Blood
11.4What the syllabus asks of you
- Identify red and white blood cells (lymphocytes and phagocytes) as seen under the light microscope on prepared slides, and in diagrams and photomicrographs
- List the components of blood as red blood cells, white blood cells, platelets and plasma
- State the functions of the components of blood: (a) red blood cells – oxygen transport (b) white blood cells – antibody production by lymphocytes and engulfing pathogens by phagocytes (c) platelets – clotting by converting soluble fibrinogen to insoluble fibrin to prevent blood loss and the entry of pathogens (d) plasma – transport, limited to: blood cells, ions, glucose, amino acids, hormones, carbon dioxide, urea, vitamins and plasma proteins
- Describe the transfer of substances between blood in capillaries, tissue fluid and body cells
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Chapter 11: Blood
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3 questions
1Oct / Nov 2020 · Paper 11 · Q13Show mark scheme →
Aplatelets, fibrin, fibrinogen
Bplatelets, fibrinogen, fibrin
Cred blood cells, fibrin, fibrinogen
Dred blood cells, fibrinogen, fibrin
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2May / June 2019 · Paper 12 · Q13Also set in May / June 2019 Paper 11Show mark scheme →
Acarbon dioxide and glucose
Bcarbon dioxide and lactic acid
Cglucose and oxygen
Dlactic acid and oxygen
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3May / June 2019 · Paper 12 · Q15Show mark scheme →
AThey can ingest bacteria by a process called phagocytosis.
BThey can produce antigens in response to foreign antibodies.
CThey convert fibrinogen to fibrin when bleeding happens.
DThey transport toxins from body tissues to the liver.
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