Chapter 19 Test - Respiratory

Alveoli are kept clean by the action of

• surfactant
• antibodies
• macrophages
• platelets

The force that moves air into the lungs during inspiration comes from the

• diaphragm.
• external intercostal muscles.
• abdominal wall muscles.
• atmospheric pressure.

The force responsible for normal expiration is supplied by the

• diaphragm.
• external intercostal muscles.
• elastic recoil of tissues and surface tension.
• contraction of smooth muscles in air passages.

The pharynx functions as a __________, whereas the larynx functions as a __________.

• common passage for air and food; passageway for food only
• passageway for air only; passageway for air and food
• common passageway for air and food; passageway for air only
• passageway for food only, passageway for air and food

Pneumonia can be caused by

• bacteria, viruses, or fungi.
• viruses only.
• fungi only.
• bacteria only.

Which of the following lists all of the events that occur with respiration?

• Inhaling and exhaling
• Ventilation, external and internal respiration, and cellular respiration
• Inflating and deflating alveoli
• Delivering carbon dioxide to cells and removing oxygen from cells

The first event in inspiration is

• the diaphragm moves downward and the external intercostal muscles contract
• decreased intra-alveolar pressure.
• lung inflation.
• atmospheric pressure forces air into the respiratory tract.

The first event in expiration is

• inter-alveolar pressure increases.
• elastic tissues of the lungs, thoracic cage, and abdominal organs recoil.
• air is squeezed out of the lungs.
• the diaphragm and external intercostal respiratory muscles relax.