transportation summary

Summary - In lower organisms, there is no transport system as the cells are in touch with the surrounding medium. The transport is by the physical processes like diffusion, osmosis, etc. With the advancement in structure, the organisms have to evolve methods to tr..

# Vascular system in plants relies mainly on physical processes whereas transport in animals utilises muscular energ..

>The proteins present in the membrane may function as carriers or receptors or enzymes. Transport across membranes involves several mechanisms. There are processes like diffusion and osmosis, which do not require energy or activity of the cell. Diffusion involves movement of molecules fro..

Cellular respiration is the step-wise oxidation of food molecules in a cell using oxygen, producing CO 2 and water and releasing energy, which is stored in ATP for later use. Cellular respiration may be aerobic or anaerobic. The initial steps constituting glycolysis are common to both. Glycolysis r..

Cell is the structural and functional unit of the organism. Water is the principal constituent of plants and is essential for the maintenance of life, growth and development. Plants absorb water from the soil through their roots, transport it to other parts of the plant through the xylem ..

>When longitudinal waves are propagating through a medium, the particles of the medium vibrate parallel to the direction of propagation of the wave. Another important aspect of the waves is that they do not go straight through openings or around barriers, but they spread out. So, when waves move th..

. The light reaction, in which light energy is captured by chlorophyll and converted to the chemical energy of ATP and NADPH. The dark reaction, in which carbon atoms are reduced and carbohydrates formed. In the currently accepted model of the light reactions in photosynthesis, light energy strikes..

Summary - The term biomembrane is used to describe the plasma membrane (cell membrane) and the membranes that surround the various cell organelles. The plasma membrane forms a protective covering around the cell to maintain its size and shape. In addition, it is also responsible for the i..

Summary - All vibrating and oscillating bodies are described by the length of time required for one complete cycle. Time period (T) is the reciprocal of frequency (f). Vibrations and oscillations are also characterised by terms like amplitude of vibrations which is actually the maximum di..

Summary - Cell is the structural and functional unit of the organism. Water is the principal constituent of plants and is essential for the maintenance of life, growth and development. Plants absorb water from the soil through their roots, transport it to other parts of the plan..