Margaret M. Loos
THE HUMAN CELL: AN ENERGY SYSTEM
Objectives:
1. To understand the common features of animal cells.
2. To recognize the functions of life common to all cells.
3. To relate these functions to a model of an energy system.
Introduction:
When you feel tired or haven’t had food to supply your body’s needs you say you feel like you don’t have any energy. What do you do to get rid of this feeling? You have to rest and replenish the energy to 30 to 100 trillion cells. 30,000,000,000,000 cells. These cells are complete little systems that work together to make your body go. We will now learn the parts of a cell and their functions (jobs).
Procedure:
The words on the board are some parts of a cell. We will use some of them more than once. Place list on board.
List
A.
Three major parts of all animal cells
Cell
Cell Membrane
Cytoplasm
E.R. (Endoplasmic Reticulum)
Golgi Body (Apparatus)
Lysosomes
Membrane Proteins
Microtubules
Mitochondria
Nucleus
Proteins
Ribosomes.
Free
and on
E.R
.
Pinocytosis (methods of taking)
Phagocytosis (in materials)
(figure available in print form)
Label: Organelles of the Cell:
(figure available in print form)
Questions
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1. Can this cell exists without anything coming in? Why or why not?
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2. What would happen if nothing left the cell? If the waste products remained, what would they do to the cell? Is this a form of pollution?
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3. What does the cell need to survive? Reproduce? To grow?
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4. Could this cell exist without other cells? Why or why not?
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5. What do the mitochondria supply that the cell needs to do its work?
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6. How can cells get rid of waste materials?
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7. How can the body get rid of waste materials?
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8. How can the world get rid of waste materials?
THE CELL AS AN ENERGY SYSTEM
:
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Input:
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solid _______
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Fuel. Potential energy in chemical form.
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gas _______
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Unites to “burn” fuel.
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liquid _______
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Chemical activity only occurs between materials in solution.
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Cell Activity:
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_______
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Breaking down of complex substances.
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_______
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Building up of new substances.
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_______
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Combination of the two.
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_______
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Necessary to do work.
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Output:
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_______ Materials produced to be used in other parts of the body.
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_______ Solid, liquid and gaseous materials that must be disposed of by the body eventually.
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