"Dynamic Balance of Materials in the Body" PPT courseware

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"Dynamic Balance of Materials in the Body" PPT courseware

Part One: Utilization of Nutrients

Question: Do you know how the three major nutrients, sugar, fat, and protein, are used in the human body?

Under normal circumstances, the source and outlet of blood sugar can remain relatively balanced, thereby keeping blood sugar levels within a relatively stable range.

Thinking: Apart from food, where else can the sugars that provide energy come from?

In addition to partly coming from food, carbohydrates can also come from the decomposition of glycogen and the conversion of fat and protein.

Carbohydrates, fats and proteins are constantly being synthesized and decomposed in human tissues, and new and old substances are constantly replaced. At the same time, the human body needs a large amount of oxygen every day to oxidize and decompose various nutrients to generate enough energy to maintain life activities.

Dynamic balance of substances in the body PPT, part 2: urinary system

When the human body uses nutrients to obtain energy and synthesize new body components, it will produce some waste (carbon dioxide, urea, etc.). These wastes are excreted through the urinary system and skin, and most of them are excreted through the urinary system in the form of urine. in vitro.

The process of excreting carbon dioxide, urea and excess water produced when substances in the human body are decomposed is called excretion.

Route of excretion:

(1) Urinary system: water, inorganic salts, nitrogenous waste (80%)

(2) Skin (sweat): water, inorganic salts, nitrogen-containing waste (10%)

(3) Respiratory system: carbon dioxide, water (10%)

The filtration process of the kidneys - the formation of urine

1. Glomerular filtration

The glomerulus and the wall of the renal capsule close to it play a filtration role. When the blood flows through the glomerulus and the wall of the renal capsule, in addition to blood cells and macromolecule proteins, part of the water and inorganic salts in the blood Substances such as glucose and urea can be filtered through the glomerulus into the renal capsule to form original urine. The human body produces approximately 150 liters of raw urine every day.

2. Renal tubular reabsorption

When the original urine flows through the renal tubule, all the glucose, most of the water and some inorganic salts are reabsorbed by the renal tubule wall. These reabsorbed substances enter the capillaries surrounding the renal tubule and are returned to the blood. The remaining water, inorganic salts, urea and other substances form urine. The human body excretes about 1.5 liters of urine every day.

Dynamic balance of substances in the body PPT, part 3: water and salt balance

Salt balance in the human body

The fluid around human cells, body fluid, contains a certain amount of inorganic salts, and their content must remain relatively stable for cells to live normally.

Question: How does the human body obtain salt? What are the ways through which salt is excreted from the body?

Thinking: Why do people need infusions when they suffer from severe diarrhea and severe vomiting?

When a person suffers from severe diarrhea and severe vomiting, a large amount of water and inorganic salts are lost in the body, which urgently needs to be replenished from the outside. In addition, due to gastrointestinal dysfunction and weak digestion and absorption capabilities, the best way is not to take it orally, but Replenish water and inorganic salts in the body by injecting saline.

Dynamic balance of substances in the body PPT, Part 4: Metabolism

1. Concept: The exchange of matter and energy between living organisms and the external environment and the transformation of matter and energy within organisms.

2. Two aspects of metabolism

Assimilation

Alienation

3. The relationship between assimilation and dissimilation:

Simultaneous, closely related, and constantly self-renewing.

Alienation cannot proceed without assimilation, which provides the material for alienation;

Assimilation cannot proceed without alienation, which provides the energy for assimilation.

4.The meaning of metabolism

Metabolism is the basic condition for biological survival and the most basic feature of life. Once metabolism ceases, it means the end of life.

Keywords: Zhejiang Education Edition ninth grade science PPT courseware free download, dynamic balance of substances in the body PPT download, .PPT format;

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"Dynamic Balance of Substances in the Body" PPT download:

"Dynamic Balance of Substances in the Body" PPT Download Part One: Utilization of nutrients 1. Utilization of sugars 2. Utilization of fats 3. Utilization of proteins 4. Energy in the body According to the relationship between energy acquisition, consumption and storage: If He's a normal adult...

"Dynamic Balance of Materials in the Body" PPT (second lesson):

"Dynamic Balance of Substances in the Body" PPT (Second Lesson) The first part of the content: review the past and learn the new. Urine excretion: kidneys, ureters, bladders and urethras. The meaning of urination: ① eliminate waste. ②Regulate the balance of water and inorganic salts and maintain the normal physiological functions of tissue cells. when..

"Dynamic Balance of Materials in the Body" PPT (first lesson):

"Dynamic Balance of Substances in the Body" PPT Part One Content: New Lesson Introduction The three major nutrients in food are _____, _____, and _____. How are the three major nutrients used in the body? Learning Objectives 1. Name the functions of carbohydrates, fats, and proteins in the human body..

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Update Time: 2024-06-29

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 1 industry PPT template

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