Gas Exchange in the Lungs: Interactive Learning Quizzes

Question 1

Which of the following is NOT a function of the respiratory system?

Accepted Answer

Filter blood

Answer

Gas exchange

Answer

Produce speech

Answer

Regulate body temperature

Question 2

The process of gas exchange in the lungs is primarily driven by:

Accepted Answer

Diffusion

Answer

Active transport

Answer

Bulk flow

Answer

Osmosis

Question 3

Which structure in the lungs produces surfactant?

Accepted Answer

Type II pneumocytes

Answer

Type I pneumocytes

Answer

Alveolar macrophages

Answer

Bronchial epithelial cells

Question 4

During respiration, inspiration serves to primarily:

Accepted Answer

Increase lung volume

Answer

Increase intrathoracic pressure

Answer

Decrease lung compliance

Answer

Expel carbon dioxide

Question 5

Which factor does NOT influence the rate of gas diffusion in the lungs?

Accepted Answer

Blood flow rate

Answer

Partial pressure gradient

Answer

Surface area

Answer

Thickness of gas exchange membrane

Question 6

The primary role of the respiratory centre in the medulla oblongata is to:

Accepted Answer

Control breathing rate and depth

Answer

Control heart rate

Answer

Regulate blood pressure

Answer

Maintain body temperature

Question 7

Which condition is a common cause of respiratory acidosis?

Accepted Answer

Hypoventilation

Answer

Hyperventilation

Answer

Metabolic acidosis

Answer

Renal failure

Question 8

Which condition is characterized by difficulty exhaling?

Accepted Answer

Emphysema

Answer

Asthma

Answer

Pneumonia

Answer

Tuberculosis

Question 9

A spirometer is primarily used for measuring:

Accepted Answer

Lung capacity

Answer

Respiratory rate

Answer

Tidal volume

Answer

Partial pressure of oxygen

Question 10

Describe the primary role of the diaphragm in the respiratory cycle.

Accepted Answer

Altering the volume of the thoracic cavity

Answer

Expanding the rib cage

Answer

Contracting the lungs

Answer

Regulating air flow in and out of the lungs

Question 11

Identify the mechanism NOT involved in transporting carbon dioxide in the blood.

Accepted Answer

Oxyhemoglobin

Answer

Carbaminohemoglobin

Answer

Bicarbonate ion

Answer

Dissolved gas

Question 12

Name the anatomical structure in the lungs where gas exchange takes place.

Accepted Answer

Alveolus

Answer

Bronchus

Answer

Trachea

Answer

Bronchiole

Question 13

Which respiratory disorder involves inflammation of the bronchi?

Accepted Answer

Bronchitis

Answer

Emphysema

Answer

Asthma

Answer

Pneumonia

Question 14

Which gas is not part of the gas exchange process?

Accepted Answer

Helium

Answer

Oxygen

Answer

Carbon dioxide

Answer

Nitrogen

Question 15

Name the process that converts carbon dioxide into bicarbonate ion in the blood.

Accepted Answer

Carbonic anhydrase reaction

Answer

Respiration

Answer

Diffusion

Answer

Bohr effect

Question 16

What condition arises when excessive carbon dioxide accumulates in the blood?

Accepted Answer

Hypercapnia

Answer

Hypocapnia

Answer

Anemia

Answer

Hypoxia

Question 17

Which of the following structures is responsible for facilitating the exchange of gases between the lungs and the bloodstream?

Accepted Answer

Alveoli

Answer

Bronchi

Answer

Trachea

Answer

Pharynx

Question 18

During inhalation, which of the following actions occur in the respiratory muscles?

Accepted Answer

Diaphragm contracts, intercostal muscles relax

Answer

Diaphragm relaxes, intercostal muscles contract

Answer

Both diaphragm and intercostal muscles contract

Answer

Both diaphragm and intercostal muscles relax

Question 19

What is the primary function of haemoglobin in the blood?

Accepted Answer

Transporting oxygen

Answer

Transporting carbon dioxide

Answer

Regulating pH balance

Answer

Fighting infections

Question 20

What is the scientific term for the passive movement of molecules from an area of high concentration to an area of low concentration?

Accepted Answer

Diffusion

Answer

Osmosis

Answer

Filtration

Answer

Active transport

Question 21

Which of the following is NOT a vital function of the respiratory system?

Accepted Answer

Digestion

Answer

Gas exchange

Answer

Regulation of blood pH

Answer

Thermoregulation

Question 22

What is the medical term for the condition where the alveoli are filled with fluid?

Accepted Answer

Pneumonia

Answer

Emphysema

Answer

Pulmonary embolism

Answer

Atelectasis

Question 23

Which of the following techniques is primarily used to measure lung function?

Accepted Answer

Spirometry

Answer

Electrocardiogram

Answer

Ultrasound

Answer

Magnetic resonance imaging

Question 24

What is the purpose of surfactant in the lungs?

Accepted Answer

Reduces surface tension, preventing alveolar collapse

Answer

Facilitates the diffusion of oxygen

Answer

Prevents infection

Answer

Regulates blood pressure