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Biology s3, 3rd. term quest dec 2017

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3RD TERM ACT S3

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Biology s3, 3rd. term quest dec 2017

  1. 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. 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.

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