B.1 Flashcards
What is diffusion?
Diffusion is the SPREADING out of PARTICLES from an area of HIGER CONCENTRATION to an area of LOWER CONCENTRATION.
What is osmosis?
Osmosis is a special type of diffusion. It the movement of water from a area of high connctrion to a area of low connctrion. This happens because there a semi parable membrane.
What is a isotonic?
If a solution is the same it is a isotonic.
What is a Hypertonic?
If outside the connctrion is higher it is hypertonic.
What is hypotonic?
If outside is lower than it is a hypotonic.
what is a concentrated solution?
A contrition solution is like squash it very strong.
what is a dilute solution?
A dilute solution is a one that has only a little solute dissolved in a certain amount of solvent.
what is crenation in animal cells? why does it happen?
While crenation occurs in animals cells, cells that have a cell wall cannot shrink and change shape when placed in a hypertonic solution.
what is lysis in animal cells? why does it happen?
Osmotic lysis is the bursting of a cell, aka a “cell explosion” or “cytolysis”, because of an overabundance of fluid. The cell’s membrane is not large enough to accommodate the excess fluid, causing the membrane to break open, or lyse.
what happens when water enters a plant cell? why?
When the take up water by osmosis they start to swell, but the cell wall prevents them from bursting.
what happens when water leaves a plant cell ? why?
Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem
what is active transport?
the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
Foumula for magnification?
Magnification=image size
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Real size
A specimen is 50um wide. Calculate the width of the image under a x100?
100x50=5000um
Sperm cell
A sperm cell is designed so that it can get to the female DNA it got a strem lined head and a tail to swim faster
