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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
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
Created by: MissRParry