biology 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| permeable | substances easily pass through the membrane
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| semipermeable | some substances are able to pass through the membrane
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| impermeable | nothing can get through the membrane
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| homeostasis | process by which organisms maintain a stable internal environment
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| cytolysis | causing of cells to burst
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| crenation | shrinking of cells
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| 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
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| dialysis | separation of particles in a liquid on the basis of differences in their ability to cross a membrane
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| brownian movement | movement caused by the bombardment of water molecules that causes the jiggling of stain particles
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| diffusion | particles moving from an area of higher concentration to an area of lower concentration
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| osmosis | diffusion of water through a selectively permeable membrane
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| hypertonic | lesser concentration of solute
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| hypotonic | higher concentration of solute
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| isotonic | concentration of two solutions is the same
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| ringer's solution | saline solution that usually contains sodium chloride, salts of potassium and calcium
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| 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
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| 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
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| materials that enter the cell through the phospholipid layer and effects | gasses, uncharged polar molecules- aided by passive diffusion, keep cells in balance
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| three examples of active transport | molecular transport, endocytosis, and exocytosis
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| what cell type has greater turgor pressure | plant cell
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| what cell structure allows this higher turgor pressure to build up | cell wall
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| 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
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| what is the source of usable energy by the cell during active transport | atp
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| what is the relationship between molecular weight of materials and the rate of diffusion | heavier they are the slower they diffuse
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| 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
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| three factors taht can influence the rate of diffusion | temperature, concentration difference, pressure
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| 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
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| 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
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| most common type of membrane in biological systems | semi permiable
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| what cell structure is responsible for regulating osmotic control of the cell contents | cell membrane
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| what substance would most likely pass through the membrane somewhere other than the pore | chloroform
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| are water and mRNA compounds permeable through the nuclear membrane | yes
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| what cell organelle is used to transport water out of an animal cell in an aquatic freshwater environment | contractile vacuole
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| do all particles pass into the cell through the cell's pores | no
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| do water molecules move in and out of cells placed in an isotonic solutions | yes
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| what is the inner and outer layer of the cell membrane made from | proteins and lipids
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| would turgor pressure be greater in animal cells than plant cells | plant cells
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| does the plasma membrane draw away from the cell wall in plants during plasmolysis | yes
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| salt water cell is left in the same concentration of salt water | stay the same
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| red blood cell is put into distilled water | swell
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| a fresh water animal cell is put into distilled water | swell
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| red blood cell is put into salt water | shrink
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| salt water animal cell is put in fresh water | swell
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| is osmosis an example of active transport | no
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| are contactile vacuoles very common in cells in a hypertonic solution | no
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| 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
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| is active transport a movement of particles against a concentration gradient | yes
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| would potassium permanganate, methylene blue, glucose, or iodine diffuse through water more rapidly | iodine
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| are cell pumps, permease, diffusion, and pinocytosis all forms of active transport | no
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| what salt solution is often used in physiological experiments | ringer's solution
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| where do chloroplasts move when a plant cell is placed in a salt solution | towards the center
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| equilibrium | when the concentration of the solute is the same throughout a system
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| what compound is used to test for the presence of salt | silver nitrate
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| what cell structure allows turgor pressure in plants to build up | cell walls
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| what cell structure aids many one celled organisms in aquatic environments eliminates excess water | contractile vacuole
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Created by:
kisland
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