Which of the following is considered the structural and basic functional unit of the lung that is responsible for the exchange of oxygen and carbon dioxide during respiration? a. Bronchioles b. Lungs c. Bronchus d. Alveoli

Which of the following is NOT a function of the pleurae and pleural fluid? A. decreasing friction within the pleural space B. compartmentalizing the thorax and preventing infections from spreading to the heart C. assisting with the development of an intra-pleural pressure that leads to inspiration D. removing dust and inhaled debris from the airways

Most of the carbon dioxide in the blood is carried in the form of a. dissolved CO2 b. carbaminohemoglobin. c. bicarbonate. d.carboxyhemoglobin.

During respiration, oxygen is inhaled through the airways into the alveoli where gas exchange occurs. For each condition described below, state if the flux of oxygen through the blood gas barrier into the pulmonary capillaries increases or decreases. Use Fick’s law to justify your answer. a. Climbing to the top of Mt. Everest b. More abundant but smaller alveoli c. Extreme increase in pulmonary capillary pressure d. Pulmonary fibrosis

Which of the following statements about choking is true?a. It triggers the cough reflex.b. It occurs when a foreign particle blocks the alveoli.c. Partial blockage of the airway always causes death.d. The cough reflex makes one choke

Which of the following will NOT facilitate the transfer of oxygen to tissues? a. decreased body temperature b. decreased pH of the blood c. increased carbon dioxide d. increased exercise

Ventilation of alveoli above the needs of metabolism tends to     A. Increase the hydrogen ion concentration in the blood   B. Increase the carbon dioxide concentration in the blood   C. Leads to respiratory acidosis   D. Decrease the carbon dioxide concentration in the blood   E. Decrease the pH of the blood

which of these variables would NOT affect the ability of a gas to diffuse across the respiratory membrane going from the alveolous to the blood  a. partial pressure of the gas in question b. hemoglobin count c. surface area of the alveolous d. dissusion distance

Which of these statements about the partial pressure of carbon dioxide is true?a. It is higher in the alveoli than in the pulmonary arteries.b. It is higher in the systemic arteries than in the tissues.c. It is higher in the systemic veins than in the systemic arteries.d. It is higher in the pulmonary veins than in the pulmonary arteries.