LIFESCIENC 7C BOARD EVALUATION 2026
GUARANTEED PASS ANSWERS GRADED A+
● The partial pressure of a gas is:
equivalent to the total atmospheric pressure.
a measure of how quickly a gas moves across a respiratory surface.
the fractional concentration of the gas multiplied by the overall,
atmospheric pressure.
the difference in concentration of that gas inside and outside of a cell.
the weight of a given volume of the gas.. Answer: the fractional
concentration of the gas multiplied by the overall, atmospheric pressure.
● Which of the following statements is FALSE?
Ventilation increases the concentration of oxygen in the air on the
outside of the respiratory surface.
,Oxygen and carbon dioxide both move across the respiratory surface by
diffusion.
Larger, more complex animals rely on bulk flow and diffusion to deliver
oxygen to their cells, whereas some smaller, simpler animals rely on
diffusion alone.
Circulation requires a pump to generate pressure to drive flow, whereas
ventilation does not.
The same amount of oxygen enters the blood through diffusion as is
transported by circulation.. Answer: Circulation requires a pump to
generate pressure to drive flow, whereas ventilation does not.
● If the partial pressure of oxygen outside of a cell is 100 mmHg and the
partial pressure of oxygen inside of a cell is 25 mmHg, which of the
following statements is CORRECT?
There will be a net movement of oxygen from inside the cell to outside
the cell.
There will be no net movement of oxygen in either direction.
There will be a net movement of carbon dioxide out of the cell.
, There will be a net movement of oxygen from outside the cell to inside
the cell.
There will be a net movement of carbon dioxide into the cell.. Answer:
There will be a net movement of oxygen from outside the cell to inside
the cell.
● In mammals, bulk flow only refers to the movement of oxygen (either
into or out of the lungs and within the bloodstream). Bulk flow never
refers to the movement of carbon dioxide.
False
True. Answer: False
● The system diagrammed above is an example of _________BLANK
flow and is _________BLANK efficient than _________BLANK flow.
Choice A., concurrent; less; countercurrent ,
Choice B., concurrent; more; countercurrent
Choice C., countercurrent; less; concurrent
GUARANTEED PASS ANSWERS GRADED A+
● The partial pressure of a gas is:
equivalent to the total atmospheric pressure.
a measure of how quickly a gas moves across a respiratory surface.
the fractional concentration of the gas multiplied by the overall,
atmospheric pressure.
the difference in concentration of that gas inside and outside of a cell.
the weight of a given volume of the gas.. Answer: the fractional
concentration of the gas multiplied by the overall, atmospheric pressure.
● Which of the following statements is FALSE?
Ventilation increases the concentration of oxygen in the air on the
outside of the respiratory surface.
,Oxygen and carbon dioxide both move across the respiratory surface by
diffusion.
Larger, more complex animals rely on bulk flow and diffusion to deliver
oxygen to their cells, whereas some smaller, simpler animals rely on
diffusion alone.
Circulation requires a pump to generate pressure to drive flow, whereas
ventilation does not.
The same amount of oxygen enters the blood through diffusion as is
transported by circulation.. Answer: Circulation requires a pump to
generate pressure to drive flow, whereas ventilation does not.
● If the partial pressure of oxygen outside of a cell is 100 mmHg and the
partial pressure of oxygen inside of a cell is 25 mmHg, which of the
following statements is CORRECT?
There will be a net movement of oxygen from inside the cell to outside
the cell.
There will be no net movement of oxygen in either direction.
There will be a net movement of carbon dioxide out of the cell.
, There will be a net movement of oxygen from outside the cell to inside
the cell.
There will be a net movement of carbon dioxide into the cell.. Answer:
There will be a net movement of oxygen from outside the cell to inside
the cell.
● In mammals, bulk flow only refers to the movement of oxygen (either
into or out of the lungs and within the bloodstream). Bulk flow never
refers to the movement of carbon dioxide.
False
True. Answer: False
● The system diagrammed above is an example of _________BLANK
flow and is _________BLANK efficient than _________BLANK flow.
Choice A., concurrent; less; countercurrent ,
Choice B., concurrent; more; countercurrent
Choice C., countercurrent; less; concurrent
