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movement of fluids down a pressure or temperature gradient .
it is used by small lipid insoluble solutes that are present in water to cross cappillary wall.
CAPILLARY ACTION :
ability of a liquid to flow in narrow spaces without assistance or without oppostion of external forces.
it occurs because of intermolecular forces between liquid and surrounding solid surface ..
CAPILLARY ACTION HELPS THIS CONCEPT AS :
IN PLANTS :capillary acion is seen in plants .water is brought high in trees by branching ,evaporation creating depressurization ,osmotic pressure added to roots .
in plants cohesion -adhesion theory -water transport in xylem relies upon cohesion of water molecles to each other and adhesion(capillary action)to vessel wall by hydrogen bond combined to high water pressure to plant substratum and low pressure of extreme parts e.g leaves
IN ANIMALS:capillary action for water intake is described in animals such as ligia exotica .
in animals blood circulation is an e.g of capillary example
Mass movement of water along pressure gradients is known as bulk flow. Describe how capillary action...
3. Explain dendrochronology. How do these researchers evaluate historical climate? 4. Explain the bulk flow process in plants. In your answer, be sure to describe bulk flow driven by negative pressure and bulk flow driven by positive pressure. 5. Explain the mutualistic relationships that are important for proper plant nutrition using the relationship between bacteria and roots as an example. 6. How does acid rain influence cation absorption by plant roots?
Explain how capillary exchange of water could be affected in a person with chronic high blood pressure. How is the body compensating for these changes? What would happen if this ability to compensate was lost?
How does the osmotically generated pressure-flow mechanism account for the movement of sugars from source to sink?
how would is find the molar flow rate or mass flow rate of water when only pressure of inlet stream and outlet stream is given.
DESCRIPTION: The total pressure of a flow decreases along a streamline due to losses associated with non-ideal affects. These losses can be broken into major and minor total pressure losses. In this experiment, the major and minor total pressure losses through a pipe outfitted with a gate valve will be determined using pressure taps drilled into the pipe surface. The total pressure losses will be used to calculate the flow's friction factor and the valve's loss coefficient for a variety...
3. Explain how phloem loading occurs (both mechanisms), what results, and how this causes the movement of water and sucrose through the phloem 4. Describe long-distance transport in phloem through the Munch pressure-flow model 5. Describe the process of phloem unloading. 6. Predict "source" vs. "sink" relationships in plant parts, given a description of environmental influences and metabolic status.
not sure how the mass flow rate is 8.47 kg/s Water is pumped from an open reservoir to a large closed tank at a fixed pressure of 2 bar, through a vertical distance of 50 meters using a 5 kW pump. Determine the maximum flow rate of the water (in kg/s). State any assumptions you make. For this flow rate, determine the speed of the water inside a 10 cm diameter pipe. Determine also the pressure difference between the inlet...
1. Describe the relationship between pressure, volume, resistance and flow. How is this similar to blood flow through the heart and vessels? 2. What is intrapulmonary pressure? If it is higher than atmospheric pressure, what happens? What happens if it is lower than atmospheric pressure? Which gas law would you apply to explain this? State the law. 3. What is intrapleural pressure? Why is it important? 4. What would happen if intrapleural pressure became higher than intrapulmonary pressure? What might...
Water is the working fluid in an ideal regenerative Rankine cycle with one open feed water heater, Figure 2. Upstream of the high pressure turbine superheated vapour with a mass flow rate of 90 kg/s entres the first-stage turbine at a pressure of 14 MPa Each turbine stage has an isentropic efficiency of 90%. The temperature of the inlet vapour is 520°C. The steam expands through the first-stage turbine to a pressure of 0.9MPa where some of the steam is...
Describe how surge tower can help in reducing pressure in pipeline subjected to water hammer phenomena. A surge tower is required to be installed at the downstream end of a tunnel in a hydroelectric scheme to dampen the effect of waterhammer in the case of pump or electrical failures when the flow to the turbine is stopped suddenly. It has been anticipated that the diameter of the surge tower to be 10 m. Determine the height required for the surge...