animation of osmosis diffusion turgor pressure

It is a process involving net diffusion of water molecules from a region of higher water concentration to a region of lower water concentration through a semipermeable membrane. The osmotic movement of water from a surrounding medium into a cell is called endosmosis. Such a medium is desc..

Roots absorb water from the soil by osmosis or diffusion as the water is in higher concentration in the soil than in the roots. The absorption may take place into the intercellular spaces of the root cells or the root hairs. Root hairs are epidermal outgrowths. Once the water..

Passive absorption is by osmosis. Passive absorption takes place along the concentration gradient - when the concentration of cell sap is higher than that of soil water. Water is absorbed when transpiration rate is high or soil is dry. Due to high transpiration rate, water deficit is crea..

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 plant through the xylem ..

Exchange of Respiratory Gases The exchange of respiratory gases is through membranes. In lungs, the gases are exchanged between the lungs and the blood capillaries and in the tissues, the gases are exchanged between the cells and the blood surrounding them. The gases move across the membranes b..

The glomerular filtrate flows in opposite directions in the two limbs of Henle's loop...

Introduction - In unicellular organisms a single cell carries out all the life processes as the cell itself is the organism. In advanced forms like the few-celled algae, protozoa, sponges, etc., the size of the organism ensures that all the cells are not very far from each other. The uptake of mate..

>When the transpiration pull is exerted, a negative pressure or tension is generated in the xylem. About 98% water absorbed by land plants evaporates from aerial plants parts and diffuses into atmosphere. The opening and closing of stomata is controlled by the size and shape of ..

The entry of water into the root hair dilutes the cell sap. Thus water molecules in root hair increases as compared to adjacent cortical cells. At this stage diffusion pressure deficit (DPD) of root hairs is lower than that of adjacent cortex. Due to higher DPD in cortex, water ..

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 transport nutrients an..