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Unit2 revision 3
Set 3 revision cards
Question | Answer |
---|---|
A stimulus is detected by the ..... | Receptor |
Impulses travel away from the CNS by which neurone? | Motor neurone |
What part of the CNS is NOT involved in a reflex action? | Brain |
Sound travels as what type of waves? | Longitudinal |
What are the chemical substances called that control many processes within the body? | Hormones |
Type 1 diabetes is controlled by .... | Insulin |
Type 2 diabetes is controlled by ..... | Diet and exercise |
People with heartburn can take which medicine? | Antacids |
Why does the stomach work better if the contents are acidic? | For stomach enzymes to work |
Write the word equation for a neutralisation reaction | Acid + alkali -> water + salt |
What is the pH colour and number for a neutral substance like water? | Green pH7 |
Which ion in stomach acid makes it acidic? | Hydrogen / H+ |
What is the unit for power? | Watts (W) |
What is the power for energy? | Joules(j) |
What is the unit for current? | Amp (A) |
What is the unit for potential difference? | Voltage (V) |
Where are genes found? | On a chromosome found in the nucleus of a cell |
What are the 7 types of energy? | Kinetic, Heat (thermal), Sound, electrical, light, gravitational potential,chemical |
Why do hydrocarbons have low boiling points? | Because there are weak forces of attraction between the molecules so they need less energy to boil |
Show a formula to represent a hydrocarbon | CnH2n+2. E.g C2H6 |
Suggest why incomplete combustion occurs in car engines? | Not enough oxygen |