"Cell is the unit of life activity" PPT

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"Cell is the unit of life activity" PPT

Part One: Review

1. After we used a microscope to observe the structures of plants and animals, we found out what plants and animals are made of?

All organisms except viruses are composed of cells, so cells are the basic unit of organism structure.

2. How do cells live? What is the relationship between the life activities of cells and the life activities of organisms?

Cell is the unit of life activity PPT, part 2 content: Observing amoeba

Introduction to amoeba

An amoeba is a single-celled animal. Lives in shallow water with slow flow and lots of algae. Its body structure is very simple, with only one cell in its body. The surface of the body is a very thin cell membrane, and inside the cell membrane is the cytoplasm.

Today we are going to observe the life activities of amoebas. In fact, we are observing the life activities of cells.

Amoeba is a single-celled organism, but it can display a series of life activities, including movement, eating and digestion...

The life activities of living things are all carried out in the amoeba, so cells are the basic units of life activities.

Morphological changes in amoeba

It is related to the flow and deformation of cell membranes and cytoplasm, because the body is often deformed, which is how the name amoeba comes from.

The movement and feeding of amoeba are also related to its morphological changes. It extends pseudopods to move, and it also relies on extending pseudopods to swallow food and form food bubbles.

Cells are the unit of life activities PPT, the third part: cells exchange materials with the outside world

For a cell to live normally, it needs a relatively stable internal environment, that is, the cell's materials cannot diffuse outwards at will, and external substances cannot enter the cell at will. Such as amoeba feeding.

So what structure do substances need to pass through to enter and exit cells?

(Think of the cell structure of plants and animals, and make a bold guess!)

By the way, by the way, it’s the cell membrane!

The substances exchanged between cells and the outside world include both organic and inorganic substances. And the method of exchange is also selective. That is, useful substances are absorbed and waste products are discharged from the body.

Cells are the unit of life activities PPT, part 4 content: Cells’ life activities require energy

1. What is the use of substances after they enter cells?

Substances that make up cells.

2. Can all life activities be carried out after forming a cell?

Therefore, the movement of anything requires energy, and the same goes for the life activities of cells.

Cells are the unit of life activities PPT, Part 5 content: Experimental results:

1. The nucleus is the most important structure in the cell and plays a controlling role in the life activities of the cell.

2. The nucleus is the place where genetic material is stored and replicated.

3. Cell is a unified whole

Cells are the basic units of life activities.

Summary: Multicellular animals are composed of many cells. Each cell is the same as an amoeba and can carry out life activities independently. The same is true for plants, but they use energy in different ways. Therefore, cells are the basic units of life activities of organisms.

Cells are the units of life activities PPT, part six: practice and consolidation

1. Which of the following statements is correct ( )

A. All substances in cells are made by themselves

B. Substances in cells are divided into two categories: organic matter and inorganic salts.

C. All substances can pass through the cell membrane

D. Cells are a unity of matter, energy and information

2. Chloroplasts in plant cells can not only produce organic matter, but also ( )

A. Convert light energy into chemical energy B. Convert light energy into electrical energy

C. Convert chemical energy into light energy D. Convert electrical energy into light energy

3. The structure that is said to be the engine within the cell is ( )

A. Chloroplast B. Nucleus C. Vacuole D. Mitochondria

4. The ultimate source of energy is ( )

A. Solar energy B. Chemical energy in organic matter C. Thermal energy D. Electrical energy

Keywords: Beijing Normal University version of the seventh grade biology PPT courseware for free download, cell is the unit of life activity PPT download, .PPT format;

For more information about the PPT courseware "Cells are the units of life activities", please click on the Cell PPT Cells are the units of life activities PPT label.

"Cell is the unit of life activity" PPT courseware:

"Cell is the unit of life activity" PPT courseware Part 1: Classroom experiment Experiment purpose 1. Observe the morphological structure and movement mode of amoeba; 2. Preliminarily learn how to use the high-power objective lens of a microscope. Materials and tools: amoeba culture medium, microscope,...

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Update Time: 2024-11-17

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 1 industry PPT template

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