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Course: AQA A Level Biology 7402
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AQA A Level Biology 7402

1. Biological Molecules

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2. Cell Structure

0/95

3. Exchange and Transport

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4. Genetics, Variation and Interdependence

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5. Energy Transfers In and Between Organisms (A Level only)

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6. Organisms Respond to Changes in their Environments (A Level only)

0/93

7. Genetics, Populations, Evolution and Ecosystems (A Level only)

0/55

8. The Control of Gene Expression (A Level only)

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9. Exam Guidance and Skills

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Quiz

3.5.6 Capillaries and Tissue Fluid – Exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
Tissue fluid is forced out at the arterial end by:
Oncotic pressure
Hydrostatic pressure
Osmosis
Active transport
2.
Excess tissue fluid returns via:
Lymph vessels
Arteries
Capillaries only
Kidneys
3.

Most tissue fluid returns to the blood at the venous end of the capillary because

the water potential of the blood is lower than that of the tissue fluid and hydrostatic pressure has fallen
hydrostatic pressure is higher there
it is pumped
lymph pushes it
4.
The dissociation curve is sigmoid because of:
Cooperative binding
Bohr effect
Chloride shift
Oncotic pressure
5.
High CO2 shifts the curve:
Left
Upward
Right
Not at all
6.
Fetal haemoglobin has:
Lower affinity for O2
Higher affinity for O2
No haem groups
Same curve as adults
7.
Which enzyme forms carbonic acid in red blood cells?
Catalase
Thrombin
Amylase
Carbonic anhydrase
8.
Which statement best describes Hydrostatic pressure?
Excess tissue fluid drained into lymph vessels.
Fluid forced out of capillaries that bathes cells.
Pressure exerted by fluid, pushing fluid out of capillaries.
Protein with four polypeptide chains, each with a haem group containing Fe2+ which binds O2.
9.
Which statement best describes Oxygen dissociation curve?
Fluid forced out of capillaries that bathes cells.
Graph of percentage saturation of haemoglobin against partial pressure of oxygen.
Tendency of water to move into blood due to plasma proteins.
Haemoglobin combined with oxygen.
10.
Which statement best describes Fetal haemoglobin?
Excess tissue fluid drained into lymph vessels.
Haemoglobin with higher O2 affinity than adult haemoglobin.
Graph of percentage saturation of haemoglobin against partial pressure of oxygen.
Haemoglobin combined with oxygen.
11.
Which statement best describes Lymph?
Tendency of water to move into blood due to plasma proteins.
Graph of percentage saturation of haemoglobin against partial pressure of oxygen.
Binding of one O2 changes haemoglobin shape making further binding easier.
Excess tissue fluid drained into lymph vessels.
12.

Tissue fluid is formed when

osmosis pulls water out
lymph leaks
red cells burst
high hydrostatic pressure at the arterial end of a capillary forces plasma out
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Part of 3. Exchange and Transport — see every lesson and quiz in this unit.
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