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CyfarthfaB1Regulatio
| Question | Answer |
|---|---|
| Stimulus for eyes | Light |
| Stimulus for nose | Chemicals in the air |
| Stimulus for tongue | Chemicals in food |
| Stimuli for skin | Temperature and pressure |
| Stimulus for ears | Sound |
| A detectable change in the environment | Stimulus |
| Name the 5 sense organs | Eyes, ears, nose, skin, tongue |
| Specialised cells found in sense organs | Receptors |
| Cells that carry messages to and from the brain | Nerves |
| The type of message carried along a nerve | Electrical impulse |
| Two organs in the central nervous system | Brain and spinal cord |
| The stimulus for plant shoots | Light |
| The stimulus for plant roots | Gravity |
| The response made by plant shoots in response to light | Positive phototropism |
| The response made by plant roots in response to gravity | Positive gravitropism |
| The substance that controls plant tropisms | Hormones |
| The organ that regulates body temperature | Skin |
| Can stand on end to trap air | Hair |
| Controls the position of the hair | Erector muscle |
| Structure that makes sweat | Sweat gland |
| Tube that carries sweat to the surface | Sweat pore |
| Releases sweat onto the surface of the skin | Sweat pore |
| Response made by blood vessels when you're hot | Widen/ vasodilation |
| Response made by blood vessels when you're too cold | Narrow / vasoconstriction |
| Explain why sweating cools you down | Sweat evaporates using heat from your skin |
| Explain why the blood vessels narrowing raises body temperature | Less blood flowing through skin - less heat lost |
| Explain why blood vessels widening lowers body temperature | More blood flowing through the skin - more heat lost |
| Explain why hairs standing in end raises body temperature | Thicker layer of air next to skin - air insulates - less heat lost |
| Explain why hairs lying flat lowers body temperature | Thinner layer of air next to skin - more heat lost |
| Hormone that reduces blood glucose | Insulin |
| Organ that makes insulin | Pancreas |
| How insulin reaches the liver | Blood |
| Target organ for insulin | Liver |
| Insulin cause glucose to be converted to ... | Glycogen |
| HORMONE THAT RAISES BLOOD GLUCOSE LEVELS | GLUCAGON |
| EFFECT OF GLUCAGON | CONVERTS GLYCOGEN INTO GLUCOSE |
| Condition when you don't make enough insulin | Diabetes |
| Three ways to treat diabetes | Regular insulin injections, low carbohydrate diet, pancreas transplant |
| Chemical used to test for glucose | Benedicts (heat needed) |
| Colour benedicts changes if glucose is present | Brick red |
| Two fluids tested for glucose in diabetic patient | Urine, blood |