"Dynamic Balance of Substances in the Body" PPT download

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"Dynamic Balance of Substances in the Body" PPT download

Part One: Utilization of Nutrients

1. Utilization of sugars

2. Utilization of fat

3. Utilization of protein

4. Energy in the body

According to the relationship between energy acquisition, consumption and storage: if it is a normal adult, the relationship is ( ); if it is a person who has been ill for a long time and does not eat, the relationship is ( ); if it is a teenager, the relationship is ( )

A. Energy gain is greater than energy consumption

B. Energy gained is equal to energy consumed.

C. Energy gained is less than energy consumed.

What are the consequences if a person overdiet?

Excessive dieting can lead to excessive weight loss, affect the body's normal growth and development, and reduce resistance to disease.

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

1. Composition of urinary system

2. Structure of the kidneys

(1) The shape of the kidney

Located on both sides of the spine at the back of the human waist, one on the left and one on the left. It looks like broad beans and is reddish brown.

(2) Nephron

Basic structural and functional unit of the kidney

3. The formation process of urine

As blood flows through the kidneys, it passes through tiny "filters"

-The nephrons work to form urine.

4. The meaning of urination

①Remove waste.

②Regulate the balance of water and inorganic salts and maintain the normal physiological functions of tissue cells.

When a person's kidney function has certain obstacles and cannot excrete metabolic waste such as urea dissolved in water in a timely manner, the human body will be poisoned or even die.

For patients with severe renal dysfunction, modern medicine mostly uses artificial kidneys and kidney transplants to maintain life.

Dynamic balance of substances in the body PPT, part 3: thinking and discussion

1. A healthy person produces about 150 liters of original urine every day, but only excretes about 1.5 liters of urine every day. What is the reason?

Due to the reabsorption of the renal tubules, substances useful to the human body in the original urine, such as most of the water, all of the glucose, and some of the inorganic salts, are absorbed by the renal tubules.

2. Urine is produced continuously, but urination is intermittent. Why?

Because the bladder temporarily stores urine, when it is full, the urethral sphincter is stimulated and produces a defecation reflex.

3. What will happen if people often hold back their urine?

① Affect the function of the bladder and cause damage to the sphincter.

② Failure to discharge urine in time may cause poisoning due to uric acid and urea in the urine.

③It will also affect the function of the kidneys.

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

1. The human urinary system is composed of _____, ______, ____ and ______ and other organs. The formation of urine is mainly through the functions of ______ and ________ of the nephron.

2. People generally urinate less in summer. This is because----()

A. Less waste in the body

B. The body needs a lot of water

C. Excessive sweat secretion

D. Metabolic waste in the body is mainly excreted through the skin

3. When the original urine flows through the renal tubules, the substances in the original urine that will not be reabsorbed by the renal tubules are---- ( )

A. Water B. Glucose C. Inorganic salts D. Urea

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"Dynamic Balance of Materials in the Body" PPT courseware:

"Dynamic Balance of Substances 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 consistent...

"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: 2024-06-30

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

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