3.3 Transport of Gases

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

what percentage of blood is plasma

Back (Answer)

55%

Front (Question)

what percentage of blood is red blood cells

Back (Answer)

45%

Front (Question)

what percentage of blood is white blood cells and platelets

Back (Answer)

less than 1%

Front (Question)

another name for red blood cells

Back (Answer)

erythrocytes

Front (Question)

another name for white blood cells

Back (Answer)

leucocytes

Front (Question)

another name for platelets

Back (Answer)

thrombocytes

Front (Question)

what percentage of plasma is water

Back (Answer)

90%

Front (Question)

what is plasmas function

Back (Answer)

contains digested food products and distributes hear around the body

Front (Question)

3 adaptations of red blood cells

Back (Answer)

• biconcave shape- giving them a large surface area so more oxygen can diffuse across the membrane • no nucleus- more room for haemoglobin so more oxygen can be transported • flexible- they can fit through very narrow lumen of the capillaries

#10

Front (Question)

what are the two types of white blood cells

Back (Answer)

granulocytes agranulocytes

#11

Front (Question)

granulocytes

Back (Answer)

have granular cytoplasm and lobed nuclei, function is to engulf pathogens by phagocytosis

#12

Front (Question)

agranulocytes

Back (Answer)

have a clear cytoplasm and spherical nucleus, produce antibodies and antitoxins

#13

Front (Question)

platelets function

Back (Answer)

involved in blood clotting

#14

Front (Question)

how many polypeptide chains does haemoglobin have

Back (Answer)

#15

Front (Question)

what is the reversible reaction between haemoglobin and oxygen

Back (Answer)

Hb + 4O2 ——> Hb4O2

#16

Front (Question)

affinity

Back (Answer)

one molecule having a chemical attraction for another

#17

Front (Question)

saturation

Back (Answer)

percentage of oxygen associated compared with the maximum possible

#18

Front (Question)

association

Back (Answer)

uptake of oxygen by haemoglobin to form oxyhemoglobin at the lungs

#19

Front (Question)

dissociation

Back (Answer)

release of oxygen at the respiring tissues to form haemoglobin

#20

Front (Question)

cooperative binding

Back (Answer)

describes the ease with which a haemoglobin molecule binds to a second and then a third oxygen molecule, compared with the first and fourth

#21

Front (Question)

what is the shape of the oxygen dissociation curve

Back (Answer)

sigmoid

#22

Front (Question)

foetal haemoglobin dissociation curve

Back (Answer)

shifted to left, has a nigher affinity for oxygen and therefore can load oxygen from the mothers blood at all partial pressures of oxygen

#23

Front (Question)

llama and lugworm dissociation curve

Back (Answer)

shifted to left, llamas live at high altitude with low atmospheric pressure and lugworms in seawater where there is low oxygen saturation. The haemoglobin has a higher affinity for oxygen and so more readily takes it up at the lungs

#24

Front (Question)

myoglobin

Back (Answer)

tertiary structured protein that is more stable than haemoglobin and acts as an oxygen store in muscle cells