"The Life of Cells" Cells are the basic units of life activities PPT courseware 3

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"The Life of Cells" Cells are the basic units of life activities PPT courseware 3

1. Cell life requires matter and energy

1. Structure of matter

Conclusion: Many substances are made of molecules.

2. Substances contained in cells

Demonstration experiment: Thread a wheat seed on a wire, burn it with fire, and watch the changes in the seed.

in conclusion:

Organic matter: larger molecules, generally containing carbon (such as sugars, lipids, proteins and nucleic acids, etc.)

Inorganic substances: molecules are small and generally do not contain carbon (such as water, oxygen, inorganic salts, etc.)

3. Cell membrane controls the entry and exit of substances

Think: How does the cell membrane control the movement of materials in and out of the cell?

Consolidation exercises

1. Doctors often give critically ill patients oxygen and intravenous glucose in order to provide cells with ( ) and ( ).

2. Judgment question

①Substances that are not needed by cells must not pass through the cell membrane ( )

②The energy converters in all cells are chloroplasts and mitochondria ( )

Class summary

Cells contain organic and inorganic substances

The cell membrane controls the movement of substances into and out of the cell

Chloroplasts and mitochondria in cells are energy converters

Cell life requires both matter and energy

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Update Time: 2024-09-06

This template belongs to biology courseware People's Education Edition seventh grade biology volume 1 industry PPT template

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