Question

_______ is the spontaneous movement of gases, without the use of any energy or effort by the body, between the gas in the alveoli and the blood in the capillaries in the lungs. 1 point
○ osmosis ○ facilitated diffusion
○ active transport ○ simple diffusion
am i right? submit answer

Explanation:

To solve this, we analyze each option:

• Osmosis: Movement of water across a semipermeable membrane, not gases. Eliminate.
• Facilitated diffusion: Requires a transport protein, but gas exchange in lungs doesn't need this. Eliminate.
• Active transport: Requires energy (ATP), but the question states "without the use of any energy". Eliminate.
• Simple diffusion: Spontaneous movement of substances (including gases) from high to low concentration, no energy needed. This matches the gas movement between alveoli and capillaries.

Answer:

D. simple diffusion