AEROSPACE PHYSIOLOGY EXAM
COMPLETE QUESTIONS WITH 100%
CORRECT ANSWERS
\.What is the approximate percentage of oxygen, nitrogen, and other
gases at 18,000 feet MSL? - ANSWERS-21 percent oxygen, 78 percent
nitrogen, and 1 percent other gases
\.Which of the following is the best description of atmospheric pressure
and its cause? - ANSWERS-The combined weight of all the atmospheric
gases which is caused by gravity pulling the gas molecules earthward
and thermal and solar radiation expanding the gases outward toward
space
\.What are the common units used to measure atmospheric pressure? -
ANSWERS-inches of mercury (inHg), millimeters of mercury (mmHg),
pounds per square inch (psi)
\.Which of the following represents the notation for the partial pressure
of gases? - ANSWERS-PO2 partial pressure of oxygen, PCO2 partial
pressure of carbon dioxide, PN2 partial pressure of nitrogen
,\.PO2 increases and the percentage of oxygen decreases as the altitude
increases. - ANSWERS-False
\.What is the temperature lapse rate up to approx. 35,000 feet? -
ANSWERS-About 2 degrees Celsius per 1000 feet
\.The human body is adapted to which physiological division of the
atmosphere? - ANSWERS-Physiological Zone
\.Boyle's Law - ANSWERS-Explains why a balloon expands as it ascends
and also why a volume of air expands when trapped in a body cavity
when pressure is reduced around it // pressure & volume of a gas are
inversely proportional when temp is constant -- physiologically: trapped
gas
\.Henry's Law - ANSWERS-Explains why a soda pop bubbles after it is
opened // amount of gas in a solution varies directly with the partial
pressure of gas over the solution -- physiologically: evolved gas
disorders (ex: DCS)
\.Dalton's Law - ANSWERS-Explains how exposure to a high altitude can
reduce the available oxygen // total pressure of a mixture of gases =
sum of partial pressures of each gas in a mixture -- physiologically:
hypoxia (altitude/hypoxic)
, \.Charles' Law (Gay-Lussac's Law) - ANSWERS-Explains why the
temperature increases in a cylinder that is being pressurized // when
volume is constant, pressure of a gas increases or decreases
proportionally to increase or decrease in temperature
\.Law of Gaseous Diffusion (Graham's Law) - ANSWERS-Explains how
oxygen moves out of the lungs into the bloodstream // gases will move
from an area of high pressure to low pressure until pressure is equal --
physiologically -- transfer of gases (in lungs, etc.)
\.The purpose of respiration is to get ______ into the body and remove
excess ______ - ANSWERS-oxygen; carbon dioxide
\.What is/are the site(s) of gas exchange in the lung between the
atmosphere and the blood? - ANSWERS-Alveoli
\.What is the normal breathing rate of an average adult? - ANSWERS-12-
16 breaths per minute
\.What is the most important factor in the control of ventilation under
normal conditions? - ANSWERS-PCO2
\.What is the main function of red blood cells? - ANSWERS-Carry oxygen
COMPLETE QUESTIONS WITH 100%
CORRECT ANSWERS
\.What is the approximate percentage of oxygen, nitrogen, and other
gases at 18,000 feet MSL? - ANSWERS-21 percent oxygen, 78 percent
nitrogen, and 1 percent other gases
\.Which of the following is the best description of atmospheric pressure
and its cause? - ANSWERS-The combined weight of all the atmospheric
gases which is caused by gravity pulling the gas molecules earthward
and thermal and solar radiation expanding the gases outward toward
space
\.What are the common units used to measure atmospheric pressure? -
ANSWERS-inches of mercury (inHg), millimeters of mercury (mmHg),
pounds per square inch (psi)
\.Which of the following represents the notation for the partial pressure
of gases? - ANSWERS-PO2 partial pressure of oxygen, PCO2 partial
pressure of carbon dioxide, PN2 partial pressure of nitrogen
,\.PO2 increases and the percentage of oxygen decreases as the altitude
increases. - ANSWERS-False
\.What is the temperature lapse rate up to approx. 35,000 feet? -
ANSWERS-About 2 degrees Celsius per 1000 feet
\.The human body is adapted to which physiological division of the
atmosphere? - ANSWERS-Physiological Zone
\.Boyle's Law - ANSWERS-Explains why a balloon expands as it ascends
and also why a volume of air expands when trapped in a body cavity
when pressure is reduced around it // pressure & volume of a gas are
inversely proportional when temp is constant -- physiologically: trapped
gas
\.Henry's Law - ANSWERS-Explains why a soda pop bubbles after it is
opened // amount of gas in a solution varies directly with the partial
pressure of gas over the solution -- physiologically: evolved gas
disorders (ex: DCS)
\.Dalton's Law - ANSWERS-Explains how exposure to a high altitude can
reduce the available oxygen // total pressure of a mixture of gases =
sum of partial pressures of each gas in a mixture -- physiologically:
hypoxia (altitude/hypoxic)
, \.Charles' Law (Gay-Lussac's Law) - ANSWERS-Explains why the
temperature increases in a cylinder that is being pressurized // when
volume is constant, pressure of a gas increases or decreases
proportionally to increase or decrease in temperature
\.Law of Gaseous Diffusion (Graham's Law) - ANSWERS-Explains how
oxygen moves out of the lungs into the bloodstream // gases will move
from an area of high pressure to low pressure until pressure is equal --
physiologically -- transfer of gases (in lungs, etc.)
\.The purpose of respiration is to get ______ into the body and remove
excess ______ - ANSWERS-oxygen; carbon dioxide
\.What is/are the site(s) of gas exchange in the lung between the
atmosphere and the blood? - ANSWERS-Alveoli
\.What is the normal breathing rate of an average adult? - ANSWERS-12-
16 breaths per minute
\.What is the most important factor in the control of ventilation under
normal conditions? - ANSWERS-PCO2
\.What is the main function of red blood cells? - ANSWERS-Carry oxygen
