#Question id: 31305
#Unit 7. System Physiology – Animal
What is the membrane potential (threshold level) at which the S-A node discharges?
#Question id: 31415
#Unit 7. System Physiology – Animal
#Question id: 10877
#Unit 7. System Physiology – Animal
A 27-year-old man is breathing quietly. He then inhales as much air as possible and exhales as much air as he can, producing the spirogram shown in the previous figure. What is his expiratory reserve volume (in liters)?
#Question id: 10878
#Unit 7. System Physiology – Animal
The resistance of the pulmonary tree is so low that a 1 cm of water pressure gradient is sufficient to cause normal air flow during resting conditions. Which of the following often has a substantial resistance during pulmonary disease states that can limit alveolar ventilation?
#Question id: 10879
#Unit 7. System Physiology – Animal
If the inspiratory reserve volume is 3000 mL, the tidal volume is 500 mL, the expiratory reserve volume is 1000 mL, and the residual volume is 1000 mL, what is the vital capacity?
#Question id: 11059
#Unit 7. System Physiology – Animal
A healthy, 45-year-old man is reading the newspaper. Which of the following muscles are used for quiet breathing?