Question 1

Which muscles are primarily responsible for increasing the volume of the thoracic cavity during inhalation?

Accepted Answer

Diaphragm and external intercostal muscles

Answer

Abdominal muscles

Answer

Pectoral muscles

Answer

Quadriceps muscles

Question 2

During exhalation, which muscles relax to decrease the volume of the thoracic cavity?

Accepted Answer

Diaphragm and external intercostal muscles

Answer

Quadriceps muscles

Answer

Abdominal muscles

Answer

Pectoral muscles

Question 3

What is the role of surfactant in the respiratory system?

Accepted Answer

To reduce surface tension in the alveoli and prevent them from collapsing

Answer

To increase the production of mucus in the respiratory tract

Answer

To regulate the pH of the blood

Answer

To transport oxygen from the lungs to body tissues

Question 4

What is the term used to describe the process of air moving into and out of the lungs?

Accepted Answer

Ventilation

Answer

Perfusion

Answer

Diffusion

Answer

Respiration

Question 5

Which structure in the respiratory system is responsible for filtering, moistening, and warming the air that enters the lungs?

Accepted Answer

The nasal cavity

Answer

The bronchioles

Answer

The trachea

Answer

The alveoli

Question 6

Which of the following statements is true regarding inhalation during ventilation?

Accepted Answer

The diaphragm contracts and moves downwards, while the external intercostal muscles contract and move the ribs upwards and outwards

Answer

The diaphragm relaxes and moves upwards, while the external intercostal muscles relax and move the ribs downwards and inwards

Answer

The diaphragm and external intercostal muscles both relax, allowing the lungs to expand and air to enter

Answer

The diaphragm and external intercostal muscles both contract and move downwards, reducing the volume of the thoracic cavity

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