| Date | May 2017 | Marks available | 1 | Reference code | 17M.3.HL.TZ1.18 |
| Level | Higher level | Paper | Paper 3 | Time zone | Time zone 1 |
| Command term | State | Question number | 18 | Adapted from | N/A |
Question
Cells on the surface of intestinal villi have microvilli, which provide a large surface area for absorption. State another structural characteristic of these villus cells that adapts them to the absorption of nutrients.
Markscheme
a. tight junctions
b. protein channels / membrane pumps
c. large number of mitochondria
Examiners report
[N/A]
