Biology: Year 10 Term 2: Homeostasis 0.0 / 5 ? BiologyHomeostasisGCSEAQA Created by: Charlotte HerondaleCreated on: 18-12-18 09:20 Define 'homeostasis' (2) Keeping a constant internal environment 1 of 15 What is affected by homeostasis regulation? (2) Enzyme activity and respiration 2 of 15 Name 4 things that homeostasis keeps the same. (4) Glucose levels, Temperature, CO2 levels, O2 levels 3 of 15 What is the job of a receptor? (1) Detects stimuli 4 of 15 What is the job of the coordination centre? (2) Receives and processes information from receptors 5 of 15 What is the job of an effector? (2) Muscle/gland which responds to restore optimum levels 6 of 15 These responses are controlled by what? (1) The hypothalamus 7 of 15 What is the purpose of sweating? (1) Evaporates away heat 8 of 15 What is vasoconstriction? (3) The flowing of blood through deeper vessels to keep warm, Causes pale skin 9 of 15 What happens to top vessels in vasoconstriction? (1) They narrow to divert blood flow 10 of 15 What is vasodilation? (3) The flowing of blood through shallower vessels to cool down, Causes flushed skin 11 of 15 What happens to top vessels in vasodilation? (1) They widen to allow blood flow 12 of 15 Human body temperature is what and why? (2) 37C as enzymes work best 13 of 15 What are the dangerous low/high temperatures for the body? (2) <35C, >41C 14 of 15 Define 'negative feedback' (2) The body maintaining conditions when a process prevents any more happening eg a hormone's secretion preventing more secretion 15 of 15
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