Osmosis and Diffusion Quiz: Biology Concepts

Study Notes

Specialized Cells and Transport

Root hair cells are specialized to absorb water from the soil.

Diffusion and Osmosis

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration until they are evenly distributed.
Osmosis is the movement of water molecules from an area of higher concentration to an area of lower concentration through a semi-permeable membrane.

Cellular Transport

Glucose moves from the intestine into the bloodstream through facilitated diffusion.
Oxygen moves from the lungs into the blood through diffusion.
Carbon dioxide moves from the blood into the lungs through diffusion.
Active transport requires energy from respiration and is used to move molecules against their concentration gradient.

Investigating Osmosis

Potential hazards when investigating osmosis using potatoes include contamination, inaccurate measurements, and inconsistent conditions.
The change in mass measured during an osmosis investigation is a dependent variable.

Cell Membranes

A semi-permeable membrane allows certain molecules to pass through while restricting others.
Increasing the effectiveness of an exchange surface can be achieved by increasing the surface area, increasing the difference in concentration, and decreasing the thickness of the exchange surface.

Description

Test your knowledge on diffusion, osmosis, and the movement of substances across cell membranes in biology. Questions cover topics like the pathways of oxygen and glucose into the bloodstream, potential hazards in investigating osmosis with potatoes, and specialized cells for absorbing water from soil.