Item BF126001: Neither large molecules like proteins nor small molecules like amino acids can pass through the walls of arteries and veins.

What kinds of molecules can pass through the walls of large blood vessels such as arteries and veins?

  1. Both small molecules like amino acids and large molecules like proteins can pass through the walls of arteries and veins.
  2. Small molecules like amino acids can pass through the walls of arteries and veins, but large molecules like proteins cannot.
  3. Large molecules like proteins pass through the walls of arteries and veins, but small molecules like amino acids cannot.
  4. Neither large molecules like proteins nor small molecules like amino acids can pass through the walls of arteries and veins.