3RD TERM ACT S3

1. Materia: Biology Senior 3
Profesora: Ma. Magdalena Ravagnan
Contenido nodal: Maintenance of the organisms
TERCER TRIMESTRE
Fecha de presentación: Monday December 11th
A- Transport in humans
1) Fig 1 shows a section through the heart
(a) Label parts A, B, C and D
(b) Shade the cavity of the ventricle which contains oxygenated blood.
(c) Outline the function of structure A
(d) Suggest why the wall around chamber C is much thick than that around chamber D
2) BLOOD VESSELS: The coronary arteries supply blood to the heart muscle.
a- Suggest two activities of humans which might cause a clot in the coronary artery.
1 ……………………………………………………………………………………………………………………..
2 …………………………………………………………………………………………………………………

2. b- Explain what might be the result of such a blockage.
……………………………………………………………………………………………………………………..
……………………………………………………………………………………………………………………………..
……………………………………………………………………………………………………………………………….
3) a- Make a labelled drawing of an artery, a vein and a capillary.
b- State and explain the differences between them.
4) Explain the role of the pancreas and liver in the maintenance of the concentration of glucose in blood.
5) Explain 2 mechanisms in the skin that helps to keep the body temperature steady.