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

6.1.12 Heart Rate – Exam questions

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  • Questions count: 8
  • Passing grade: B+
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1.
Why does heart rate increase during exercise?
To cool the blood
To reduce blood pressure
To lower the rate of respiration
To supply more oxygen and glucose to muscles
2.
Activation of this system slows the heart rate, constricts the pupils, and stimulates pancreatic activity.
SAT Biology - Question 019
A
B
C
D
E
3.
Breathing rate and heart rate during exercise are shown. What explains both rising?
Exercise lowers oxygen demand
Muscles need more oxygen delivered and more CO₂ removed
The lungs make glucose
Blood stops circulating
4.
A student wants to know if caffeine changes heart rate in water fleas. Which plan is best?
Test one flea in caffeine at 30 °C and one in water at 20 °C
Count heart rate in 10 fleas in pond water and 10 in caffeine solution at the same temperature
Watch fleas and guess whether they look faster
Put all fleas in caffeine only
5.
Heart rate before and after a sudden fright is shown. Which hormone explains the change?
Insulin
Adrenaline
Oestrogen
Glucagon only
6.
Which method best tests the effect of caffeine on heart rate (via adrenaline-like effects)?
One person, no control
Measure heart rate before and after caffeine or placebo in many people, blind
Measure height
Ask how they feel
7.

During exercise, heart rate increases because

the vagus nerve is stimulated
the cardiovascular control centre sends impulses along the sympathetic nerve to the SAN
CO₂ falls
blood pH rises
8.
Adrenaline increases heart rate and blood glucose. True or false?
False
False, it lowers both
True only during sleep
True
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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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