The major function of the alveoli is to Select one: O a. moisten the air O b. filter dust and bacteria out of the air O c. secrete mucus to trap foreign particles O d. provide a greater surface area for gas exchange

What are the smallest conducting-zone bronchioles called?     alveolar ducts     alveoli     respiratory bronchioles     terminal bronchioles

Scenario: A patient arrives in the emergency room after struggling to breathe and is subsequently diagnosed with asthma. In this disease state the patient's airways can significantly decrease in radius. They noted that they were exercising when the episode occurred. Question stem: Based on your knowledge of lung anatomy, which of the following regions contains smooth muscle that could contract and decrease airway radius? Answers A - D A Bronchioles В The Alveoli The pleura D Type I cells

Oxygen diffuses from the inhaled air in the alveoli of the lungs, where its concentration is higher, into the cytoplasm of red blood cells, where its concentration is lower. Patients diagnosed with emphysema have damaged alveoli. This results to fewer, larger air spaces instead of many small ones. Explain how this damage can lead to shortness of breath? The surface area of lungs is reduced. Hence, less oxygen can diffuse into the red blood cells. The surface area of lungs is increased. Hence, more oxygen can diffuse into the red blood B cells. The surface area of lungs is reduced. Hence, more oxygen can diffuse into the red blood cells. The surface area of lungs is increased. Hence, less oxygen can diffuse into the red blood cells.

In internal respiration:   A. Carbon dioxide moves from alveoli into the capillary. B. Carbon dioxide moves from the capillary into the alveoli C. Carbon dioxide moves from the cells of visceral organs into  the capillary. D. Carbon dioxide moves from capillary into cells of visceral organs.

The conducting zone in the respiratory system has the following function a. Movement of gases only b. Movement and exchange of gases c. Exchange of gases only d. Transport of gases to the tissues