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What is the main function of the human nervous system?
To detect stimuli, send messages, and coordinate body responses
Give one example of a stimulus and the response in humans.,
Touching a hot object → pulling hand away
How do plants respond to light?,
They grow towards the light (phototropism)
Which organ is responsible for the exchange of gases in humans?
Lungs
What gas do humans exhale during respiration?
Carbon dioxide
State one adaptation of alveoli that helps in gas exchange.
Thin walls / large surface area / surrounded by capillaries
What gas do plants release during photosynthesis?
Oxygen
What is the function of the red blood cell?,
To transport oxygen
Which blood component helps fight diseases?,
White blood cells
What is the main function of xylem in plants?,
To transport water and minerals
Name one highly reactive metal
Potassium / Sodium
Which gas is released when a metal reacts with acid?
Hydrogen
What type of reaction absorbs heat?
Endothermic reaction
Which part of the plant carries out photosynthesis?
Leaf
What waste product is removed from the body through urination?
Urea
What is the unit of electric current?
Ampere
