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Diffusion & Osmosis

KCKCC Bannister Spring 2011- chapter 3

What is the net movement of molecules or ions from regions of high concentration to low concentration? Diffusion
Diffusion is ________ transport? Passive
Energy for diffusion is _________ energy of the molecules or ions. Kinetic
Cellular metabolism(does or does not?) provide energy for diffusion? does not
Is ATP needed for diffusion? Yes
What is the main constituent of the plasma membrane structure? phospholipids
The membrane is often called a _______________ _______________. phospholipid bi-layer
Consistency of membrane is like________. olive oil
Substances that can diffuse through the phospholipid bi-layer are? oxygen, alcohol, nicotine, carbon dioxide, most drugs, oily substances
Substances that CANNOT diffuse through the phospholipid bi-layer are? water, protein molecules, sodium, chloride.
Substances that cannot diffuse through the phospholipid bi-layer must enter or leave a cell by means of protein ports or endocytosis or exocytosis
Integral proteins form ______ for passage of substances pores
Peripheral proteins are either on the _______(extracellular or _______ side) or on the ___________(intracellular) side of the membrane. Outside; interstitial; inside
External membrane proteins cell recognition proteins. ie. ABO blood type proteins
Internal membrane proteins cytoskeleton proteins. Provide Cell support.
Osmosis is the passage of_________ through a _______________ membrane. Water; semi-permeable.
Osmosis is the passage of water(with or against?) its concentration gradient. With
Osmosis is the passage of water(down or up?) its concentration gradient. down
Osmotic pressure is a measure of___________ concentration. solute
A solution with high osmotic pressure will absorb ( few or many?) molecules of water in osmosis. many
Molarity and molality are measurements of the number of _________ __________ in a solution. solute particles
Osmolality is a medical test for osmotic pressure in what body fluid? blood plasma
Tonicity the solute levels in a solution
Isotonic solution contains same number of solute molecules as normal body cells.
Hypertonic solution Contains more solute molecules than normal body cells.
Hypotonic solution Contains fewer solute molecules than normal body cells.
Saline solution that is used in medical situations is a(an) __________ solution. isotonic
Blood plasma is a(an) ___________ solution. isotonic
The water of the Dead Sea and Great Salt Lake is a(an) ___________ solution. Hypertonic
Tap water is a(an) ___________ solution. hypotonic
An extracellular solution that does not cause cells to change volume is __________. isotonic
An extracellular solution that causes cells to shrink is _________. hypertonic
An extracellular solution that causes cells to expand is___________. hypotonic
Most numerous solute particle in plasma sodium ions
Ions in body fluids are often called electrolytes
Osmolality test time it takes a plasma(serum) sample to freeze
Freezing time a measure of solute concentration.
Solute concentration in body fluids determines your body fluid volume and blood pressure
Electrolyte test most often ordered medical test
Four main electrolyte tests Sodium(Na+), Potassium(K+), Chloride(Cl-) and CO2(bicarbonate)
The cations sodium and potassium
The anions Chloride and bicarbonate(CO2)
Created by: daisywiz



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