Question

match the different ions and molecules to the type of transport needed to pass through the plasma membrane.
amino acid+ co₂+ k⁺ na⁺ ca⁺
active transport
facilitated diffusion
simple diffusion
passive transport

Explanation:

Simple diffusion is for small, non - polar molecules like $CO_2$ that can pass directly through the lipid bilayer. Facilitated diffusion uses transport proteins for molecules that can't pass directly, such as $K^+$, some amino acids. Active transport requires energy and is used for moving ions like $Na^+$ and $Ca^+$ against their concentration gradients. Passive transport includes simple and facilitated diffusion.

Answer:

• Amino acid: facilitated diffusion
• $CO_2$: simple diffusion
• $K^+$: facilitated diffusion
• $Na^+$: active transport
• $Ca^+$: active transport