AQA GCSE Biology Paper 2 ALL QUESTIONS AND CORRECT VERIFIED ANSWERS| 100% GUARANTEED TO PASS!|ALREADY GRADED A+/BRAND NEW VERSION

AQA GCSE Biology Paper 2 ALL QUESTIONS AND CORRECT VERIFIED AN
SWERS|100% GUARANTEED TO PASS!|ALREADY GRADED A+/BRAND NE
VERSION
Study online at https://quizlet.com/_h4uam3

1. What is home- The maintenance of a constant internal environment.
ostasis?

2. What is a stimu- A change in your environment than requires a response. e.g Light, sound, touch,
lus? pressure, pain, chemical or temperature.

3. What do the re- Detect the stimulus or change in environment.
ceptors do?

4. What happens Receptors send messages to the CNS via the sensory neurone.
after the recep-
tors?

5. What makes up The brain or spinal cord
the central ner-
vous system?




6. What is an effec- Muscles or glands that bring about a response.
tor?




7. What do the mus- Muscles contract and glands secrete chemical substances(hormones).
cles and glands
do in response to
stimuli?




, AQA GCSE Biology Paper 2 ALL QUESTIONS AND CORRECT VERIFIED AN
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8. What is a sensory A neurone that carry information from the receptors to the CNS.
neurone?




9. What is a relay Neurones that carry impulses from the sensory neurone to the motor neurone.
neurone?

10. What is a motor Neurones that carry information from the CNS to the effectors.
neurone?




11. What is the ner- It is a system that allows you to react to your surroundings.
vous system?

12. How do signals The chemical or neurotransmitter diffuses across the synapse and binds to a
travel across a complementary receptor on the neurone (postsynaptic). This causes an electrical
synapse? impulse to travel down the next neurone.




13. What is a A gap between two neurones.
synapse?






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SWERS|100% GUARANTEED TO PASS!|ALREADY GRADED A+/BRAND NE
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14. What is Near the hypothalamus, monitors the temperature of blood.
the thermoregu-
latory centre of
the brain?


15. Describe the Stimulus->Receptor->sensory neurone->CNS (relay neurone) -> motor neurone
stages in a reflex -> effector -> response
arc.




16. Name responses Hairs lie flat, sweat and blood vessels get wider(vasodilation)
that reduce body
temperature.


17. What happens The blood vessels supplying the skin dilate (widen). This helps to transfer energy
during vasodila- to the environment.
tion?

18. Name respons- Hairs stand up, no sweat, shivering and blood vessels constrict(vasoconstriction)
es that increase
body tempera-
ture.


, AQA GCSE Biology Paper 2 ALL QUESTIONS AND CORRECT VERIFIED AN
SWERS|100% GUARANTEED TO PASS!|ALREADY GRADED A+/BRAND NE
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19. What happens The blood vessels supplying the skin constrict to close off the skins blood supply.
during vasocon-
striction?

20. What is the 37 degrees Celsius
body's core
temp?

21. What are hor- Chemical messengers that travel in the blood to target organs.
mones?



22. Compare and Nervous is faster acting than the endocrine system.
Contrast the en- Hormones have longer lasting effects compared to electrical impulses. Nerves act
docrine (hor- on a very specific area whereas hormones act more general.
mone) system
and the nervous
system.

23. What does the Produces thyroxine which is involved in regulating metabolism.
thyroid gland do?




24. What do the Produce adrenaline which is used to prepare the body for fight or flight.
adrenal glands
do?