Warm-Up. Describe what happens to an enzyme placed at high temperatures.

Transcription

1 Warm-Up Describe what happens to an enzyme placed at high temperatures.

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3 Food (carbohydrates, lipids and proteins) is essentially many carbon atoms bound together.

4 Food (carbohydrates, lipids and proteins) is essentially many carbon atoms bound together. energy Metabolism of food means: exergonic release of energy between carbon atoms and

5 CO 2 CO 2 Food (carbohydrates, lipids and proteins) is essentially many carbon atoms bound together. Metabolism of food means: exergonic release of energy between carbon atoms and release of CO 2 as matter. energy

6 Food (carbohydrates, lipids and proteins) is essentially many carbon atoms bound together. Metabolism of food means: exergonic release of energy between carbon atoms and release of CO 2 as matter. Released energy is either: coupled to endergonic reactions, or

7 Food (carbohydrates, lipids and proteins) is essentially many carbon atoms bound together. Metabolism of food means: exergonic release of energy between carbon atoms and release of CO 2 as matter. Released energy is either: coupled to endergonic reactions, or released as heat

8 Food (carbohydrates, lipids and proteins) is essentially many carbon atoms bound together. Organisms store energy: Animals use fat (lipid) and glycogen (carb) Plants use oils (lipid) and starch (carb) Metabolism of food means: exergonic release of energy between carbon atoms and release of CO 2 as matter. Released energy is either: coupled to endergonic reactions, or released as heat

9 CTQ #1 Predict what happens to an organism which consumes more energy than is required, and predict what happens to an organism which uses more energy than it consumes.

10 Generally, the smaller the organism, the higher the rate of metabolism. low rate HIGH rate

11 Generally, the smaller the organism, the higher the rate of metabolism. Organisms regulate body temperature to maintain efficiency of metabolism and enzyme function:

12 Generally, the smaller the organism, the higher the rate of metabolism. Organisms regulate body temperature to maintain efficiency of metabolism and enzyme function: Endothermic animals keep a constant body temperature. when it s too hot when it s too cold

13 Generally, the smaller the organism, the higher the rate of metabolism. Organisms regulate body temperature to maintain efficiency of metabolism and enzyme function: Endothermic animals keep a constant body temperature. Exothermic animals body temperature depends on the environment. less active when cold more active when hot

14 Generally, the smaller the organism, the higher the rate of metabolism. Organisms regulate body temperature to maintain efficiency of metabolism and enzyme function: Endothermic animals keep a constant body temperature. Exothermic animals body temperature depends on the environment. Plants and animals time the mating season to ensure a welltimed birthing season. Ewwwwwww! Awwwwwww! Autumn Spring

15 CTQ #2 Endothermic organisms maintain a constant body temperature, whereas the body temperature of exothermic organisms matches that of the environment. Predict which kind of organism requires more energy on average to maintain homeostasis, and justify your prediction.

16 Closure Describe TWO examples of mechanisms by which animals maintain thermal homeostasis.