Pavlov's dog stopped salivating to the bell when the food was no longer paired with the bell. This is called:
extinction
True??? I think u don’t need to put the answer I gave u but it’s just my thought
B osmosis is simplified by water dissolves stuff
<span>Altostratus Clouds, they are thin enough to see through :)</span>
Answer:
There is a higher oxygen content in the air of the lungs than that of oxygen-depleted blood and a lower carbon dioxide concentration. This gradient of concentration causes gas exchange during respiration.
Explanation:
