Communication and homeostasis each person in group research one set of words e.g. text p 4, 5, 6, 7 – then share your ideas 1)homeostasis, positive feedback.

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Presentation transcript:

Communication and homeostasis each person in group research one set of words e.g. text p 4, 5, 6, 7 – then share your ideas 1)homeostasis, positive feedback and negative feedback 2)stimulus, response, internal and external environment 3)sensory receptor, effector cells and cell signalling

Homeostasis

Ectotherms and endotherms - text p why do animals need to control body temperature?

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Keeping the core temperature constant in endotherms – peripheral parts vary body temperature in warm and cold environments

thermograms

Controlling body temperature Why is it important for animals to maintain their core body temperature within certain limits? Are these animals ectotherms or endotherms? mammalsinsectsreptiles birdsamphibiansspiders State one advantage and one disadvantage of being an ectotherm rather than an endotherm; include the meaning of the two words Describe one behavioural and one physiological adaptation of locusts which help them to regulate their body temperature

Make a summary chart / poster / diagram to show how your body maintains a constant core body temperature as an endotherm (include physiological and behavioural responses) Make sure you include:- peripheral temperature receptors the hypothalamus effectors in skin, muscles and liver behaviour

Understanding skin structure

Changes in blood flow through skin so more heat is lost by conduction, convection, radiation and evaporation of sweat

Compare the food requirements of the 2 mammals per gram of body mass. Why are they different? ( P11 text)

Penguins in Australia and the Antarctic – explain if the fairy penguins would survive in the cold

Emperor penguins huddling – how does this help thermoregulation?