DP Biology (last assessment 2024)
Question 18M.2.SL.TZ1.3b
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.2.SL.TZ1.3b |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Distinguish | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 3]
18M.2.SL.TZ1.3b
(b)
Distinguish between the structure of arteries and the structure of veins.
[3]
Markscheme
a. arteries have thicker (muscular) walls/layer/tunica (media)
OR
veins have thinner (muscular) walls/layer/tunica (media)
b. arteries have no valves
OR
veins have valves
c. arteries have thicker elastic layer
OR
veins have thinner elastic layer
d. arteries have a smaller lumen/bore
OR
veins have a larger lumen/bore
Accept answers presented in a table.
