"Cell is the basic unit of life activities" Download PPT courseware about cells

"Cell is the basic unit of life activities" Download PPT courseware about cells

Part One: Introduction of New Course

On January 27, 2017, the world's first somatic cell cloned monkey was born in my country. It is a major breakthrough achieved by Chinese scientists after five years of research. Obtain many genetically identical cloned monkeys. Monkeys are evolutionarily closer to humans than mice and are more suitable as animal models for studying human diseases and drug experiments.

Humanity has made great achievements in biological research, but there are still many unsolved mysteries that need to be answered in cells.

Cells are the basic unit of life activities PPT, part 2 content: 1. Cell theory and its establishment process

1. Start with the anatomy and observation of the human body: Vesalius, Bixia

2. Understanding cells under the microscope: Hooke and Leeuwenhoek

3. The combination of theoretical thinking and scientific experiments: Schleiden, Schwann

4. Cell theory advances in revisions by Virchow

1. In 1543, Vesalius of Belgium published "The Structure of the Human Body". What problems did it reveal?

The structure of the human body at the organ level

2. What problems did Bichat of France point out through his anatomical observations of organs?

Organs are composed of lower-level structures - tissues.

3. Who was the first to discover cells?

Hook

4. Who was the first to observe living cells under a microscope?

Leeuwenhoek

5. What conclusions did the two scientists Schleiden and Schwann draw?

Schleiden proposed: Plant cell theory, that is, plants are composed of cells. Cells are the basic units of plants, and new cells are generated from old cells.

Schwann believes that the animal body is also composed of cells, and the ontogeny of all animals begins with the single cell of the fertilized egg.

6. What was the conclusion drawn by the German doctor Virchow in 1858?

Cells divide to create new cells.

7. The main contents of cell theory include:

1. A cell is an organism. All animals and plants develop from cells and are composed of cells and cell products;

2. A cell is a relatively independent unit, which not only has its own life, but also contributes to the overall life composed of other cells;

3. New cells are produced by the division of old cells.

Overcome difficulties

1. How did scientists obtain evidence to support the conclusion that animals and plants are composed of cells?

Scientists obtain evidence by observing biological tissues and cells.

2. Schleiden and Schwann only observed some animal and plant tissues, but concluded that "all animals and plants are composed of cells." Is this conclusion credible? Why? What significance does this conclusion have for biological research?

Believable. The two scientists selected representative materials, studied the formation and ontogeny of cells, and concluded by induction. Although only some animal and plant tissues were selected, this conclusion is credible. This conclusion made people realize that cells are the common structural basis of animals and plants, broke the barrier between botany and zoology, and gave birth to the emergence of anatomy, physiology, embryology and other disciplines.

3. “All cells are derived from preexisting cells.” Does this imply that every cell in your body embodies a long evolutionary history? Does the cell theory mainly clarify the diversity of cells or the unity of the biological world?

yes. The cell theory reveals the unity of animals and plants, thereby clarifying the unity of the biological world.

4. By analyzing the process of establishing the cell theory, what specific characteristics have you learned about scientific discoveries?

(1) Scientific discovery is the result of the joint participation and joint efforts of many scientists.

(2) The process of scientific discovery is inseparable from the support of technology.

(3) Scientific discovery requires a combination of rational thinking and experimentation.

(4) The establishment process of scientific doctrine is a process of continuous development, inheritance, revision and development.

5. What is the significance of cell theory?

1. Reveal the unity of cells and the unity of biological structure, and reveal the unity of the biological world.

2. The establishment of the cell theory marks the entry of biological research into the cellular level.

3. It laid the foundation for the establishment of the theory of evolution in the future.

Application research

1. American cell biologist E.B. Wilson once said: "The answer to every biological science question must be found in cells." The most likely reason for his conclusion is ( )

A. All life activities can occur within cells

B. Some organisms are made of one cell

C. The life activities of various organisms are completed within cells or with the participation of cells

D. Cells are the basic units of structure and function of all living organisms.

2. The establishment process of cell theory is a process of continuous development, inheritance, revision and development in scientific inquiry, which is full of intriguing twists and turns. Which of the following statements is correct ( )

A Leeuwenhoek discovered and named the cell

B Schleiden and Schwann observed living cells for the first time

C. Virchow concluded that "cells divide to create new cells."

D-cell theory reveals the unity and diversity of animals and plants

Cells are the basic unit of life activities PPT, part 3 content: 2. Cells are the basic life system

Although cells are small, their structure is complex and delicate. A cell is a complex system composed of various interactions. Cells are alive and a living system

1. Is a molecule or an atom also a system? If so, are they living systems? If not, please explain why.

Molecules, atoms, and viruses are systems, but they are not living systems because they cannot carry out life activities independently.

law:

1. Basis for judgment of a life system: whether the system can independently complete certain life activities

2. Try to use words and arrows to analyze the structural levels of the life systems of bamboo, giant panda, and paramecium, and find out their differences.

3. Do viruses belong to living systems?

law:

2. Single-celled organisms belong to both the "cell" level and the "individual" level;

3. Plants do not have a “system” level

Cells are the basic unit of life activities PPT, part 4 content: Class summary

Structural levels of living systems

1. Connections between various levels of life systems

cells, tissues, organs, systems, individuals, populations

community ecosystem biosphere

2. Cells are the most basic living system

Keywords: Free download of the PPT courseware for High School Biology Compulsory Course 1 from the People's Education Press, PPT download of cells as the basic unit of life activities, PPT download of Approaching Cells, .PPT format;

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