Item BF136001: Small molecules like amino acids can pass through capillary walls, but large molecules like proteins cannot.

What molecules can pass through the walls of capillaries?

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