AQA GCSE Biology Paper 2 EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS ALREADY
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What is homeostasis? - ✔✔ANSWER✔✔->>The maintenance of a constant
internal environment.
What is a stimulus? - ✔✔ANSWER✔✔->>A change in your environment than
requires a response. e.g Light, sound, touch, pressure, pain, chemical or
temperature.
What do the receptors do? - ✔✔ANSWER✔✔->>Detect the stimulus or change in
environment.
What happens after the receptors? - ✔✔ANSWER✔✔->>Receptors send messages
to the CNS via the sensory neurone.
What makes up the central nervous system? - ✔✔ANSWER✔✔->>The brain or
spinal cord
,What is an effector? - ✔✔ANSWER✔✔->>Muscles or glands that bring about a
response.
What do the muscles and glands do in response to stimuli? - ✔✔ANSWER✔✔-
>>Muscles contract and glands secrete chemical substances(hormones).
What is a sensory neurone? - ✔✔ANSWER✔✔->>A neurone that carry
information from the receptors to the CNS.
What is a relay neurone? - ✔✔ANSWER✔✔->>Neurones that carry impulses from
the sensory neurone to the motor neurone.
What is a motor neurone? - ✔✔ANSWER✔✔->>Neurones that carry information
from the CNS to the effectors.
What is the nervous system? - ✔✔ANSWER✔✔->>It is a system that allows you to
react to your surroundings.
How do signals travel across a synapse? - ✔✔ANSWER✔✔->>The chemical or
neurotransmitter diffuses across the synapse and binds to a complementary
receptor on the neurone (postsynaptic). This causes an electrical impulse to travel
down the next neurone.
What is a synapse? - ✔✔ANSWER✔✔->>A gap between two neurones.
What is the thermoregulatory centre of the brain? - ✔✔ANSWER✔✔->>Near the
hypothalamus, monitors the temperature of blood.
,Describe the stages in a reflex arc. - ✔✔ANSWER✔✔->>Stimulus->Receptor-
>sensory neurone->CNS (relay neurone) -> motor neurone -> effector -> response
Name responses that reduce body temperature. - ✔✔ANSWER✔✔->>Hairs lie flat,
sweat and blood vessels get wider(vasodilation)
What happens during vasodilation? - ✔✔ANSWER✔✔->>The blood vessels
supplying the skin dilate (widen). This helps to transfer energy to the
environment.
Name responses that increase body temperature. - ✔✔ANSWER✔✔->>Hairs
stand up, no sweat, shivering and blood vessels constrict(vasoconstriction)
What happens during vasoconstriction? - ✔✔ANSWER✔✔->>The blood vessels
supplying the skin constrict to close off the skins blood supply.
What is the body's core temp? - ✔✔ANSWER✔✔->>37 degrees Celsius
What are hormones? - ✔✔ANSWER✔✔->>Chemical messengers that travel in the
blood to target organs.
Compare and Contrast the endocrine (hormone) system and the nervous system. -
✔✔ANSWER✔✔->>Nervous is faster acting than the endocrine system.
Hormones have longer lasting effects compared to electrical impulses. Nerves act
on a very specific area whereas hormones act more general.
, What does the thyroid gland do? - ✔✔ANSWER✔✔->>Produces thyroxine which
is involved in regulating metabolism.
What do the adrenal glands do? - ✔✔ANSWER✔✔->>Produce adrenaline which is
used to prepare the body for fight or flight.
What is the role of the pancreas? - ✔✔ANSWER✔✔->>Produces glucagon and
insulin which are involved in regulating glucose levels in the blood.
Name the hormone that is released if blood sugar is too high. - ✔✔ANSWER✔✔-
>>Insulin
What does insulin do? - ✔✔ANSWER✔✔->>It makes the liver convert glucose into
glycogen. This causes blood glucose levels to decrease.
Name the hormone that is released if blood sugar is too low. - ✔✔ANSWER✔✔-
>>Glucagon
What does glucagon do? HINT GLU-COSE-GONE - ✔✔ANSWER✔✔->>It makes the
liver convert glycogen to glucose. This causes the blood glucose level to increase.
What is type I diabetes? - ✔✔ANSWER✔✔->>When the pancreas produces little
or no insulin.
What is type II diabetes? - ✔✔ANSWER✔✔->>When a person becomes resistant
to their own insulin. Being overweight can increase your chances of type II
diabetes.
AND CORRECT VERIFIED ANSWERS ALREADY
GRADED A+ 100% GUARANTEED PASS!
What is homeostasis? - ✔✔ANSWER✔✔->>The maintenance of a constant
internal environment.
What is a stimulus? - ✔✔ANSWER✔✔->>A change in your environment than
requires a response. e.g Light, sound, touch, pressure, pain, chemical or
temperature.
What do the receptors do? - ✔✔ANSWER✔✔->>Detect the stimulus or change in
environment.
What happens after the receptors? - ✔✔ANSWER✔✔->>Receptors send messages
to the CNS via the sensory neurone.
What makes up the central nervous system? - ✔✔ANSWER✔✔->>The brain or
spinal cord
,What is an effector? - ✔✔ANSWER✔✔->>Muscles or glands that bring about a
response.
What do the muscles and glands do in response to stimuli? - ✔✔ANSWER✔✔-
>>Muscles contract and glands secrete chemical substances(hormones).
What is a sensory neurone? - ✔✔ANSWER✔✔->>A neurone that carry
information from the receptors to the CNS.
What is a relay neurone? - ✔✔ANSWER✔✔->>Neurones that carry impulses from
the sensory neurone to the motor neurone.
What is a motor neurone? - ✔✔ANSWER✔✔->>Neurones that carry information
from the CNS to the effectors.
What is the nervous system? - ✔✔ANSWER✔✔->>It is a system that allows you to
react to your surroundings.
How do signals travel across a synapse? - ✔✔ANSWER✔✔->>The chemical or
neurotransmitter diffuses across the synapse and binds to a complementary
receptor on the neurone (postsynaptic). This causes an electrical impulse to travel
down the next neurone.
What is a synapse? - ✔✔ANSWER✔✔->>A gap between two neurones.
What is the thermoregulatory centre of the brain? - ✔✔ANSWER✔✔->>Near the
hypothalamus, monitors the temperature of blood.
,Describe the stages in a reflex arc. - ✔✔ANSWER✔✔->>Stimulus->Receptor-
>sensory neurone->CNS (relay neurone) -> motor neurone -> effector -> response
Name responses that reduce body temperature. - ✔✔ANSWER✔✔->>Hairs lie flat,
sweat and blood vessels get wider(vasodilation)
What happens during vasodilation? - ✔✔ANSWER✔✔->>The blood vessels
supplying the skin dilate (widen). This helps to transfer energy to the
environment.
Name responses that increase body temperature. - ✔✔ANSWER✔✔->>Hairs
stand up, no sweat, shivering and blood vessels constrict(vasoconstriction)
What happens during vasoconstriction? - ✔✔ANSWER✔✔->>The blood vessels
supplying the skin constrict to close off the skins blood supply.
What is the body's core temp? - ✔✔ANSWER✔✔->>37 degrees Celsius
What are hormones? - ✔✔ANSWER✔✔->>Chemical messengers that travel in the
blood to target organs.
Compare and Contrast the endocrine (hormone) system and the nervous system. -
✔✔ANSWER✔✔->>Nervous is faster acting than the endocrine system.
Hormones have longer lasting effects compared to electrical impulses. Nerves act
on a very specific area whereas hormones act more general.
, What does the thyroid gland do? - ✔✔ANSWER✔✔->>Produces thyroxine which
is involved in regulating metabolism.
What do the adrenal glands do? - ✔✔ANSWER✔✔->>Produce adrenaline which is
used to prepare the body for fight or flight.
What is the role of the pancreas? - ✔✔ANSWER✔✔->>Produces glucagon and
insulin which are involved in regulating glucose levels in the blood.
Name the hormone that is released if blood sugar is too high. - ✔✔ANSWER✔✔-
>>Insulin
What does insulin do? - ✔✔ANSWER✔✔->>It makes the liver convert glucose into
glycogen. This causes blood glucose levels to decrease.
Name the hormone that is released if blood sugar is too low. - ✔✔ANSWER✔✔-
>>Glucagon
What does glucagon do? HINT GLU-COSE-GONE - ✔✔ANSWER✔✔->>It makes the
liver convert glycogen to glucose. This causes the blood glucose level to increase.
What is type I diabetes? - ✔✔ANSWER✔✔->>When the pancreas produces little
or no insulin.
What is type II diabetes? - ✔✔ANSWER✔✔->>When a person becomes resistant
to their own insulin. Being overweight can increase your chances of type II
diabetes.
