Understanding Osmosis

The video explains osmosis, a type of diffusion involving water movement through a semi-permeable membrane. It covers the concepts of hypertonic and hypotonic solutions, illustrating with examples like IV fluids, fish in different water types, and plant water absorption. The video also touches on advanced topics like water potential, emphasizing the importance of understanding water movement in biological systems.

Why is it dangerous to give someone an IV of pure water?

• It causes blood to thicken.

• It can lead to cell swelling and bursting.

• It causes dehydration.

• It increases blood pressure.

What is osmosis primarily concerned with?

• Movement of solutes through a membrane.

• Movement of water through a semi-permeable membrane.

• Movement of gases through a membrane.

• Movement of nutrients through a membrane.

In osmosis, water moves towards which type of concentration?

• Lower solute concentration

• Higher solute concentration

• Higher water concentration

• Equal solute concentration

What does the term 'hypertonic' refer to?

• A solution with equal solute concentration

• A solution with higher solute concentration

• A solution with no solutes

• A solution with lower solute concentration

What happens to a saltwater fish placed in freshwater?

• Its cells shrink due to water loss.

• It remains unaffected.

• Its cells swell due to water influx.

• It becomes dehydrated.

Why do plants near salted roadsides often die?

• They are exposed to too much sunlight.

• The salt acts as a fertilizer.

• The soil becomes too hypertonic, preventing water absorption.

• They receive too much water.

What adaptation allows some fish to switch between fresh and saltwater?

• They can alter their solute concentration.

• They can change their skin color.

• They can breathe both air and water.

• They can change their body temperature.

How do root hair cells absorb water from the soil?

• By active transport

• By being hypotonic to the soil

• By being hypertonic to the soil

• By being isotonic to the soil

What is the role of water potential in osmosis?

• It measures the solute concentration.

• It determines the speed of water movement.

• It calculates the energy required for osmosis.

• It indicates the direction of water movement.

What happens to a slug when salt is poured on it?

• It absorbs more water.

• It becomes hypertonic.

• It swells up.

• It dehydrates due to water loss.