selectively permeable

some substances can cross through the membrane while other cannot,

form compartments within the cell. therefore different organelles can perform different task simultaneously

polar head region and two nonpolar tails.

is the tendency for molecules to spread out from a region of high concentration to low concentration.

where there are no high concentrations and low concentration regions.

is simple diffusion across the membrane.

requires energy to move across the membrane.

is the passive transport of water.

has less water and more solutes than a hyptonic one.

has more water and less solutes than hypertonic one

solutions have the same concentrations of water and solutes.

Red blood cells : A hypertonic solution outside the cell will cause

water to leave the cell. The cell will shrivel.

Red blood cells: A hypotonic solution outside the cell will cause

water to enter the cell. The cell may take up so much water that it may burst (lyse

red blood cells: An isotonic solution outside the cell will cause

no net movement of water. This is the ideal situation for an animal cell.

For plant cells: A hypertonic solution outside the cell will cause

water to leave the cell. The cell will shrivel and the plant will wilt and possibly die. plasmolysis

for plant cells: A hypotonic solution outside the cell will cause

water to enter the cell. However, a plant cell will not burst, because the cell wall will prevent excessive water uptake. The cell is turgid. This is the ideal situation for a plant cell.

for plant cells: An isotonic solution outside the cell will cause

the cell to be flaccid, and the plant will wilt.

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Chp. 5 bio

membrane structure and function

Question	Answer
selectively permeable	some substances can cross through the membrane while other cannot,
Membranes also	form compartments within the cell. therefore different organelles can perform different task simultaneously
cell membrane contains two layers of	phospholipids
phospholipids has a	polar head region and two nonpolar tails.
Diffusion	is the tendency for molecules to spread out from a region of high concentration to low concentration.
equalibrium	where there are no high concentrations and low concentration regions.
Diffusion does not require	energy
passive transport	is simple diffusion across the membrane.
active transport	requires energy to move across the membrane.
bulk transport	exocytosis and endocytosis
osmosis	is the passive transport of water.
anything dissolved in water is a	solute
water is the	solvent
Hypertonic solutions	has less water and more solutes than a hyptonic one.
Hypotonic solution	has more water and less solutes than hypertonic one
two isotonic	solutions have the same concentrations of water and solutes.
Red blood cells : A hypertonic solution outside the cell will cause	water to leave the cell. The cell will shrivel.
Red blood cells: A hypotonic solution outside the cell will cause	water to enter the cell. The cell may take up so much water that it may burst (lyse
red blood cells: An isotonic solution outside the cell will cause	no net movement of water. This is the ideal situation for an animal cell.
For plant cells: A hypertonic solution outside the cell will cause	water to leave the cell. The cell will shrivel and the plant will wilt and possibly die. plasmolysis
for plant cells: A hypotonic solution outside the cell will cause	water to enter the cell. However, a plant cell will not burst, because the cell wall will prevent excessive water uptake. The cell is turgid. This is the ideal situation for a plant cell.
for plant cells: An isotonic solution outside the cell will cause	the cell to be flaccid, and the plant will wilt.

Created by: 1574238891

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