Structure and Function of the Respiratory System

Which of the following muscles does NOT assist in the mechanics of breathing?

• Scalene

• Adductor longus

• Diaphragm

• Pectoralis minor

Which of the following structures does NOT contain cartilage?

• Alveoli

• Trachea

• Bronchus

• Epiglottis

___________ is the volume of air that is always present in the lungs

The external intercostal muscles only contract to move the rib cage during exercise

• True

• False

Diffusion of gases occurs because of a difference in...

• Type of gas

• Type of blood cell

• Exercise levels

• Pressure of the different gases

Which of the following is the correct passage of air, moving from outside the body?

• Nasal cavity, pharynx, bronchioles, trachea, bronchus

• Nasal cavity, larynx, pharynx, bronchus, trachea

• Nasal cavity, pharynx, bronchioles, trachea, alveoli

• Nasal cavity, pharynx, trachea, bronchioles, alveoli

___________ is the term given to the movement of gas from areas of high to low pressure/concentration

The total amount of air that can be present in the lungs at any time is termed?

• Vital capacity

• Tidal volume

• Total lung volume

• Inspiratory reserve volume

As the diaphragm contracts it flattens which...

• Causes greater volume of the thoracic cavity

• Decreases the space available for the lungs to inflate

• Decreases the volume of the thoracic cavity

• Increases the pressure inside the thoracic cavity

Which of the following characteristics of the alveoli would allow for efficient gas exchange?

• Moist and warm with thin walls

• Small surface area

• Low pulmonary capillary density

• Few alveoli in each lung