Item BF018005: Small molecules like amino acids can pass through capillary walls but large molecules like proteins cannot.

What molecules can pass through the walls of microscopically small blood vessels (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.

Distribution of Responses

Chart showing distrubtion of responses for Item BF018005

Percent of students responding correctly

Overall47%
Grades 6–842%
Grades 9–1255%
Male47%
Female47%
Primary Language is English48%
Primary Language is not English33%

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