The video tutorial explains osmosis as a type of passive transport involving water diffusion. It covers the movement of water across semi-permeable membranes, emphasizing that osmosis only involves water, not solutes like glucose. The tutorial uses beaker examples to illustrate how water moves toward solutes. It also explains isotonic, hypotonic, and hypertonic solutions, detailing their effects on animal and plant cells. The optimal environments for red blood cells and plant cells are discussed, highlighting the importance of solution concentration in maintaining cell health.

What is the simplest definition of osmosis?

• Movement of amino acids

• Movement of water molecules

• Movement of salt molecules

• Movement of glucose molecules

In osmosis, molecules move from an area of ______ concentration to an area of ______ concentration.

• none, some

• high, low

• low, high

• equal, equal

What type of membrane allows some molecules to pass through based on size?

• Non-permeable membrane

• Permeable membrane

• Semi-permeable membrane

• Impermeable membrane

In the beaker experiment, why can't glucose pass through the membrane?

• It is not present

• It is not soluble

• It is too large

• It is too small

What does the prefix 'iso-' mean in the context of solutions?

• None of the above

• Below or less than

• Equal or same

• Above or more than

What is the tonicity of a solution with 0.9% salt compared to a red blood cell with 0.9% salt?

• Hypotonic

• Hypertonic

• None of the above

• Isotonic

What happens to a red blood cell in a hypotonic solution?

• It shrivels

• It becomes rigid

• It remains the same

• It swells and may burst

Why do cells in your mouth dehydrate after eating salty foods?

• Because the salt moves into the cells

• Because the water moves out of the cells

• Because the cells absorb more water

• Because the cells become isotonic

What is the optimal environment for plant cells?

• Isotonic solution

• None of the above

• Hypotonic solution

• Hypertonic solution

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What happens to a plant cell in a hypertonic solution?

• It swells

• It becomes turgid

• It remains the same

• It wilts and may die