Question 17N.3.SL.TZ0.18
| Date | November 2017 | Marks available | [Maximum mark: 6] | Reference code | 17N.3.SL.TZ0.18 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Distinguish, Identify, Outline | Question number | 18 | Adapted from | N/A |
The diagram shows the liver. The arrows show the direction of blood flow into and out of the liver.
[Source: © International Baccalaureate Organization 2017]
Identify the blood vessel labelled B.
[1]
«hepatic» portal vein
Outline the function of the blood vessel labelled B.
[3]
a. takes blood from intestine/spleen/pancreas/stomach to liver
b. carries digested food/nutrients/glucose
c. prevents glucose entering the general circulation
d. helps maintain osmotic potential of blood
e. allows toxins to be removed
[Max 3 Marks]
Distinguish between the structure of liver sinusoids and capillaries.
[2]
a. sinusoids have open pores/fenestrations/discontinuous endothelium and capillary endothelium is continuous/does not contain fenestrations
b. Kupffer cells are located inside sinusoids but not in capillaries
c. sinusoids larger in diameter than capillaries
Accept labelled diagrams
[Max 2 Marks]