importance of Osmosis and Diffusion. osmoregulation

HOW OSMOSIS AND DIFFUSION HELP IN TRANSPORT SYSTEM

Diffusion is important to flowering plants in the following ways:
1. Movement of carbon dioxide through the stomata of the leaves during respiration.

2. There is movement of carbon dioxide through the stomata into the leaves during photosynthesis.

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WEED AND THEIR BOTANICAL NAMES
1. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
2. DISEASES
3. 52. SOIL MICRO-ORGANISMS
4. ORGANIC MANURING
5. FARM YARD MANURE
6. HUMUS
7. COMPOST
8. CROP ROTATION
9. GRAZING AND OVER GRAZING
10. IRRIGATION AND DRAINAGE
11. IRRIGATION SYSTEMS
12. ORGANIC MANURING
13. FARM YARD MANURE
14. HUMUS
15. COMPOST
16. CROP ROTATION

  1. IRRIGATION AND DRAINAGE
  2. IRRIGATION SYSTEMS
  3. INCUBATORS
  4. MILKING MACHINE
  5. SIMPLE FARM TOOLS
  6. AGRICULTURAL MECHANIZATION
  7. THE CONCEPT OF MECHANIZATION
  8. PROBLEMS OF MECHANIZATION
  9. SURVEYING AND PLANNING OF FARMSTEAD
  10. IMPORTANCE OF FARM SURVEY
  11. SURVEY EQUIPMENT
  12. PRINCIPLES OF FARM OUTLAY
  13. SUMMARY OF FARM SURVEYING
  14. CROP HUSBANDRY PRACTICES
  15. PESTS AND DISEASE OF MAIZE- ZEA MAYS
  16. CULTIVATION OF MAIZE CROP
  17. OIL PALM
  18. USES OF PALM OIL
  19. MAINTENANCE OF PALM PLANTATION
  20. COCOA
  21. PROCESSES IN COCOA CULTIVATION
    HOLING AND LINING
  22. YAM
  23. LAND PREPARATION FOR YAM
  24. DEPT OF PLANTING
  25. SPACING OF YAM
In order to conduct the day-to-day activities of daily life, all cells must transfer essential ions and small molecules across semi-permeable plasma membranes. Ions are atoms or molecules with a net positive or negative charge.
importance of osmosis and Diffusion
OSMOSIS AND DIFFUSION
To fulfill the requirements of life, cells exchange gases, such as oxygen and carbon dioxide; excrete waste products; and take in particles of food, and minerals. The exchange takes place between the inner cell and its surrounding extra-cellular fluid.

At the end of this article, students should be able to:
1. its-properties.html”>cytoplasm, cell sap, lymph and blood
6. Describe the mechanisms of transportation in various animals
7. Compare and contrast various mechanisms of transportation
8. Demonstrate and Define diffusion
2. Explain the inadequacy of diffusion alone as a transport system for complex organisms
3. Explain the necessity of a transport system in complex organisms
4. Identify source of materials and where they are transported to
5. Discuss the different types of transportation media such as the flow of materials in plant

MEANING OF TRANSPORT SYSTEM

Transport system in plants and animals refers to the movement of metabolic materials from various parts of the organisms where they are produced or obtained to the parts where they are either used, stored or removed from the body.

HOW DIFFUSION DIFFUSION HELP IN TRANSPORT SYSTEM

Diffusion is the process by which molecules or ions of a (i.e. gases and liquids) move from a region of high concentration to a region of low concentration until they are evenly distributed. The involved in diffusion may be liquid, gases or solid.

OSMOSIS AND DIFFUSION HELP
OSMOSIS and DIFFUSION

factors affecting or controlling diffusion

The rate or speed of diffusion is controlled by a number of factors which are:
1. State of matter: diffusion varies with the three states of matter. The diffusion of gases is more faster than that of liquids because the gas molecules are freer and therefore faster than liquid molecules.
Molecular size: the nature or the size of the molecules affect diffusion. In general, the smaller the molecules, the faster the rate of diffusion while the larger the molecules the slower the rate of diffusion.
2. Differences in concentration: for diffusion to take place in a medium, there must be differences in the concentration of the in two areas.

The greater the differences in the concentration of the molecules, the greater the rate of diffusion.
3. Temperature: high temperature increases the speed at which molecles move. Thus, the higher the temperature, the faster the rate of diffusion.

Experiment to demonstrate diffusion in liquids

Take a beaker and fill it with distilled . Use pipette to deliver small quantity of potassium permanganate solution gently at the bottom of the beaker and leave it to stand for few minutes. The purple colour of the potassium permanganate solution starts to spread outside.

Eventually, the colour spreads evenly throughout the medium so that the water have the same shade of purple colour.

Experiment to demonstrate diffusion in gases

Take a bottle of ammonia solution, open the bottle and move some distance away from the bottle and wait for some time. The small the air to perceive the odour. The smell of the ammonia gas shows that diffusion of ammonia has taken place.

importance of diffusion to flowering plants

Diffusion is important to flowering plants in the following ways:
1. Movement of carbon dioxide through the stomata of the leaves during respiration.
2. There is movement of carbon dioxide through the stomata into the leaves during photosynthesis.
3. Water vapour leaving the leaves during respiration.
4. Movement of oxygen into the leaves through the stomata during respiration.

Importance of diffusion to animals

Diffusion plays important roles in the life of animals through the following processes
1. There is intake of oxygen or nutrients from mother to foetus (embryo) through placenta.
2. Gaseous exchange in mammals occurs in the lungs during respiration.
3. Gaseous exchange in many cells and organisms e.g. Amoeba takes in oxygen and gets rid of carbon dioxide by diffusion.

4. There is movement of carbon dioxide from the lung capillaries into the air sac.

diffusion in nature or non-living conditions

Diffusion is also very important in nature or non-living conditions through the following processes:
1. The smell or odour of perfume from a person or a corner of a room.
2. Diffusion of molecules (gases and liquids) in iodine, potassium permanganate and copper sulphate solutions.
3. The spread of insecticide in a room.
4. The spread of smell of gases released from the anus.

WHAT IS release AND HOW IT HELPS IN TRANSPORT SYSTEM

Osmosis is the flow of water or solvent molecules from a region of dilute or a weaker solutions to a region of concentrated or stronger solution through a selectively or differentially permeable membrane. It should be noted that osmosis is a special form of diffusion.

Conditions necessary for osmosis to take place

There are three major conditions which are necessary for osmosis to take place. These are:
1. Presence of a stronger solution e.g. sugar or salt solution.
2. Presence of a weaker solution e.g. distilled water.
3. Presence of a selectively or differentially permeable membrane.

Living cells as osmometre

In osmosis, there are usually two solutions which are separated by a differentially permeable membrane. The weaker solution is said to be hypotonic while the stronger solution is said to be hypertonic. When both solutions have the same concentration, they are said to be isotonic.
1. Hypotonic; when a cell of a living plant or animals is surrounded by pure water or solution whose solute concentration is lower, water passes into the cells by osmosis. The solution is therefore said to be hypotonic.
2. Isotonic: when the solute concentration of the cell and its surrounding medium are the same, the solution is said to be isotonic.
Hypertonic: when the cell is surrounded by a stronger solution, water will be lost by the cell. The shrinking of the cell is as a result of the surrounding solution being hypertonic. In living cells when water moves across the membrane into a solution of higher concentration, a pressure is created in the cell, this pressure is called osmotic pressure.

3. The solution is said to exert a higher osmotic pressure than the weaker solution. Osmotic pressure is a force that draws in water into the cell. The pressure which a solution can potentially exert is called its osmotic potential.

osmoregulation

is the control of fluctuations in the concentration of substances in cell fluids by special devices such as the contractile vacuole in amoeba.

NEED FOR TRANSPORTATION

The need for transportation in living organisms include:
1. Transport is necessary for every cell of the organism to obtain all the essential materials for its metabolism, e.g. nutrients, oxygen and water.
2. It is also necessary to remove and dispose metabolic wastes, e.g. carbon dioxide, water and urea.
3. In plants, transport is necessary to move mineral salt and water from the roots to the stems and leaves.
4. Transport is also required to move hormones in plants and animals from where they are produced to the area of need.
5. Glucose from the leaves and storage organs are some of the substances being regularly transported in plants.
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WEED AND THEIR BOTANICAL NAMES
1. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
2. DISEASES
3. 52. SOIL MICRO-ORGANISMS
4. ORGANIC MANURING
5. FARM YARD MANURE
6. HUMUS
7. COMPOST
8. CROP ROTATION
9. GRAZING AND OVER GRAZING
10. IRRIGATION AND DRAINAGE
11. IRRIGATION SYSTEMS
12. ORGANIC MANURING
13. FARM YARD MANURE
14. HUMUS
15. COMPOST
16. CROP ROTATION

18. IRRIGATION AND DRAINAGE
19. IRRIGATION SYSTEMS
20. INCUBATORS
21. MILKING MACHINE
22. SIMPLE FARM TOOLS
23. AGRICULTURAL MECHANIZATION
24. THE CONCEPT OF MECHANIZATION
25. PROBLEMS OF MECHANIZATION
26. SURVEYING AND PLANNING OF FARMSTEAD
27. IMPORTANCE OF FARM SURVEY
28. SURVEY EQUIPMENT
29. PRINCIPLES OF FARM OUTLAY
30. SUMMARY OF FARM SURVEYING
31. CROP HUSBANDRY PRACTICES
32. PESTS AND DISEASE OF MAIZE- ZEA MAYS
33. CULTIVATION OF MAIZE CROP
34. OIL PALM
35. USES OF PALM OIL
36. MAINTENANCE OF PALM PLANTATION
37. COCOA
38.
39. PROCESSES IN COCOA CULTIVATION
HOLING AND LINING
40. YAM
41. LAND PREPARATION FOR YAM
42. DEPT OF PLANTING
43. SPACING OF YAM

89. PLANT NUTRIENTS
90.
MACRO NUTRIENTS IN GENERAL
112. THE MAINTENANCE OF SOIL FERTILITY
113. CROP ROTATION
114. APPLICATION OF ORGANIC MANURES
115. FARM YARD MANURE
116. APPLICATION OF INORGANIC MANURE

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