Respiratory Physiology in Exercise: Interactive Learning Quizzes

Question 1

How does the respiratory system adapt to meet the increased oxygen demand during exercise?

Accepted Answer

Increased tidal volume and respiratory rate, resulting in greater minute ventilation.

Answer

Decreased airway resistance, allowing for easier air movement in and out of the lungs.

Answer

Reduced oxygen extraction from the blood by the tissues, leading to increased oxygen availability to the muscles.

Answer

Increased production of red blood cells, leading to greater oxygen-carrying capacity of the blood.

Question 2

Which of the following muscles IS NOT involved in respiration?

Accepted Answer

Pectoralis major

Answer

Diaphragm

Answer

Intercostals

Answer

Abdominal muscles

Question 3

What is the primary function of surfactant in the lungs?

Accepted Answer

To reduce the surface tension of the alveoli

Answer

To increase the surface tension of the alveoli

Answer

To facilitate gas exchange

Answer

To protect the lungs from infection

Question 4

What is the term for the volume of air that can be forcefully exhaled after a maximal inspiration?

Accepted Answer

Vital capacity

Answer

Tidal volume

Answer

Residual volume

Answer

Inspiratory reserve volume

Question 5

What is the primary mechanism by which carbon dioxide is transported in the blood?

Accepted Answer

Bound to bicarbonate ions

Answer

Dissolved in plasma

Answer

Bound to haemoglobin

Answer

As carbonic acid

Question 6

What is the term for the point at which the partial pressure of oxygen in the blood is no longer sufficient to support cellular respiration?

Accepted Answer

Critical oxygen tension

Answer

Anaerobic threshold

Answer

Lactate threshold

Answer

Ventilatory equivalent for carbon dioxide

Question 7

Which of the following is a common cause of respiratory acidosis?

Accepted Answer

Hypoventilation

Answer

Hyperventilation

Answer

Metabolic acidosis

Answer

Metabolic alkalosis

Question 8

What is the primary function of the epiglottis?

Accepted Answer

To prevent food from entering the trachea

Answer

To regulate the rate of airflow into the lungs

Answer

To assist with gas exchange

Answer

To protect the vocal cords

Question 9

During exercise, which factor does NOT directly affect respiratory rate?

Accepted Answer

Blood pressure

Answer

Exercise intensity

Answer

Arterial blood pH

Answer

Body temperature

Question 10

Which of the following is the primary site where gas exchange occurs in the respiratory system?

Accepted Answer

Alveoli

Answer

Trachea

Answer

Bronchi

Answer

Bronchioles

Question 11

What is the term for the volume of air that remains in the lungs following a maximal exhalation?

Accepted Answer

Residual volume

Answer

Tidal volume

Answer

Inspiratory capacity

Answer

Vital capacity

Question 12

Which factor is primarily responsible for regulating the rate and depth of breathing during exercise?

Accepted Answer

Partial pressure of carbon dioxide in the blood

Answer

Blood glucose levels

Answer

Heart rate

Answer

Muscle fatigue

Question 13

What is the primary muscle responsible for inspiration during respiration?

Accepted Answer

Diaphragm

Answer

Intercostal muscles

Answer

Abdominal muscles

Answer

Accessory muscles

Question 14

What is the main function of hemoglobin in oxygen transport?

Accepted Answer

To transport oxygen to tissues

Answer

To regulate blood pH

Answer

To humidify inhaled air

Answer

To produce surfactant

Question 15

What is the importance of the Bohr effect in respiratory physiology?

Accepted Answer

It increases oxygen affinity of hemoglobin in acidic conditions

Answer

It increases oxygen affinity of hemoglobin in alkaline conditions

Answer

It decreases carbon dioxide affinity of hemoglobin in acidic conditions

Answer

It decreases carbon dioxide affinity of hemoglobin in alkaline conditions

Question 16

How can measurements like VO2 max and anaerobic threshold help assess an individual's respiratory fitness and pinpoint areas for improvement?

Accepted Answer

VO2 max and anaerobic threshold reveal an individual's aerobic and anaerobic fitness levels.

Answer

VO2 max and anaerobic threshold measurements don't indicate respiratory fitness.

Answer

VO2 max and anaerobic threshold only show lung volume and ventilation.

Question 17

Which of the following is NOT a type of lung volume?

Accepted Answer

Functional vital capacity

Answer

Tidal volume

Answer

Inspiratory reserve volume

Answer

Residual volume

Question 18

What is the primary function of hemoglobin in gas exchange?

Accepted Answer

To bind with oxygen and transport it to the tissues

Answer

To bind with carbon dioxide and transport it to the lungs

Answer

To regulate blood pH

Answer

To transport ions

Question 19

Which of the following factors does NOT affect the rate of pulmonary ventilation?

Accepted Answer

Cardiac output

Answer

Blood pH

Answer

Carbon dioxide concentration in the blood

Answer

Exercise intensity

Question 20

What is the term for the total volume of air that can be forcibly exhaled after a maximal inspiration?

Accepted Answer

Vital capacity

Answer

Tidal volume

Answer

Expiratory reserve volume

Answer

Inspiratory reserve volume

Question 21

Which of the following is a consequence of hyperventilation?

Accepted Answer

Respiratory alkalosis

Answer

Respiratory acidosis

Answer

Metabolic alkalosis

Answer

Increased oxygen saturation

Question 22

What is the role of the surfactant in the lungs?

Accepted Answer

To decrease surface tension and prevent alveolar collapse

Answer

To increase surface tension

Answer

To regulate gas exchange

Answer

To protect the lungs from infection

Question 23

Which of the following respiratory muscles is primarily responsible for expiration?

Accepted Answer

Abdominal muscles

Answer

Diaphragm

Answer

Intercostal muscles

Answer

Erector spinae

Question 24

What is the purpose of the respiratory dead space?

Accepted Answer

To humidify and warm incoming air

Answer

To provide additional airflow to the lungs

Answer

To prevent the mixing of fresh and expired air

Answer

To regulate blood pressure