What causes oxygen to diffuse into the blood from an alveolus (air sac) in the lungs? A) The oxygen concentration in the alveolus is higher than in the atmosphere.
B) The oxygen concentration in the alveolus is lower than in the blood.
C) The oxygen concentration in the atmosphere is higher than the carbon dioxide concentration.
D) The oxygen concentration in the blood is lower than in the alveolus.

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.