Questions where students often pick the tempting wrong answer — make sure you know the right one:
What does negative feedback do in homeostasis?✗ Negative feedback makes a process get worse or amplifies the change.✓ It reverses a change in a controlled variable, bringing it back towards the set point.
Why is a reflex action faster than a conscious response?✗ The brain decides reflexes faster than other actions because it skips thinking.✓ The signal does not need to be processed by the brain — it travels through a simpler reflex arc via the spinal cord.
Does negative feedback make a change worse?✗ Negative feedback amplifies the original change.✓ No — negative feedback opposes and reverses a change, returning the condition to its set point.
How are signals transmitted across a synapse between two neurones?✗ The electrical signal jumps directly from one neurone to the next across the synaptic gap.✓ Via neurotransmitter chemicals released from the presynaptic neurone, which bind receptors on the postsynaptic neurone.
In the ruler drop test, what does a SHORTER catch distance mean?✗ Slower reaction time✓ Faster reaction time
Practise Homeostasis & Response — free games
Test yourself with these quick revision games for this topic:
