A
During exhalation:
a) atmospheric pressure increases
b) the diaphragm relaxes, increasing intrapulmonic pressure
c) intrapulmonic pressure decreases
d) accessory muscles may contract, pulling the ribcage upward
b) the diaphragm relaxes, increasing intrapulmonic pressure
Why is the shape of the alveoli and the capillary beds surrounding them important?
a) it allows pulmonary diffusion through the pleura
b) it takes advantage of Henry law because of cellular respiration
c) it allows the lungs to expand for capillary gas exchange
d) it creates a large surface area for pulmonary diffusion
d) it creates a large surface area for pulmonary diffusion
Which of the following is NOT an adaptation contributing to the decreased stroke volume seen at rest and submaximal exercise in endurance-trained athletes
a) increased end-diastolic volume
b) decreased left ventricular muscle mass
c) decreased blood pressure
d) increased total blood volume
b) decreased left ventricular muscle mass
During the exercise, your initial volume increased to 1200ml with 20 breath frequency. What is amount of air that participated in gas exchange? Show your work with unit.
AV=(1200ml-150ml)x20 breaths/min
= 1050mlx20breaths/min
= 21,000ml/min or 21L/min