Curriculum
Course: AQA A Level Biology 7402
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Curriculum

AQA A Level Biology 7402

1. Biological Molecules

0/102

2. Cell Structure

0/95

3. Exchange and Transport

0/98

4. Genetics, Variation and Interdependence

0/94

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

0/63

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)

0/72

9. Exam Guidance and Skills

0/38
Quiz

6.4.11 Control of Blood Water Potential – Exam questions

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  • Questions count: 8
  • Passing grade: B+
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1.

Osmoreceptors that detect the water potential of the blood are found in the

pituitary gland
hypothalamus
kidney
liver
2.
In the gland diagram, which gland (D, near the stomach) controls blood glucose?
Dr Dabour Hub Academy - figure 1
Pancreas
Pituitary
Thyroid
Adrenal
3.

The resting potential of a neurone is about

+40 mV
0 mV
−200 mV
−70 mV
4.

The resting potential is maintained mainly by

sodium–potassium pumps and the greater permeability of the membrane to K⁺
sodium channels being open
calcium pumps
chloride ions leaving
5.

Depolarisation during an action potential is caused by

voltage-gated sodium ion channels opening and Na⁺ diffusing in
K⁺ diffusing out
Na⁺ being pumped out
Ca²⁺ leaving
6.

At a cholinergic synapse, the arrival of an action potential causes

sodium ions to leave
acetylcholine to enter the knob
calcium ions to enter the presynaptic knob
the cleft to close
7.
A control tube of distilled water gives a slight purple colour with biuret. What does this suggest?
Water contains protein naturally
The glassware or reagent is contaminated with protein
The test worked correctly
The biuret reagent is iodine
8.
Estuary organisms must control water and salt balance, a process called _____.
chemosynthesis
photosynthesis
upwelling
osmoregulation
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Part of 6. Organisms Respond to Changes in their Environments (A Level only) — see every lesson and quiz in this unit.
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