Which of the following statements about the lungs of an upright person is true? O A. The ventilation/perfusion ratio is higher at the top of the lung than at the bottom. O B. Blood flow to the top of the lung per gm of tissue is much greater than at the bottom. OC. Ventilation at the top of the lung per gm of tissue is greater than at the bottom O D. The ventilation/perfusion ratio is lower at the top of the lung than at the bottom. OE. None of the above

Due to polio, a patient suffers total paralysis of his muscles. For this patient, which of the following values would still be expected to be essentially normal?  a. Inspiratory reserve volume b. expiratory reserve volumec. vital capacityd. none of the abovee. total lung capacity

1.) True or False: Total Pulmonary Ventilation is always greater than Alveolar Ventilation?   True   False   2.) Negative pressure in the pleural sac is generated by __________ elastic recoil of the thoracic wall and ____________ elastic recoil of the lungs:   Inward; inward   Outward; outward   Inward; outward   Outward; inward   None of the above

Which of the following is the most important factor regulating the respiratory rate? O A. Bicarbonate concentration of the blood. OB. Concentration of carbaminohemoglobin. OC. Partial pressure of carbon dioxide of the blood. O D. pH of systemic venous blood O E. Oxygen concentration of systemic venous blood

In the diagram below, What does H represent? a. Residual volume. b. Functional residual capacity. c. Inspiratory reserve volume. d. Vital capacity. e. Total lung capacity.

what is the main driver of normal quiet ventilation..   a.the H+ concentration in the arterial blood, which is monitored by central chemoreceptors b.the PO2 of the arterial blood, which is monitored by central chemoreceptors   c.the PO2 of the arterial blood, which is monitored by peripheral chemoreceptors   d.the H+ concentration in the CSF, which is monitored by central chemoreceptors   e.the PCO2 of the arterial blood, which is monitored by peripheral chemoreceptors

The body changes alveolar ventilation rates to maintain proper alveolar gas levels. Which of the following would result in an increase in minute alveolar ventilation? Select one: O a. None are correct O b. Central chemoreceptors detecting a small decrease in 02 levels O c. venous pCO2 of 43 O d. Peripheral chemoreceptors detecting a decrease in pH levels O e. Decreasing the respiring tissue consumption of 02

Choose the correct description of inhalation. a. Air is forced into the lungs and then the diaphragm moves down b. Air is forced into the lungs and then the diaphragm moves up c. The diaphragm moves up  making less space, and air pushes in. d. The diaghragm moves down, making more space and air is pulled in.

If a person takes a deep breath and holds it with the mouth and nose closed, what is the pressure of gases within the alveoli relative to atmospheric pressure? O Less than atmospheric pressure Greater than atmospheric pressure O Equal to atmospheric pressure O Cannot be determined without more information

WHich of the following finding at the apex best explains why ventilation-perfusion ratios are higher at the apex than base of a normal upright lungs? a. Alveolar Po2 is higher b. Alveoli contains more elastin and less collagen c. Alveoli have less surfacant d. Change in pleural pressure with each breathe is higher e. Perfusion is lower