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Fun Video: Osmosis and Osmotic Pressure Video Lecture - NEET
FAQs on Fun Video: Osmosis and Osmotic Pressure Video Lecture - NEET
| 1. What is osmosis and how does it relate to osmotic pressure? |  |
Ans. Osmosis is the movement of solvent molecules (usually water) across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. Osmotic pressure, on the other hand, is the pressure required to prevent the net flow of solvent through a semipermeable membrane. Osmotic pressure is directly related to the concentration of solute particles and is a measure of the tendency of a solution to draw water into it through osmosis.
| 2. What factors affect osmotic pressure? | |
Ans. Several factors affect osmotic pressure, including the concentration of solute particles, temperature, and the nature of the solute and solvent. An increase in solute concentration or temperature generally results in an increase in osmotic pressure. Additionally, the size and charge of the solute particles can also influence osmotic pressure.
| 3. How is osmotic pressure measured? | |
Ans. Osmotic pressure can be measured using various techniques, such as the freezing point depression method or the vapor pressure lowering method. In the freezing point depression method, the decrease in the freezing point of a solvent due to the presence of solute particles is measured, and the osmotic pressure can be calculated using the relationship between freezing point depression and osmotic pressure. In the vapor pressure lowering method, the decrease in vapor pressure of the solvent in the presence of solute particles is measured, and osmotic pressure is calculated using the relationship between vapor pressure lowering and osmotic pressure.
| 4. What are some biological examples of osmosis and osmotic pressure? | |
Ans. Osmosis and osmotic pressure play crucial roles in biological systems. One example is the movement of water in and out of cells through the cell membrane, where osmosis helps maintain cellular hydration and balance. Osmotic pressure is also essential for the absorption of nutrients in the small intestine, as water moves into the intestine to dilute the solute concentration and facilitate absorption. Furthermore, osmosis is involved in the regulation of water balance in plants, where water moves from the soil into roots and eventually reaches the leaves.
| 5. How does osmotic pressure affect living organisms? | |
Ans. Osmotic pressure is critical for the survival and functioning of living organisms. It helps maintain the proper balance of water and solutes within cells, ensuring their proper hydration and preventing excessive swelling or shrinking. Osmotic pressure also influences the movement of fluids within organisms, such as the transportation of nutrients in the bloodstream. Imbalances in osmotic pressure can lead to various health issues, such as dehydration or edema.
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