Several problems in the regulation of biological homeostasis in the second year of high school

First of all, your fourth question The first line of defense of the human body is**and the mucous membrane Sweat is**secreted **Direct exposure to the air The human stomach belongs to the external digestive tract It can also be understood as exposure to the air Gastric acid is stored in the stomach So they are the first line of defense of the human body.

A. Needless to explain, B blood glucose refers to the amount of glucose in the blood plasma, and C cellular respiration produces CO2 into the interstitial fluid through free diffusion. D is an inorganic salt in the inner environment and is involved in nerve cell potential conduction. E refers to antibodies, hormones, and plasma.

2d.Circulation of tissue fluid, plasma, and lymph. The capillaries of the digestive tract absorb water from the digestive tract, so there are also.

I hope you can understand, and you can contact me again.

Hemoglobin is found in red blood cells and is not part of the internal environment.

The cycle diagram of the internal environment needs to be understood.

I haven't touched a creature for many years, I forgot it, reference.

Question 1: The human environment should refer to:

Blood, tissue fluid, lymphatic bar.

Blood: ADE definitely chose it. (The blood is salty, and sodium ions are definitely there.) AE is not to say) Then the blood is mainly to transport glucose and oxygen to the human body, so B should be chosen.

As for C, it should be a waste, don't choose it!

Question 2: C (Water is freely diffused, Ken comes from tissues adjacent to blood vessels, of course, it is impossible to expose blood vessels directly to the digestive tract).

The first question is BCDE

Question 2 D Because plasma and interstitial fluid penetrate each other to exchange water, lymph will then flow into plasma at the clavicle (but plasma cannot flow into plasma), and the person's small intestine absorbs water from food into plasma. (The key is to understand the book).

Hemoglobin is in blood cells and does not belong to the internal environment.

The digestive tract, such as the epidermal cells of the small intestine, absorb water and then enter the interstitial fluid and then enter the plasma, and the interstitial fluid and lymph need not be explained.

1.The two clauses are correctly separated, but they are combined and necessarily related.

4.Glucose oxidase promotes the use of glucose by cells for energy, and if the effect is impaired, glucose utilization decreases and blood sugar rises.

6.The main mode of fluid regulation is hormonal regulation, but a small number of non-hormone regulation, such as CO2, etc.

No, only these three, just to answer for you, not to adopt.

The buffer pairs of extracellular fluid are mainly composed of H2CO3, NAHCo3, Na2HPO4, NAH2PO4 and other buffer pairs.

The alkaline substances absorbed in food, or the acids produced by metabolism, are substances that destroy the pH stability of the human body, so how can they be said to constitute a buffer?

The idea that the alkaline substances in food are the buffer between the acids produced by metabolism is a bit of a reversal.

Breathing can only regulate the excretion of CO2, which in turn regulates the amount of H2CO3, but when regulating pH balance, the body also produces other buffer products, toxic substances are detoxified through the liver, and finally basically through the kidneys to expel waste products.

Therefore, "the regulation of the exercise intensity of the respiratory system by the nervous system is the reason why the pH of the human body does not change much" can only be said to be one of the aspects.

The human body usually does not change much between them, which is the result of the coordination of various physiological systems.

D: Answer Strictly speaking, the digestive system such as the gastrointestinal tract does not belong to the "body" at all (it does not enter the body and does not participate in metabolism). In the digestive system, food participates in digestion and does not enter the internal environment such as the circulation of body fluids at all, and only enters after digestion and absorption.

This question is actually to see if the answer in the option occurs in the body, and the option you asked b: antigen and antibody originally occurred in the body fluid circulation. So in fact, you don't need to understand the mechanism of antigen and antibody in this question.

Supplement: In biology, what we call "excretion" is called "excretion", and food does not enter the human body before it is digested and absorbed. For example, if a child accidentally swallows a glass ball, and the glass ball is excreted after a few days, then think about it, the glass ball only goes around the intestines and does not enter the blood and lymph.

Manual code words, ask for adoption.

The reaction that occurs in DD is within the digestive tract. The digestive tract is not part of the internal environment.

The first three of the answer d are all about the body's external protection of the body, while the fourth is significantly different from the first three.

Do you know what the concept of the internal environment is, don't you know it naturally if you figure out the concept first?

First of all, let's talk about what is homeostasis, the normal body regulates the activities of various organs and systems through regulation, and jointly maintains a relatively stable state of the internal environment, which is called homeostasis. There is a definition in the book: the state in which the physical and chemical properties (physical and chemical properties) of the internal environment remain relatively stable is called homeostasis.

It includes the temperature, pH, blood sugar content, water content, inorganic salt ion concentration, etc. If you look at the textbooks, the macro blood sugar regulation, water and salt regulation, and body temperature regulation are all necessary ways to regulate homeostasis. Homeostasis is of great significance for maintaining the form of cells and ensuring the normal function of cells, and is a necessary condition for the body to carry out normal life activities.

The ABC term is obviously in line with the meaning of homeostasis, and the abnormal ABC term will affect the normal life activities of the body. For example, if you sweat a lot and sweat less in the spring, the amount of urine excreted increases, and the specific gravity of urine decreases or increases, it will not affect the normal life activities of your cells and the body, so this cannot measure the homeostasis index. I hope it can help you, but you can ask if you still don't understand.

Because the human body is optimally 37, the enzymatic reaction is not as fast as this at other temperatures. When homeostasis is out of balance, it will inevitably be disordered due to endocrine, immune and other imbalances. The osmotic pressure will also drop when there is a disorder.

Diabetes mellitus is not necessarily caused by homeostasis, (except due to decreased tubular collection reabsorption, etc.) but mainly due to damage to pancreatic B cells. then select C

When the homeostasis of the internal environment is disrupted, it will affect the progress of cell life activities, that is, metabolic disorders.

The reaction rate of enzymes is temperature-dependent, b, osmotic pressure is related to the concentration of potassium and sodium ions inside and outside the cell, and d, diabetes is a problem with insulin secretion.