The Science of Osmosis: Water Movement and Its Impact on Living Organisms

The video explains osmosis, a type of diffusion involving water movement through a semi-permeable membrane. It covers how water moves from areas of high to low concentration and the effects of solute concentration. Real-life examples, such as IV fluids and fish in different water types, illustrate osmosis. The video also discusses hypertonic and hypotonic solutions, osmosis in plants, and the impact of salt on slugs. Advanced concepts like water potential are briefly mentioned.

What is osmosis primarily concerned with?

• Movement of water

• Movement of solutes

• Movement of energy

• Movement of gases

In osmosis, water moves from an area of _____ concentration to an area of _____ concentration.

• low, high

• none, none

• high, low

• equal, equal

What term describes a solution with a higher solute concentration compared to another?

• Equitonic

• Hypertonic

• Isotonic

• Hypotonic

Why would giving someone an IV of pure water be dangerous?

• It would cause dehydration

• It would have no effect

• It would cause cells to shrink

• It would cause cells to swell and burst

What happens to a saltwater fish placed in freshwater?

• Its cells shrink

• It becomes dehydrated

• Its cells swell

• It remains unaffected

How do root hair cells absorb water from the soil?

• By diffusion of solutes

• By capillary action

• By active transport

• By osmosis, as they are hypertonic to the soil

What effect does salting roads have on nearby plants?

• It has no effect

• It dehydrates them by making the soil hypertonic

• It helps them grow

• It makes the soil isotonic

Why is placing salt on slugs harmful?

• It attracts predators

• It causes them to dehydrate

• It makes them grow faster

• It has no effect

What is the main reason water moves in osmosis?

• To reach equilibrium

• To decrease solute concentration

• To increase pressure

• To increase solute concentration

What advanced concept in osmosis involves calculating water potential?

• Energy potential

• Solute potential

• Water potential

• Pressure potential