"Inorganic Substances in Cells" PPT courseware of molecules that make up cells

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"Inorganic Substances in Cells" PPT courseware of molecules that make up cells

Part One: Introduction of New Knowledge

Jellyfish 97% Algae 90% Fish 80%~85%

Frogs 78% Higher plants 60%~80% Mammals 65%

Different organisms have different water contents

The same species of organisms have different water contents at different times.

Inorganic substances in cells PPT, part 2: new knowledge explanation

Thoughts and discussions:

1. Compared with fresh seeds and dry seeds, which seed has a stronger metabolism in the same suitable environment?

Fresh seeds are easier to germinate than dry seeds. Germination requires metabolism, which means that fresh seeds have a stronger metabolism.

Tip: The ratio of free water to bound water in fresh seeds is larger than that in dry seeds. Please consider the physiological functions of free water and bound water.

2. Compared with fresh seeds and dried seeds, which one is more resistant to stress when placed in a cold environment?

Fresh seeds are more perishable than dry seeds in the same environment, have more free water content, more vigorous cell metabolism, and consume more organic matter, resulting in weaker stress resistance of fresh seeds.

Tip: Stress resistance refers to certain traits of plants that can resist adverse environments.

Inorganic substances in cells PPT, Part 3: Classroom exercises

Judgment: In what form does water mainly exist in the following examples?

(A) The water that flows out when cutting watermelon

(B) Water lost when fresh wheat seeds are dried

(C) Water lost during baking of wheat

(D) Water in egg white

1. When wheat germinates, the ratio of free water to bound water in the cell ( )

A. Increase B. Decrease

C. Unchanged D. Unable to judge

2. The water lost during the drying process of soybean seeds and the process of frying dry seeds into edible "crispy beans" are respectively ( )

A. Bound water and free water B. Free water and bound water

C. Both are free water. D. Both are bound water.

Inorganic substances in cells PPT, part 4: expansion and improvement

1. The following is a statement about the water content in cells. The incorrect one is ( )

A. Water is the most abundant compound in human cells

B. Plant cells with strong metabolism contain higher amounts of free water.

C. The free water content in the cells of overwintering plants is relatively high.

D. The cells of the elderly contain less water than those of infants.

2. A type of substance that contains very little content in cells, but is an important part of cell structure and can maintain the life activities of cells and organisms is ()

A. Water B. Inorganic salts C. Vitamin D. Nucleic acid

Inorganic substances in cells PPT, Part 5 content: Class summary

Cells are living systems composed of various elements and compounds.

The content and proportion of these compounds in living cells are constantly changing, but remain relatively stable to ensure the normal progress of cell life activities.

Humanity himself!

Human beings and all creatures in nature share the same water circulation system. Water is so important to living organisms. Human beings cannot sacrifice the water environment for immediate convenience and benefit. Otherwise, humans will eventually be severely punished by nature!

It is my responsibility to care for the environment!

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For more information about the PPT courseware "Molecules Composing Cells and Inorganic Substances in Cells", please click the Molecules Composing Cells ppt Inorganic Substances in Cells ppt tag.

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Update Time: 2024-10-20

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