GCSE AQA Triple Biology Higher Tier Paper 2 Including Exam Questions and Certified Answers, with a 100% Guarantee of Success

GCSE AQA Triple Biology
Higher Tier Paper 2



Including Exam Questions and
Certified Answers, with a 100%
Guarantee of
Success

,Question 1
Homeostasis
Correct Answer
The regulation of the internal conditions of a cell or organism in response to internal or external
changes. E.g. the control of: blood glucose concentration, body temperature, water and ion
levels, etc.


Question 2
Negative Feedback
Correct Answer
This is a type of control mechanism:
1) a receptor detects a change in a stimulus.
2) the coordination centre compares the stimulus to a set point.
3) an effector then produces a response to correct any difference from the set point.


Question 3
The Thermoregulatory Centre
Correct Answer
This is in the brain and it monitors and controls body temperature, blood temperature via
impulses from temperature receptors.


Question 4
Effects when Body Temperature is too High
Correct Answer
- Vasodilation.
- Swear more.
- Transfer of energy form the skin to the environment.


Question 5
Effects when Body Temperature is too Low
Correct Answer
- Vasoconstriction
- Stop sweating
- Piloerection
- Shiver


Question 6
The Nervous System
Correct Answer
This enables humans to react to their surroundings and coordinate their behaviour. It stimulates
a reflex arc.

, Question 7
Types of Neurones
Correct Answer
Sensory Neurone, Motor Neurone, Relay Neurone.


Question 8
Reflex Arc
Correct Answer
1) the pain stimulus is detected by receptors.
2) impulses from the receptor pass along a sensory Neurone to the CNS.
3) an impulse then passed through a relay Neurone.
4) a motor neurone carries an impulse to the effector.
5) the effector (muscle or gland) responds


Question 9
Synapse
Correct Answer
The connection between neurones. When an electrical impulse reaches this, a chemical is
released that diffused across the gap. This causes an electrical impulse to be generated in the
second one.


Question 10
Human Reaction Time Required Practical
Correct Answer
1) the experimenter holds a meter rule from the end.
2) the subject had their finger and thumb a small distant apart either side of the ruler on the
50cm line.
3) the experimenter lets go of the ruler and the subject has to trap it.
4) the distance the ruler travels from the 50cm line is noted.
5) the experiment is repeated on the subjects that have just drunk coffee and the subjects that
have not.


Question 11
Parts of the brain
Correct Answer
- Medulla
- Cerebellum
- Cerebral Cortex


Question 12
Medulla
Correct Answer