Where and when the plant body is able to respire

A photosynthesis of respiration.

The site is carried out only in the chloroplasts of the plant and is carried out during the life process of the plant.

Raw materials: carbon dioxide, water as raw materials, organic matter and oxygen as raw materials.

Conditions: It can only be done under light, with or without light.

Process Absorb carbon dioxide, release oxygen Absorb oxygen, release carbon dioxide.

Results Synthesis of organic matter, storage of energy Separation of organic matter, release of energy.

Secondly, it is necessary to find out the intrinsic connections between concepts.

Although photosynthesis and respiration are two different physiological activities, there is a close relationship between them. Photosynthesis depends on respiration, and respiration depends on photosynthesis. Respiration decomposes the organic matter that is produced by photosynthesis to store energy, and it is photosynthesis that converts sunlight into energy stored in organic matter.

Without respiration, photosynthesis cannot take place. The energy required for photosynthesis is released by the decomposition of organic matter by respiration.

A summary of the similarities and differences between the two is helpful for memory and understanding.

Respiration is also divided into aerobic respiration and anaerobic respiration.

Choose the first one, the plant also has to survive, and if you don't breathe, you will die!

So directly the first one, ok!

Although the plant body does not have a special respiratory organ, every living cell of the plant body is engaged in respiration, day and night.

aRespiration is the process by which cells break down their own organic matter to obtain energy. Living cells can only get energy through this process for their vital activities. So choose A.

aThere are parts of vital activity, day and night.

Most plants excrete carbon dioxide at night, and a few plants, such as those in the family Sedum, can also release oxygen at night.

Plants undergo photosynthesis and respiration during the day, photosynthesis consumes carbon dioxide to release oxygen, whereas plant respiration consumes oxygen and releases carbon dioxide. During the day, photosynthesis is usually greater than respiration, so plants release oxygen relatively during the day, while at night, most plants do not photosynthesize or the rate of photosynthesis is much smaller than respiration, and plants consume more oxygen and release carbon dioxide.

Respiration is the total process in which the organic matter in the organism undergoes a series of oxidative decomposition in the cell, and finally produces carbon dioxide or other products, and releases energy, which is called respiration. Respiration is a chemical process in which organisms oxidize and decompose organic matter in cells to produce energy, and all animals and plants have a life activity.

The respiration of the plant is the necessary survival of the plant, this process is divided into aerobic respiration, anaerobic respiration, and then under aerobic conditions, the glucose in the plant body should be decomposed by the oxygen counterlash, and release a large amount of energy, for the plant to live, in the lack of oxygen, the plant decomposes glucose into lactic acid or alcohol, but releases a small amount of energy, in short, the respiration is the process of the plant to obtain biological energy to decompose glucose for energy.

The main site of cellular respiration in plants is mitochondria. Mitochondria is a two-layer membrane-coated organelle present in most cells, a structure in cells that produces energy, and is the main site for cells to perform aerobic respiration. Its diameter is around microns.

With the exception of Entamoeba histolytica, Giardia basketii, and several microsporidia, most eukaryotic cells have mitochondria to a greater or lesser extent, but they each have mitochondria that vary in size, number, and appearance.

Mitochondria possess their own genetic material and genetic system, but their genome size is limited and is a semi-autonomous organelle. In addition to powering cells, mitochondria are involved in processes such as cell differentiation, cell messaging, and apoptosis, and possess the ability to regulate cell growth and cell cycle.

The chemical components of mitochondria mainly include water, proteins, and lipids, in addition to small amounts of small molecules such as coenzymes and nucleic acids. Protein makes up 65% to 70% of the dry weight of mitochondria. Proteins in mitochondria are both soluble and insoluble.

Soluble proteins are mainly enzymes located in the mitochondrial matrix and peripheral proteins of membranes; Insoluble proteins make up the body of the membrane, some of which are mosaic proteins, and some are enzymes. Lipids in mitochondria are mainly distributed in two membranes, accounting for 20% to 30% of the dry weight.

Respiration in plants: It is the process by which the plant body absorbs oxygen, converts organic matter into carbon dioxide and water, and releases energy. It provides energy for various life activities of plants.

Respiration in plants is respiration at the cellular level, through which cells obtain the necessary energy.

Plants are capable of respiration in all organs throughout the body.

Respiration is a common feature of living organisms, providing energy for the life activities of living organisms, so as long as living cells need energy, they must carry out respiration, so C is correct

Therefore, c

d. Mitochondria are found in all organs of plants, but respiration is strong and weak.

The function of respiration is to consume energy for life activities, so all cells of plants need to respire. The specific sites are the cytoplasmic matrix and the mitochondria, which are the main sites for aerobic respiration.

Option d should be selected for this question: in the various organs of the plant body.

Mitochondria are the energy converters in the cell, and the essence of respiration is the process by which the mitochondria in the cell break down organic matter and release energy.

According to the structural level of the plant, the six organs of the plant body (roots, stems, leaves, flowers, fruits, and seeds) are all composed of cells, so each organ contains mitochondria and can carry out respiration.

d in various organs of the plant body. will work.

The site where the plant undergoes respiration is all the plant cells.

Living cells use oxygen to break down organic matter into carbon dioxide and water, and release the energy stored in organic matter to supply the needs of life activities, a process called respiration.

Expression of respiration:

Organic matter (energy is stored) + oxygen Carbon dioxide + water + energy.

Place of respiration:

All living cells of living organisms consume energy in life activities, and the mitochondria in the cell are the main sites of respiration and are the energy converters in the cell.

Significance of respiration:

Respiration is the main way in which an organism obtains energy.

External factors influencing respiration:

Temperature, moisture, oxygen, and carbon dioxide concentrations are the main factors that affect respiration.

1) Temperature: Temperature has the greatest influence on the intensity of respiration. The temperature increases, the respiration is strengthened; If the temperature is too high, the respiration is weakened.

2) Moisture: The water content of plants increases, and respiration is strengthened.

3) Oxygen: Within a certain range, with the increase of oxygen concentration, the respiration effect is significantly enhanced.

4) Carbon dioxide: When the concentration of carbon dioxide greatly exceeds the normal value, it inhibits respiration. When storing vegetables, fruits, and grains, measures such as low temperature, drying, and carbon dioxide filling can extend the storage time.

Difference and connection between photosynthesis and respiration:

Distinction and connection between photosynthesis and respiration.

Distinguish the site of chloroplast-containing cells from all living cells.

Condition: Light With or without light.

Raw materials: carbon dioxide, water, organics, oxygen.

Products organic matter, oxygen carbon dioxide, water.

Energy, Matter Transformation Makes organic matter, stores energy Breaks down organic matter, releases energy.

Contact Without organic matter made by photosynthesis, respiration cannot proceed properly. This is because the organic matter decomposed by respiration is the product of photosynthesis, and the energy released by respiration is the energy stored by photosynthesis in the organic matter. Without respiration, photosynthesis cannot proceed properly.

This is because when plants are photosynthesizing, the energy required for the absorption of raw materials and the transportation of products is released by respiration. Respiration and photosynthesis are interdependent.

From the perspective of material transformation and energy transformation, photosynthesis is the process of material synthesis and energy storage, and respiration is the process of material decomposition and energy release, which are two opposite processes, but the two are not simple reversals.

The site of plant respiration is all living cells. Mitochondria are the main, but not all, sites of aerobic respiration. In addition to this, plants also have other respiration pathways, such as pentose phosphate pathway, photorespiration, etc.

Photorespiration needs to involve three organelles: mitochondria, chloroplasts, and peroxisomes.

First of all, the respiration of the plant is the necessary way for the plant to obtain life, this process is divided into aerobic respiration, anaerobic respiration, and then under aerobic conditions, the glucose in the plant body decomposes the glucose through the reaction with oxygen, and releases a large amount of energy to supply the plant life, in the lack of oxygen, the plant decomposes the glucose into lactic acid or alcohol, but releases a small amount of energy, which is the last resort of the plant, barely maintaining life, and releasing more or less energy, in short, Respiration is the process by which plants break down glucose for energy in order to obtain bioenergy.

Since the new curriculum standard junior 2 (8th grade) science book:

Respiration. Glucose, nourishing gas, water, carbon dioxide, energy.

Organic matter (glucose, C6H12O6) is oxidatively decomposed (absorbs oxygen) to produce water and CO2

The ability to release life activities for plants.

Conditions: All viable cells.

Influencing factor: temperature.

Sunlight and humidity.

The place where the plant is respiring for allergy is the stomata, which are distributed in the branches, roots and leaves of the plant, mainly on the leaves.

The main feature of its respiration is that chloroplasts photosynthesize during the day with respiration.

Absorbs carbon dioxide.

excretion of oxygen; At night, chloroplasts do not see light, cannot carry out photosynthesis, ordinary respiration, oxygen consumption and carbon dioxide are discharged.