Cells are the basic units of life activities of living organisms Examples

This is reflected in: 1. Cells are the basis of life metabolism. A lot of metabolism in living things is carried out on the cell-based unit. For example, growth and development based on cell proliferation and differentiation; Heredity and variation based on the transmission and variation of genes within cells, and so on.

2. Single-celled organisms.

It can rely on cells for various life activities.

3. Although viruses do not have a cell structure.

However, it is necessary to rely on the host cell for the continuation of life activities.

4. Multicellular organisms rely on the close cooperation of various differentiated cells to complete complex life activities.

Textbook Analysis: Reason: Life activities are inseparable from cells.

1) All organisms are made up of Sakura pizodias, and cells are the basic units of organisms (except viruses).

2) Cells are the basic unit of metabolism and function.

3) Cells are the basis for the growth and development of organisms.

4) The cell is the basic unit of heredity and has genetic totipotency.

5) Without chains, there are no cells, there is no backbone, there is a complete life.

The cell is the basic unit of life activity" is embodied in the () trace code.

a.All organisms are made up of cells, and cells are the basic units that make up organisms.

b.Cells are the basic unit of metabolism and function, and the basis for the growth and development of organisms.

c.The cell is the basic unit of multiplication and is the bridge of heredity.

d.Cells are the hallmarks of the origin of life and the starting point of biological evolution.

Correct Answer: All organisms are made up of cells, and cells are the basic units that make up organisms; Cells are the basic unit of metabolism and function, and the basis for the growth and development of organisms. The cell is the basic unit of reproduction, and it is the bridge of heredity; Cells are the hallmarks of the origin of life and the starting point of biological evolution.

Cells have an independent, orderly and self-controlled metabolic system, which is the basic unit of metabolism and function.

Cells are the basis for the growth and development of an organism.

The cell is the basic structural unit of heredity, the cell has the totipotency of heredity, there is no complete life without the cell (the virus must live in the living body), except for the virus, all other organisms are made of cells. But viral life activities must also be reflected in cells.

Most living organisms are composed of cells, which are the basic units of living organisms and the basic units of life activities, and the growth and development process of organisms is the growth and development process of cells. The aging and death of organisms are also caused by the aging and death of cells, which are the smallest constituent units of living organisms, the smallest functional units that complete life functions, and the basis for composing life.

Although viruses are non-cellular organisms, they must be inside the cell to exhibit basic life characteristics (reproduction and heredity). Therefore, in the case of viruses, the notion that the cell is the basic unit of life activity is also entirely appropriate.

Both plant cells and animal cells have cell membranes, cytoplasms, and nuclei, and plant cells also have cell walls, vacuoles, and chloroplasts, and both plant cells and animal cells are the basic units of structure and function of living organisms

So the answer is: structure and function

The complex human body is composed of a variety of different cells, which are the most basic units of human structure and function, and the activities of the human body are inseparable from cells. The decline of various functions of aging and even the emergence of various diseases in the human body is the decline of senescence function and disease of cells. There is only one disease that people have, and that is the disease of the cell.

1) The continuous continuation and reproduction of life depends on the growth and reproduction of cells. Higher animals combine sperm cells and egg cells to form fertilized eggs, which reproduce and develop into new offspring.

2) The growth and development of the body depends on the proliferation of cells. The weight of a human fertilized egg is about 10-6 grams, and at birth, the baby weighs about 3,000 grams and reaches 1,012 cells, and the adult weighs 20 times more and has 1,015 cells. Therefore, the growth of an organism depends mainly on the increase in the number of cells, rather than on the increase in cell size.

3) Replenish aging, damage and cell death in the course of vital activities. The average lifespan of red blood cells in human blood is 120 days, the villous epithelial cells of the small intestine are renewed every 2-3 days, the endometrium is periodically shed, the epithelial cells and hair on the body surface are rapidly replaced, the lifespan of liver cells is about 18 months, and the lifespan of nerve cells is very long, and some are almost the same as those of biological individuals.

The human body is constantly renewing, and the cells of the human body are completely renewed every 6-7 years. These normal physiological functions are based on the continuous proliferation of cells.

4) The repair of body wounds depends on cell proliferation. Accidental injury, surgery**, organ transplantation, wound repair, and the body's first aid process require the production of a large number of new cells in order to adapt to the needs of the body and restore the body's functions.

The body has a very precise self-regulation mechanism for cell proliferation, and if there is an abnormality in proliferation, the body will lose its balance and cause related diseases. For example, aplastic anemia, malignant tumors, etc., are of great significance in clinical medicine and practice.

Practice has proved that "glycopeptide" has a definite nutritional function for the rapidly growing tissue cells in the early stage of life, and high-quality nutrition feeds Youqiao Yantian cells and presents a healthy physique.