What are the effects of histamine within the scope of high school knowledge

Histamine wasn't specifically introduced in high school. This is the knowledge in college textbooks, and I believe it is quite easy to understand.

Histamine is associated with focal inflammatory responses of the body's immune system, as well as allergic reactions.

When allergens enter the body, they cause a large number of specific antibodies to be synthesized, and these antibodies bind to mast cells, etc. When these cells bind to the antigen again, they release cell products such as histamine. These substances have a strong effect of stretching blood vessels and constricting smooth muscles, which can lead to symptoms such as redness and swelling, asthma, runny nose, mucosal edema, and severe anaphylactic shock.

When the ** is broken, it often causes a focal inflammatory reaction. It has four symptoms: pain, redness, swelling, and fever.

When **broken, the blood vessels and cells are destroyed, and the release of vasodilatory kinin makes the arterioles and capillaries in the injured area dilate, expand, and turn red;The permeability of the capillaries increases, proteins and fluids escape, and swelling is formed locallyAt the same time, the local body temperature rises, which can strengthen the phagocytosis of leukocytes and reduce the number of invading microorganisms.

That's all I know, I hope mine satisfies you.

In high school, histamine was only found in the allergic part.

It is a substance secreted by the cells in the allergic area during an allergic reaction, which will make **redness, swelling, bronchiectasis, or something, anyway, it can be said that allergic symptoms are basically caused by it.

The role ......It can be understood as a reminder that you are allergic.

This statement is wrong.

Secreted protein Definition: A protein that is synthesized in the cell and secreted outside the cell. For example:

Salivary amylase, pepsin, digestive enzymes, antibodies and a portion of hormones. Note: Respiratory enzymes, for example, are not secreted proteins.

But if it is changed to: "Not all enzymes are secreted proteins", that would be correct.

There are a lot of them, such as protease, amylase.

Digestive enzymes such as pepsin are secreted proteins.

Now there are college students and secondary school students in the society. There are a lot of undergraduates, postgraduates, and doctoral students, and there are too many high school students. High school students have learned that these knowledge are the most basic knowledge, and they are very useless in social practice.

The knowledge of a high school student is at the bottom of the society, and he can only be engaged in migrant workers or sales, waiters and other positions! Girls can go to work as clerks!

What is the status of the scope of knowledge in society? It has a certain status.

You should choose A, and there are three correct ones.

Mistakenly, enzymes are proteins or DNA, which are large molecules. But some hormones, such as thyroid hormones, are small molecules. Neurotransmitters also have small molecules.

Mistake. Hormones are trace amounts of organic matter, enzymes are mainly found inside cells, and neurotransmitters are mainly found in tissue fluid.

Mistake. The latter two may have receptors present on the cell membrane.

That's right. Mistake. Enzymes are produced by living cells, hormones are produced by secretory cells, and neurotransmitters are produced by nerve cells, so cells that can produce enzymes may not necessarily produce hormones, and hormone-producing cells do not produce neurotransmitters in tidine.

That's right. Proteases, for example, break down insulin.

That's right. The vast majority of enzymes are proteins, and some hormones promote protein synthesis.

There should be three pairs.

It's okay to judge, except for the one where the enzyme has a receptor on the cell membrane, and the rest of your judgment is right.

High School Mathematics Compulsory 1: Mainly Basic Functions. 1.the concept of sets and functions; 2.Basic elementary functions: exponential function, logarithmic function, power function; 3.The application of functions.

High School Mathematics Compulsory 2: Mainly in Spatial Geometry. 1.space geometry; 2.positional relationships between points, lines, and planes; 3.Lines and Equations; 4.Circles and equations.

High School Mathematics Compulsory 3: Mainly Probability and Statistics. 1.Preliminary algorithms; 2.Statistics; 3.Probability.

High School Mathematics Compulsory 4: Mainly trigonometry and planar quantities. 1.Trigonometric function; 2.planar vectors; 3.Trigonometric identity transformations.

High School Mathematics Compulsory 5: Mainly number sequences and inequalities. 1.Solving triangles; 2.Sequence; 3.Inequality.

High School Math Elective 2-1:1common logical terms; 2.conic curves and equations; 3.Space vectors and solid geometry.

High School Math Elective 2-2:1derivatives and their applications; 2.Reasoning & Proof; 3.The expansion of the number system and the introduction of complex numbers.

High School Math Elective 2-3:1Counting principle; 2.random variables and their distributions; 3.Statistical cases.

Analysis of the classification of key knowledge and conclusions of high school mathematics.

Chapter 1: Sets and Simple Logic.

Chapter 2: Functions.

Chapter 3: Sequences.

Chapter 4: Trigonometry.

Chapter 5: Planar Vectors.

Chapter 6: Inequality.

Chapter 7: Equations for Straight Lines and Circles.

Chapter 8: Conic Equations.

Chapter 9: Straight Lines, Planes, Simple Geometry.

Chapter 10: Permutations, Combinations, and Probabilities.

Chapter 11: Probability and Statistics.

Chapter 12: The Limit.

Chapter 13: Derivatives and Differentiation.

Chapter 14: Plural.

This is a list of all the math you need to learn in three years of high school.

The 5 high school textbooks are all about this.

At present, there are many provinces that implement independent propositions in the college entrance examination, and the textbooks used in various places are not the same, so the college entrance examination.

Emphasis will vary from province to province.

According to the trend of the national paper of the college entrance examination in recent years.

Trigonometric functions must be a big question, accounting for about 20 points in total.

The three-dimensional set must produce a big question, a total of about 20 30 points, a total of about 20 30 points, a total of about 20 30 points column must produce a big question, a total of about 20 points.

Permutations and combinations and probabilities must be a big question, accounting for about 20 points in total, but the content related to probability has been deleted from the textbooks in some areas.

In addition, functions and inequalities are the content that runs through the entire high school stage, and it can be said that there is a connection with any knowledge in the high school stage, which is basically involved in every question in the college entrance examination, and often appears independently as a big question, and the score value can be said to be incalculable.

What's the point? I think analytic geometry is quite important, and it's also quite difficult, and the final finale of the college entrance examination is often it, and mastering it back is equivalent to mastering the college entrance examination.

In addition, trigonometric functions are a bit engaged, but as long as you do more, you will always be able to memorize the formula, because it is just these few routines; Probability and expectation, variance, solid geometry, and number series are the key points to be scored in the college entrance examination, and functions are also a key point in the college entrance examination.

The number of triangular letters must come up with a big problem, a total of du

It takes about 20 minutes.

Three-dimensional collection. zhi must have a big DAO question, a total of about 20 30 points of analysis set must have a big question, a total of about 20 30 points column must have a big question, a total of about 20 points.

Permutations and combinations and probabilities, there must be a big question, a total of about 20 points Functions and inequalities are the content throughout the high school stage, it can be said that there is a connection with any knowledge in the high school stage, and it will basically be involved in every question in the college entrance examination, and often appear independently as a big question, and the score value can be said to be incalculable.

Common formulas and conclusions in high school mathematics

Although physics is a science subject, it is also a highly theoretical subject, with many laws and concepts, many students feel that physics is difficult, and they are confused when they take the exam, largely because the basic knowledge concepts are confused!

In the process of reviewing before the exam, you should still base yourself on the textbook and grasp the foundation. Today, we have sorted out the knowledge points that must be memorized before the exam, and you must collect them and take a good look

Force is the interaction between objects.

1.The SI unit of force is Newton, denoted by n;

2.Diagram of force: a directed line segment with an arrow indicates the magnitude, direction, and application point of the force;

3.Schematic diagram of force: the direction of the force is represented by a line segment with an arrow;

4.According to the nature, force can be divided into: gravity, elastic force, friction force, molecular force, electric field force, magnetic field force, nuclear force, etc.;

Gravity: The force experienced by an object due to the attraction of the earth to it;

a.Gravity is not gravitational but a component of gravitational force;

b.The direction of gravity is always straight downwards (perpendicular to horizontal downwards).

c.The instrument used to measure gravity is a spring scale;

d.The center of gravity is the equivalent point of gravity of each part of the object, and only the center of gravity of the object with regular geometric shape and uniform mass distribution is its geometric center.

Elastic force: the force exerted by the deformed object on the object in contact with it in order to restore the deformation;

a.Conditions for the production of elastic force: the two objects are in contact and have deformation; The deformation of the force object produces elastic force;

b.Elastic force includes: support force, pressure, thrust, pull, etc.;

c.The direction of the support force (pressure) is always perpendicular to the contact surface and directed towards the object being supported or compressed; The direction of the pulling force is always along the direction of contraction of the rope;

d.Within the elastic limit, the elastic force is proportional to the deformation; f=kx

Friction: When two objects in contact with each other have relative motion or relative motion tendency, the force that hinders the relative motion of the object is called friction;

a.Conditions for the occurrence of frictional force: object contact, surface roughness, extrusion, relative motion or relative motion tendency; If there is elasticity, there is not necessarily friction, but if there is friction, there must be elasticity between the two things;

b.The direction of friction is opposite to the relative motion (or relative tendency of motion) of the object;

c.The magnitude of the sliding friction fslip = the magnitude of the fn pressure is not necessarily equal to the gravitational force of the object;

d.static method); Vector;