Respiratory Homework

Drag each label to the appropriate location on the flowchart.

1. Air enters through the nose or mouth 2. Air travels down the trachea and then enters the bronchi 3. Air travels down smaller and smaller bronchioles 4. Air reaches small sacs called alveoli.

Drag each label to the appropriate location on this diagram of the human respiratory system.

a. Nasal cavity b. larynx c. trachea d. lung e. bronchus f. bronchiole g. diaphragm

Label the figure that shows "INHALATION" and the figure that shows "EXHALATION" in targets (a) and (b).
Then drag the other labels to the appropriate locations on the figures.

a. Inhalation b. Exhalation c. external intercostal muscles contract d. air enters body g. diaphragm contracts (moves down). air leaves body f. internal intercostal muscles contract h. diaphragm relaxes (moves up).

Which of the following descriptions accurately describes Boyle’s law?

The pressure of gas in your lungs is inversely proportional to the volume in your lungs.

Which muscles, when contracted, would increase the volume of air in the thoracic cavity?

diaphragm and external intercostals

Which pressure is the result of the natural tendency of the lungs to decrease their size (because of elasticity) and the opposing tendency of the thoracic wall to pull outward and enlarge the lungs?

intrapleural pressure

During an allergic reaction, which of the following would aid respiration?

epinephrine

If the transpulmonary pressure equals zero, what will happen to the lung?

lungs will collapse

Part A – Key events in gas exchange
Drag each label to the appropriate location on the flowchart.

1. Breathing moves air in and out of the lungs. 2. Oxygen diffuses from alveoli in the lungs into capillaries. 3. Oxygen enters red blood cells, where it binds to the protein hemoglobin. 4. Oxygen diffuses from the blood to the body’s tissues, and carbon dioxide diffuses from the tissues to the blood. 5. Carbon dioxide leaves the body when exhale.

Part A – Carbon dioxide transport
Drag each label to the appropriate location on the flowchart.

1. Carbon dioxide is released from the mitochondria. 2. Carbon dioxide diffuses into a capillary. 3. Carbon dioxide is carried to the lungs. 4. Carbon dioxide diffuses into an alveolus. 5. Air exits through nose or mouth

Part A – Oxygen transport
Drag each label to the appropriate location on the flowchart.

1. Oxygen diffuses from the alveoli into surrounding capillaries. 2. Oxygen enters a red blood cell. 3. Oxygen binds to a molecule of hemoglobin. 4. Oxygen is carried through blood vessels to a capillary. 5. Oxygen diffuses from the blood to the body’s tissues

During inhalation,

the diaphragm and rib muscles contract.

From which structures do oxygen molecules move from the lungs to the blood?

Alveoli

Which statement is correct?

In the blood, oxygen is bound to hemoglobin, a protein found in red blood cells.

After blood becomes oxygenated,

it returns to the heart, and is then pumped to body cells.

Hemoglobin

is a protein that can bind four molecules of oxygen.