A couple of high school biology questions good additions .

12. Fever to body temperature return to normal is the joint effect of neuromodulation and neuro-humoral regulation, and CO2 and H+ are called humoral regulation.

Person. 9.Lactobacillus yeast is the decomposer.

Fever to normalize body temperature is associated with fluid regulation. Thyroxine and adrenaline accelerate cellular respiration, and glucagon raises blood sugar. It's all about fluid regulation.

First of all, classmate, you asked a very good question, and I would like to express my appreciation.

Then the explanation is as follows.

1. Fructose is a reducing sugar Glucose and fructose are isomers of each other, glucose is a polyhydroxyaldehyde (aldose sugar), fructose is a polyhydroxy ketone (ketose), there is no aldehyde group in the fructose molecule, it seems that the silver mirror reaction can not occur, but in fact, the main reason is that fructose can occur two reactions in alkaline solution: one is to become aldose through enolization (the reaction equation is omitted). The second is the occurrence of cleavage, which produces organic matter containing aldehyde groups (the chemical equation is omitted).

Due to the influence of multiple hydroxyl groups on ketone groups in the fructose molecule, fructose can also undergo a silver mirror reaction and be oxidized by the newly prepared Cu(OH)2. It can be seen that the fructose solution always contains aldose and aldehyde-containing organic matter, which can react with the alkaline silver ammonia solution. Therefore, fructose and glucose are both reducing sugars.

2. No matter what the cell, the substance with the most content is water.

Adipocytes are simply more fat than others. This is a college entrance examination question.

3. There is water because it is the most accurate with crystalline water.

It's just that the first one is more accurate and the latter one is more commonly used.

Both are right.

Fructose is a reducing sugar, and fructose contains free ketone groups (because there are free ketone groups, fructose is a reducing sugar). In the glycan chain structure, the end has a -hydroxy ketone structure, and the ketone group at this time undergoes epimerization in the case of acidity or alkaline, resulting in a free aldehyde group. (That's exactly what fructose is!)

Know? It is important to be free, and sugars that are not free ketones are not reducible. The aldehyde group reacts with copper hydroxide to form carboxylic acid and cuprous oxide.

I don't know if your chemistry teacher said that you can't react spontaneously or that you can't react when heated in a water bath, but fructose and feilin's reagent can definitely react when heated in a water bath (you can do experiments).

In fact, in fat cells, the content of water is not the most, but the fat is the most. This sentence is true, in fact, this is a special case, but the middle school textbook is only updated once in 800 years, you have to understand. In middle school, you thought that the most abundant thing in cells was water!

When glucose monomers are polymerized into polysaccharides, a water molecule is lost between every two adjacent monomers, which is equivalent to each glucose (C6H12O6) decreasing one H2O to (C6H10O5). But theoretically, the two most marginal glucose monomers only lose half of the water molecule, so it would be right to add one water molecule at the end. Think about amino acids turning into polypeptides, isn't there also an amino and carboxyl group that has the conditions to combine into water?

The point is that this is the chemical formula, so ... You get the idea)

1.Did you miss the reaction conditions when you told your chemistry teacher?

Because fructose has a carbon-oxygen double bond, it can react with the film reagent (newly made copper hydroxide) when heated in a water bath to oxidize copper hydroxide to copper oxide (Cu2O), and the ketone group of fructose is reduced to a hydroxyl group.

2.If you are doing the Shanghai exam question, it is the Shanghai exam question is wrong, the biology book says that water is the main substance of the cell (this is just a common statement, in fact, fat is the substance that accounts for the most cells in fat cells).

3.Elemental composition, each substance is composed of elements, for example, the elemental composition of oxygen molecules is 2 oxygen atoms, the elemental composition contains the molecular formula, the elemental composition can have a mixture, but the molecular formula can not be written in the textbook (C6H10O5)N because the n-1 water molecules removed are insignificant and therefore ignored.

The most cellular content in adipose tissue is also water.