Cell Division 2 Flashcards
What is the concentration gradient?
A measurement of how a concentration of a substance changes from one place to another
What is an alveoli?
A tiny air sac found in the lungs through which gases exchange between blood and air
What is blood plasma?
A liquid that carries our blood cells and dissolved molecules
What are the villi?
Tiny finger like projections that increase the surface area of the small intestine
What is urea?
A waste product of protein metabolism in mammals that is excreted in urine
What is osmosis?
The net diffusion of water from an area of high concentration to an area of lower water concentration across a partially permeable membrane
What does partially permeable mean?
Allowing only substances of a certain size through
What’s a hypERtonic?
A solution with a HIGHER concentration of solutes
What’s a hyPOtonic?
A solution with a LOWER concentration of solutes
What is active transport?
The net movement of particles from an area of higher concentration using energy
