Osmosis And Others
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Diffusion equals
High concentration to low concentration
Osmosis equals
Pure water to solution
Osmosis definition
The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.
What is surface area to volume ratio
Surface area to volume ratio calculates the cube of the volume surface area and ratio.
What is a turgid?
Plant cells become “turgid” when they are put in dilute solutions.
What is the difference between osmosis diffusion and active transport
Diffusion is the movement of particles from a high to lower concentration. Osmosis is the diffusion of water across a membrane. Active transport moves particles from low to higher concentration.
how are substances transported into and out of cells by diffusion
molecules moving from an area of high concentration to an area of low concentration.
how are substances transported into and out of cells by osmosis
water molecules move across a concentration gradient
how are substances transported into and out of cells by active transport
combines with a membrane-bound carrier, which then releases the chemically unchanged substance inside the cell.
The effective ness of an exchange surface is increased by
Having a large surface area A membrane that is thin, to provide a short diffusion path (In animals) having a efficient blood supply
What are some of the substances transported in and out of cells?
Some of the substances transported in and out of cells by diffusion are oxygen and carbon dioxide in gas exchange, and of the waste product urea from cells into the blood plasma for excretion in the kidney.
factors that affect the rate of diffusion are:
• the difference in concentrations (concentration gradient) •the temperature • the surface area of the membrane
How does the small intestine and lungs in mammals, gills in fish, and the roots and leaves in plants, are adapted for exchanging materials.
is increased by: Having a large surface area. A membrane that is thin, to provide a short diffusion path. (in animals) Having an efficient blood supply.
How do you calculate rate of water uptake?
Water uptake (grams/hour) = Mass Change (grams) x60 divided by time measured (minutes)
What is the function of mitchondria
The mitochondria is the powerhouse of the cell
Function for chloroplast
produce energy through photosynthesis and oxygen