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biology 3

permeable substances easily pass through the membrane
semipermeable some substances are able to pass through the membrane
impermeable nothing can get through the membrane
homeostasis process by which organisms maintain a stable internal environment
cytolysis causing of cells to burst
crenation shrinking of cells
plasmolysis shrinking of protoplasm from the cell wall of a plant due to water loss from osmosis, resulting in gaps between the cell wall and the cell memebrane
dialysis separation of particles in a liquid on the basis of differences in their ability to cross a membrane
brownian movement movement caused by the bombardment of water molecules that causes the jiggling of stain particles
diffusion particles moving from an area of higher concentration to an area of lower concentration
osmosis diffusion of water through a selectively permeable membrane
hypertonic lesser concentration of solute
hypotonic higher concentration of solute
isotonic concentration of two solutions is the same
ringer's solution saline solution that usually contains sodium chloride, salts of potassium and calcium
concentration gradient particles moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles
structure of a membrane and why they work to control movement of materials in and out of cells thin, flexible barrier surrounding cells- provide protection and support
materials that enter the cell through the phospholipid layer and effects gasses, uncharged polar molecules- aided by passive diffusion, keep cells in balance
three examples of active transport molecular transport, endocytosis, and exocytosis
what cell type has greater turgor pressure plant cell
what cell structure allows this higher turgor pressure to build up cell wall
what do contractile vacuoles do for aquatic animals and why is it important get rid of excess water- so they don't get too full and explode
what is the source of usable energy by the cell during active transport atp
what is the relationship between molecular weight of materials and the rate of diffusion heavier they are the slower they diffuse
three major factors that help determine whether materials are permeable to membranes or not size, condition inside and outside the membrane, concentrations of solutes and water, size of the membrane
three factors taht can influence the rate of diffusion temperature, concentration difference, pressure
solution has a dissolved particle concentration of 10% and a red blood cell is placed in the solution, what will happen to the cell and why it will shrink- the sodium is causing the water to leave the cell
osmometer is set up, the solution in the dialysis bag contains a 10% starch solution, the solution surrounding the bag contains a 20% starch solution, if starch is not permeable to the membrane, which direction will osmosis occur and why solution will go out of the bag because it is more concentrated
most common type of membrane in biological systems semi permiable
what cell structure is responsible for regulating osmotic control of the cell contents cell membrane
what substance would most likely pass through the membrane somewhere other than the pore chloroform
are water and mRNA compounds permeable through the nuclear membrane yes
what cell organelle is used to transport water out of an animal cell in an aquatic freshwater environment contractile vacuole
do all particles pass into the cell through the cell's pores no
do water molecules move in and out of cells placed in an isotonic solutions yes
what is the inner and outer layer of the cell membrane made from proteins and lipids
would turgor pressure be greater in animal cells than plant cells plant cells
does the plasma membrane draw away from the cell wall in plants during plasmolysis yes
salt water cell is left in the same concentration of salt water stay the same
red blood cell is put into distilled water swell
a fresh water animal cell is put into distilled water swell
red blood cell is put into salt water shrink
salt water animal cell is put in fresh water swell
is osmosis an example of active transport no
are contactile vacuoles very common in cells in a hypertonic solution no
would cells that have been placed in a solution with a 100% water concentration return back to their original condition if placed in a hypotonic solution no
is active transport a movement of particles against a concentration gradient yes
would potassium permanganate, methylene blue, glucose, or iodine diffuse through water more rapidly iodine
are cell pumps, permease, diffusion, and pinocytosis all forms of active transport no
what salt solution is often used in physiological experiments ringer's solution
where do chloroplasts move when a plant cell is placed in a salt solution towards the center
equilibrium when the concentration of the solute is the same throughout a system
what compound is used to test for the presence of salt silver nitrate
what cell structure allows turgor pressure in plants to build up cell walls
what cell structure aids many one celled organisms in aquatic environments eliminates excess water contractile vacuole
Created by: kisland
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