Eat like a bird You hear it about people who don’t eat much. People say they “eat like a bird.” Yet birds eat a larger proportion of their weight every day than even the heartiest human eaters. Birds eat a high-energy diet of seeds, fruit, worms, insects, fish or meat---maximum energy, minimum bulk. Digestion is fast and thorough. Food energy is spent in flight, in keeping warm----- in simply being a bird. What is the relationship between an animal’s metabolism and the amount of food it eats? Use a comparison between birds and humans in your answer. (look in your glossary for the word metabolism)
Eat like a bird. You hear it about people who don’t eat much. People say they “eat like a bird.” Yet birds eat a larger proportion of their weight every day than even the heartiest human eaters. - PowerPoint PPT Presentation
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Eat like a birdYou hear it about people who don’t eat much. People say they “eat like a bird.” Yet birds eat a larger proportion of their weight every day than even the heartiest human eaters.
Birds eat a high-energy diet of seeds, fruit, worms, insects, fish or meat---maximum energy, minimum bulk. Digestion is fast and thorough.
Food energy is spent in flight, in keeping warm-----in simply being a bird.
What is the relationship between an animal’s metabolism and the amount of food it eats? Use a comparison between birds and humans in your answer. (look in your glossary for the word metabolism)
Macromolecule Review
• 4 major groups
• Monomers & Polymers
• Functions
Macromolecule Review
• For each macromolecule name the monomer and give the function of each macromolecule.
Crackers? Hmmm…so sweet.• When the 1st cracker is given to you, place
it in our mouth, chew it and swallow it. Do this relatively quickly, as you normally would eat crackers.
• As you chew, describe how it tastes and feels as you chew it and swallow it.
• Record these observations on the index card under the title: “Cracker…Fast Chew.”
• After recording observations, make a new title below called: “Cracker…Slow Chew.”
Concept: Enzymes
• Lesson Essential Question: How would a change in enzyme activity affect a living system?
• To understand enzymes, we have to understand basic chemistry including chemical reactions and how living things use macromolecules to chemically obtain energy for life’s functions.
Chemical Reactions & Life
• Metabolism is all of the chemical reactions that occur within an organism.
• Your cells get energy needed for metabolism from the food you eat.
• Chemical energy is converted into a useable form.
Types of Chemical Reactions
• Extracting matter and energy from the environment
• Transporting various chemicals
• Synthesizing new biomolecules
• Moving the cell or organism within it’s environment
• Replicating the parent cell
Chemical Reactions
• Energy is stored or released by chemical reactions
• Bonds are broken and new bonds formed between atoms
• Different substances can be produced• Reactants are the starting materials for
chemical reactions• The newly formed substances are called
products.
Chemical Reactions
• Chemical reactions are summarized by chemical equations