"Basic Structure and Function of Cells" PPT

Description

"Basic Structure and Function of Cells" PPT

Part One: Discussion of Problems

question:

1. Which of the pictures you observed are living things and which are not?

2. What are the common characteristics of living things?

discuss

Why do so many different creatures show similar life characteristics?

It turns out that most living things except viruses are composed of cells, and cells are the basic units of life activities.

PPT on the basic structure and function of cells, part 2: learning new knowledge

1. Unicellular organisms and multicellular organisms

1. Unicellular organisms: organisms with only one cell, such as Chlamydomonas and Paramecium.

2. Multicellular organisms: Most organisms are composed of many cells. Such organisms are called multicellular organisms.

2. Structure and function of microscope

microscope

Optical microscope

An optical microscope is an instrument that uses light illumination as a light source to magnify the image of tiny objects. Its minimum resolution is 0.2 μm. In fact, bacteria and mitochondria, about 0.5 μm in size, are the smallest objects that can be clearly seen under a light microscope.

electron microscope

Basic structure and function of cells PPT, Part 3: Using a microscope

Activity: Practice using a microscope

Purpose requirements

Practice using the microscope correctly.

Materials and tools

Microscope, mounting slides or sections, lens cleaning paper, gauze.

Method steps

1. Take the mirror and place it

Hold the mirror arm with one hand, support the mirror base with the other hand, and place the microscope slightly to the left of the experimental table.

2. Aiming at the light

3. Place the slide specimen and adjust the focus

4. Observation

5. Retract and release

Basic structure and function of cells PPT, part 4: review and thinking

1. What are the steps to use a microscope?

2. What issues should be paid attention to when using a microscope?

3. Is the text upside down in the field of view?

4. Name some of the names and functions of a microscope?

PPT on the basic structure and function of cells, Part 5: Consolidation exercises:

1. When using a microscope, you should use one hand to hold the microscope and the other to hold it in a ___ position on your experimental table, and then install it __________.

2. When aiming at the light, turn the converter so that the ____ magnification mirror is aligned with ________, and turn the shutter so that a larger _________ is also aligned with __________. Gaze into _______ with your ____ eyes, open your ____ eyes, and then adjust _________ with your hands until you see a bright field of vision.

3. Turn the ___ focusing screw to lower the lens barrel _______ until the objective lens is close to the slide specimen.

4. Why must the eyes look at the objective lens when the lens barrel is lowered?

because__________________________

5. Turn the ____ focus screw in the ____clockwise direction to slowly raise the lens barrel until the object image is clearly visible. Then turn the ____ focusing screw slightly to make the object image you see clearer.

6. If the object image is to the lower left, you should move the specimen to _____ to center the object image.

Keywords: Beijing Normal University version of the seventh grade biology PPT courseware for free download, basic structure and function of cells PPT download, .PPT format;

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"Basic Structure and Function of Cells" PPT courseware:

"Basic Structure and Function of Cells" PPT Courseware Part One: Situation Introduction Scientific research shows that in the biosphere, some organisms have only one cell, such as Chlamydomonas and Paramecium. Most living things are made up of many cells. It can be seen that cells are the...

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Update Time: 2024-10-20

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

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