patient inhales air through the nose. Which of the following correctly describes the order in which air passes through the respiratory system?

Accepted Answer

Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles → alveoli

Question 4

Which of the following is TRUE regarding the division between the upper and lower respiratory tracts?

Accepted Answer

The upper respiratory tract includes the nasal cavity, pharynx, and larynx; the lower respiratory tract includes the trachea, bronchi, bronchioles, and alveoli.

Question 5

Which of the following statements about the nasal cavity is correct?

Accepted Answer

The nasal cavity warms, moistens, and filters incoming air, and also contains olfactory receptors for smell.

Question 6

Which cartilage forms the bulk of the anterior wall of the larynx and is commonly referred to as the 'Adam's apple'?

Accepted Answer

Thyroid cartilage

Question 7

Which type of epithelium lines the trachea and is responsible for trapping and moving particles out of the respiratory tract?

Accepted Answer

Pseudostratified ciliated columnar epithelium with goblet cells

Question 8

As the respiratory tract branches from the trachea to the bronchioles, which of the following compositional changes occurs?

Accepted Answer

Cartilage decreases, smooth muscle increases, and the epithelium transitions from pseudostratified ciliated columnar to simple cuboidal.

Question 9

Which cell type in the alveolar wall is responsible for producing surfactant to reduce surface tension?

Accepted Answer

Type II alveolar cells

Question 10

What is the main function of alveolar pores?

Accepted Answer

To connect adjacent alveoli and equalize air pressure throughout the lung

Question 11

Which of the following best describes the structure of the respiratory membrane?

Accepted Answer

It is composed of alveolar epithelium, capillary endothelium, and their fused basement membranes.

Question 12

Which of the following is the main component of lung stroma?

Accepted Answer

Elastic connective tissue

Question 13

Which statement best describes the difference between pulmonary and bronchial circulation?

Accepted Answer

Pulmonary circulation carries deoxygenated blood to the lungs for oxygenation, while bronchial circulation supplies oxygenated blood to the lung tissue.

Question 14

Which of the following best describes the pleura and its significance?

Accepted Answer

The pleura consists of two layers (parietal and visceral) that reduce friction and allow the lungs to expand and recoil during breathing.

Question 15

During normal quiet inspiration, which muscles are primarily responsible for increasing thoracic volume?

Accepted Answer

Diaphragm and external intercostal muscles

Question 16

According to Boyle's Law, what happens to the pressure of a gas if the volume of its container increases, assuming temperature remains constant?

Accepted Answer

Pressure decreases as volume increases, following $$P_1V_1 = P_2V_2.$$

Question 17

Which of the following is the major source of airway resistance in the respiratory system?

Accepted Answer

Medium-sized bronchi

Question 18

What is the effect of increased airway resistance on airflow, and what is the nature of their relationship?

Accepted Answer

Airflow decreases as resistance increases; this is an inverse relationship.

Question 19

Which substance is produced by the body to reduce alveolar surface tension and prevent alveolar collapse?

Accepted Answer

Surfactant

Question 20

A patient at high altitude is experiencing shortness of breath. Which law explains the decrease in partial pressure of oxygen in the atmosphere at higher elevations?

Accepted Answer

Dalton's Law: $$P_{total} = P_1$ + P_2$ + P_3$ + ...$$

Respiratory System and Acid-Base Balance: Study Guide for Anatomy & Physiology II (Chapters 22 & 25)

Guida di studio - Domande di pratica

Study guide - Flashcard