examples of inorganic compounds
Does not officially go to class, I called the first meeting preparation, well, prepare it, is really very troublesome thing, and engage in ppt take a long time ah! Do not know can not pass it! Keep up the bar, as well as Section!
Section organisms in inorganic compounds
First, the teaching objectives
1. To say the presence of water in the cell form and function.
2. To say the presence of inorganic form in the cell and the main role.
Second, the teaching points
: Water and salt's role in the cell.
Third, the difficulty of teaching: (1) the role of water (2) the role of inorganic salts.
Fourth, writing on the blackboard design
First, the water
1, Contents: (85-90%)
(1) cells accounted for most compounds. (All cells are the same.)
(2) aquatic> terrestrial
(3) young> adult
2, there exists in the form
An important component of cell structure
Good solvent 95.5%
Participate in biochemical reactions
Second, the inorganic salts: (1-1.5%)
1, there exists in the form: ion
2, the action
Compounds composed of cells
Life activities to maintain normal cell
Maintenance of water and salt balance
Maintaining acid-base balance
Fifth, the teaching process
I do not know on television, there is no such Gatorade to do an ad, advertising, advertising inside the word "solution thirsty, but also the disintegration of thirst," what would that mean? We all know that, under normal circumstances, we need only solution thirsty to drink water on it, then what is the disintegration of thirst does that mean? In the time to do strenuous exercise, the body of water in addition to the loss, the loss will be out a lot of sweat sodium, potassium, magnesium, sugars, etc., so sports drinks often include the following elements. We see this table, where carbohydrate is to allow athletes to replenish energy, while the citric acid and lemon flavor seasoning mainly played a role. Then the following are of these types of inorganic salts, inorganic salts to add to the body losing ion. So solution is to add water thirsty, but thirst is to add the disintegration of the body's energy source and some inorganic ions. Water and inorganic salts belong. Is content to learn today.
First, we look at a picture, to be will ask students to answer, along with these pictures shows what kind of problems?
These instructions of the "water of life play an important role in the activities."
Recall that a cell in which the highest levels of compounds?
Yes. Cell water content can reach 85% -90%, the highest concentrations of all compounds. This is the first characteristic of water content.
2, we look at these types of comparison of water content in vivo, these data illustrate what kind of problems?
Yes, jellyfish can reach 97% water content, road mammals born relatively less water, but can reach 70%. Different water content in vivo is different. This is the second feature of the water content.
3, ask: it is not the same water content in vivo to the same out?
4, the following is a comparison of water content in different organs of the body map, what does this illustrate?
Water content in the blood can reach 83%, while the water content of teeth, only 10%, indicating that even within a single living body water content in different organs and tissues will be different.
The introduction of water exists in the form
Please representative of the class is that physics in the presence of water in the form of nature.
The water in the world, there are macro-vapor, liquid and solid forms of these three. Then the cells in the presence of water and which form of it?
ã€Showã€‘ Form comparison: the blood was liquid like water, and heart is the solid state was tough, but both are very close to the water content, indicating that cells in the presence of water, there are different forms.
Cells in the presence of water forms are there? What each function.
Cells in the presence of water in two forms, are called bound water and free water. With water the name suggests, is often associated with other substances within the cell a combination of water, accounting for all the cells of 4.5% water. The water can not flow freely, is important to cell structure components. For example, when breaking fresh eggs in fresh water and egg white protein binding together to form a liquid gel, this structure was destroyed when the cells. Therefore, the integration of water is an important component of cell structure, it gives a variety of tissues, organs, certain shape, hardness and elasticity. Therefore, myocardial water content, though many, there are still tough state.
And free water, that is that cells are free flowing water, these water to free form, accounting for all water cells to 95.5%. For example, we cut the watermelon out of the water when the flow is free water in the cells. Free water, what kind of functions?
1, when we eat watermelon sweet reason will feel inside cells due to watermelon sugar dissolved in cell free water, taste. There are many substances in vivo are dissolved in water. Therefore, the free water of the first role: a good solvent cells.
Learned in junior high school memories of photosynthesis and respiration, must not participate in the water?
Water is the raw material of photosynthesis, respiration and some organic compounds in the synthesis and decomposition of water molecules participate in both. Dehydration condensation such as protein, polysaccharide hydrolysis and so on. So I can get free water and the second function, in biochemical reactions. Without water, these important biochemical processes are not possible.
3 we try to think, what kind of human blood functions?
Yes, blood in the water main is a combination of water, it can flow freely, which can transport dissolved nutrients to each cell, but again transport the waste generated by cell metabolism to the excretory organs or shipped directly to the body. Therefore, the third by the role of free water: transport of nutrients and waste
Combination of two forms of water and free water
Free water and bound water
Transition: cell free water and bound water is not constant it? They do not. Under certain conditions they can be transformed. Example.
When animals hibernate (the picture shows hibernating bears), the body's biochemical reaction is to slow down or speed up should it?
The animal in order to make the food we eat to maintain them through the long winter, to try to slow down the body's biochemical reactions. As we know, is mainly involved in cellular biochemical reactions in the free water, then we think about what should be the kind of water into the water ah?
After the winter, animals waking up, this time gradually speed up biochemical reactions in vivo, then this time what they should be what the water to convert water into ah?
Question: seed germination and dormancy, the combined water and free water is also how changes?
Summary: When life activity strong, the bound water to free water conversion; the other hand, when the slow life activities, free water to bound water transformation.
Results and water to free water
Bound water to
Existing forms of inorganic salts, the content
Transition: We have just solved the Gatorade with the "solution thirsty," the reason we said that the disintegration of thirst is one of the reasons is because of its ability to complement the body's salts.
1, the water in the cell to combine water and free water in the form, then the inorganic salts in the cell and form what is it? We see the penultimate paragraph of textbooks surface 35, to draw out some of the bold. Most cells in the form of ionic salts. For example, sodium chloride cells, is to Na and Cl-in the form of. There are more cations other content, K +, Ca +, Mg +, Fe and so on. There anion Cl-, SO42-, PO43-, HCO3-and so on.
2, the water content in the cell is the largest, accounting for about 85 ~ 90%, then the salt content in the cell is how much? We see this form. That cells in inorganic salt content is very small, only about 1 to 1.5%. Inorganic salt content of so little, very small feature is not it?
The role of inorganic salts
Think about the following few questions.
Why will lead to iron deficiency anemia iron deficiency?
Why magnesium deficiency may affect photosynthesis?
Why do a lot of salt is iodized salt it?
Can you think of the body salt shortage that cause disease?
Summary: Fe hemoglobin in red blood cells constitute an important element of, lack of Fe will lead to hemoglobin synthesis blocked, thus, lack of Fe can cause iron deficiency anemia.
Chloroplast magnesium constitute an important component of chlorophyll, chlorophyll synthesis of magnesium deficiency will lead to obstacles, and photosynthesis can not do without chlorophyll, which will affect the photosynthesis of magnesium deficiency.
In both examples, Fe is a form of hemoglobin components, which constitute the chlorophyll composition of magnesium. As a result, we can get the first role of inorganic matter to form cells in the compound.
Iodine deficiency can cause what disease?
Rating: iodine deficiency causes endemic goiter, mental retardation may also lead to shorter cretinism. In order to prevent this disease, we eat iodized salt.
Asked: iodine intake is not the better it?
Rating: Excessive intake of iodine can cause hyperthyroidism, hyperthyroid patients to eat no matter what would feel hungry stomach. From this we can draw the two salts role: to maintain the normal activities of life organisms. This effect of inorganic salts in mind is not reflected in the more lines, less is not OK, but should be maintained at a relatively stable state.
Patients with acute gastroenteritis to salt saline (0.9% NaCl solution).
More examples of what kind of salt effect?
Evaluation: is to maintain water and salt balance in vivo. This shows that there is another effect of inorganic salts, is to maintain water and salt balance.
ã€Showã€‘ human blood pH value of the constant in the 7.35-7.45
. The pH constant phenomenon called acid-base balance. This is due to Na +, HCO3-, HPO3-such as the role of inorganic ions.
This in turn shows what kind of salt effect?
Evaluation: to maintain acid-base balance. This is the fourth role of inorganic salts.
Convulsions, rickets, etc.
Great neck disease
Summary and Exercises
Could cite only with C, H Examples of inorganic compounds of elements? Reward points: 0 | solution time :2010-9-9 18:17 | Asked by: best answer any 010 103
Not ~ contain only hydrocarbon compounds collectively known as hydrocarbons, in the classification of all belongs to organic matter. Help one answer to my time :2010-8-27 18:09 | Comments to the TA for help
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