Question 20N.3.SL.TZ0.18c
| Date | November 2020 | Marks available | [Maximum mark: 2] | Reference code | 20N.3.SL.TZ0.18c |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Compare and contrast | Question number | c | Adapted from | N/A |
The micrograph shows a section through part of the liver. The diagram illustrates the details of what is found within the marked area.
[micrograph] Micrograph of liver. https://undergraduate.vetmed.wsu.edu/courses/vph-308/histology/lab-1-histologycells-
and-organelles/liver-slide-wsu_2_052 courtesy of Patrick D. Wilson, MS, DVM, Clinical Associate Professor,
Veterinary Integrative Biosciences, College of Veterinary Medicine & Biosciences, Texas A&M University.
[diagram] Reprinted by permission from Springer Nature, Nature Reviews Immunology, “Aberrant homing of mucosal
T cells and extra-intestinal manifestations of inflammatory bowel disease” by Adams and Eksteen ©2006. https://www.nature.com/nri/.
Compare and contrast the structure of sinusoids and capillaries.
[2]
a. both have walls 1 cell thick/same thickness
OR
both have a basement membrane;
b. sinusoids have pores/holes/fenestrations
OR
sinusoids have a wider lumen;
Comparison of sinusoids and capillaries produced many vague answers. Many candidates failed to treat the question as a ‘compare and contrast’ question which requires giving similarities and differences. Common errors included referring to blood type carried, cell membrane thickness and the position of the vessels in the body.
