Question

question 1 - 10
in humans, oxygen and carbon dioxide are exchanged between the alveoli in the lungs and the blood in the circulatory system. which of the following processes allows for the exchange of these gases in the human body?
osmosis
simple diffusion
active transport
facilitated diffusion

Explanation:

Oxygen and carbon - dioxide exchange between alveoli and blood occurs due to concentration gradients. Simple diffusion is the movement of substances from an area of higher concentration to an area of lower concentration. In the lungs, oxygen diffuses from the alveoli (higher oxygen concentration) into the blood (lower oxygen concentration), and carbon - dioxide diffuses from the blood (higher carbon - dioxide concentration) into the alveoli (lower carbon - dioxide concentration). Osmosis is the movement of water across a semi - permeable membrane. Active transport requires energy and is used for substances moving against their concentration gradient. Facilitated diffusion involves the use of transport proteins for the movement of substances.

Answer:

simple diffusion