"Energy Acquisition" PPT

"Energy Acquisition" PPT

Part One: Learning Objectives

1. Explain the meaning of cellular respiration and understand that the oxidative decomposition of organic matter is the source of energy required for life activities;

2. List examples of anaerobic respiration in humans and plants, and compare its similarities and differences with aerobic respiration;

3. Give examples to illustrate the different ways in which animals living in different environments obtain oxygen.

Energy acquisition PPT, part 2: respiration

Food is the source of energy for the human body. Do you know how food provides energy for the human body?

Respiration: The process in which organic matter is oxidized and decomposed under the catalysis of enzymes in cells to release energy.

1. Aerobic respiration

Do you remember the chemical reaction formula for the oxidative decomposition of sugars?

With the participation of sufficient oxygen, cells completely oxidize and decompose organic matter to generate metabolic end products such as carbon dioxide and water, and at the same time release energy.

2. Anaerobic respiration

Under anaerobic conditions, cells decompose organic matter into incomplete oxidation products and release energy.

How will your legs feel if you run vigorously for a short period of time after not exercising for a long time? Why?

A.Animals:

Why does this feeling of soreness gradually disappear after resting?

B. Plants:

Higher plants can also perform short-term anaerobic respiration to produce alcohol when flooded.

If apples are stored for a long time, the smell of wine will come out.

C. Microorganisms

Microorganisms can also perform anaerobic respiration, such as yeast fermentation and wine making.

Yeast can respire both aerobically and anaerobically.

Some microorganisms can only survive in anaerobic conditions

Energy acquisition PPT, the third part: various respiratory organs

Animals rely on oxygen and food to maintain life. Animals living in different environments obtain oxygen in different ways.

person → lungs

frog → lungs and skin

fish → gills

grasshopper

Energy acquisition PPT, Part 4: The meaning of cellular respiration

1. Provide energy for the life activities of organisms

Part of the energy released by cellular respiration is converted into heat energy and lost; the other part can be used for various life activities such as cell division, mineral absorption, muscle contraction, nerve impulses and impulse conduction.

2. Provide raw materials for the synthesis of other compounds in the body

Some intermediate products produced during cellular respiration can become raw materials for the synthesis of some important compounds in the body. For example, pyruvate can synthesize alanine through amino conversion.

Energy acquisition PPT, part 5: practice in class

1. Which of the following is not a result of respiration ( )

A. Release carbon dioxide B. Produce oxygen

C. Release energy D. Produce water

2. Compared with anaerobic respiration, the characteristics of aerobic respiration are ( )

A. Requires the participation of enzymes B. Decomposes organic matter

C. Release of energy D. Complete oxidation of organic matter

3. Respiration is a common feature of living things, and its fundamental reason is ()

A. All life activities require energy

B. Water produced by respiration is necessary for life activities

C. Life activities require oxygen at all times

D. Carbon dioxide produced by life activities must be discharged in time

4． The place with the highest concentration of carbon dioxide in the human body is ( )

A. Alveoli

B. Peri-alveolar capillaries

C. Tissue cells

D. Capillaries surrounding tissue cells

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