Homework Answers
a. Water
Our body fluids contain salts dissolved and or suspended in water. These fluids are present both in intracellular and extracellular fluids, separated by a semi permeable membrane. According to the concentration of the solute, the water move across the membrane (osmosis), this ability of osmosis to draw water to build up certain pressure is called osmotic pressure. So, water always moves to maintain uniform pressure in and outside of the cell, hence all the intracellular and extracellular fluids are isotonic.
The fluids having lower osmotic pressure than the body fluids are known as hypotonic solutions. If cells are placed in hypotonic solution, they draw water from the solution and swell.
The fluids having more osmotic pressure than the body fluids are known as hypertonic solutions. The cells placed in hypertonic solutions shrink as they lose water into the surrounding hypertonic solution. This is known as crenation.
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Osmosis refers to the diffusion of water small molecules solute molecules. gaseous particles.
Compare and Contrast Diffusion and Osmosis Diffusion Osmosis Is a gradient needed? Direction of movement in...
Compare and Contrast Diffusion and Osmosis Diffusion Osmosis Is a gradient needed? Direction of movement in relation to the solute) Is a membrane required? Source of energy for movement What is moved
Which of the following is false regarding osmosis and diffusion? a) A single glycogen molecule will...
Which of the following is false regarding osmosis and diffusion? a) A single glycogen molecule will cause a higher rate of osmosis into an animal cell than the equivalent mass of free glucose molecules. b) Some cells that are specialized to take up water rapidly need a special protein to accomplish this c) Plant cells will perform best in a slightly hypotonic solution while most animal cells perform best in an isotonic solution d) After net diffusion, once solute concentration...
QUESTIONS 1. What is the difference between diffusion and osmosis? om one Slace to an to...
QUESTIONS 1. What is the difference between diffusion and osmosis? om one Slace to an to we movement OP water aaross ca membiane is the solute and the 2. In a salt water solution, the is the solvent. Part A: The Effect of Concentration on Rate of Diffusion 3. Based on your results, how does the concentration of a solute affect its rate of diffusion? Part B: The Effect of Molecular Weight on Rate of Diffusion 4. Based on your...
The majority of water molecules moving across plasma membranes by osmosis do so via a process...
The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to _______ facilitated diffusion cotransport simple diffusion active transport a process that requires energy from the cell
Osmosis moves water from a region of 1.high solute concentration to a region of low solute...
Osmosis moves water from a region of 1.high solute concentration to a region of low solute concentration. 2.low solute concentration of to a region of high solute concentration. 3.hypertonic solution to a region of hypotonic solution. 4.negative osmotic potential to a region of positive osmotic potential. 5.low concentration of water to a region of high concentration of water.
Bio 109-Osmosis and Diffusion b. What does it mean when the cell membrane is described as...
Bio 109-Osmosis and Diffusion b. What does it mean when the cell membrane is described as being selectively permeable? c. Distinguish between osmosis and diffusion. 5. Define the following terms: a. solute A Gubstance tnat is dissolvedina soluhon b. solvent The dissoluing ao a solu hoyn c. solution eneous mixture hun on d. organic molecule Revised 06/2011
6 microscopes slides and coverslips Vinegar Compound microscope PRE-LAB QUESTIONS 1. Define diffusion. Define osmosis. 2....
6 microscopes slides and coverslips Vinegar Compound microscope PRE-LAB QUESTIONS 1. Define diffusion. Define osmosis. 2. diffusion being Which factors that influence the rate in 3. n. INTRODUCTION Living organisms are roughly 75-85% water. This makes water the universal solvent for biological solutions. Sugars, proteins, electrolytes, and organic molecules such as hormones are examples u In fa st all.cubctancer entering or leaving cells of difforont hielegieal ce.. dieeiad in
Dittusion of Molecules In this exercise you will investigate characteristics of molecules that facilitate diffusion, factors...
Dittusion of Molecules In this exercise you will investigate characteristics of molecules that facilitate diffusion, factors that influence diffusion rates, and diffusion of solutes through a selectively permeable membrane. Experiment A. Kinetic Energy of Molecules Materials dropper bottle of water slide and coverslip carmine powder (KM,04 compound microscope dissecting needle assim perman Introduction Molecules of a liquid or gas are constantly in motion because of the intrinsic kinetic energy in all atoms and molecules. In 1827, Robert Brown, a Scottish...
How does facilitated diffusion differ from simple diffusion? Facilitated diffusion requires ATP Facilitated diffusion requires a...
How does facilitated diffusion differ from simple diffusion? Facilitated diffusion requires ATP Facilitated diffusion requires a solute-specific protein carrier Facilitated diffusion transports solute against its’ concentration gradient Which of the following is TRUE about primary active cell membrane transport? It is a form of transport that requires a protein “pump” It is a form of transport that transports ions and/or solute against their concentration gradient It is a transport mechanism that requires energy released from the splitting of ATP by...
point During osmosis, water will travel across the membrane from an area of lower higher solute...
point During osmosis, water will travel across the membrane from an area of lower higher solute concentration. 1 point In a hypotonic solution, an animal cell may while a plant cell will O experience turgor, shrivels because of an outflow of water. O shrivel, bursts because of an inflow of water. O lyse, becomes turgid because of an inflow of water. O Neither plant or animals cells will gain or lose water. ere to search
Compare and Contrast Diffusion and Osmosis Diffusion Osmosis Is a gradient needed? Direction of movement in relation to the solute) Is a membrane required? Source of energy for movement What is moved
QUESTIONS 1. What is the difference between diffusion and osmosis? om one Slace to an to we movement OP water aaross ca membiane is the solute and the 2. In a salt water solution, the is the solvent. Part A: The Effect of Concentration on Rate of Diffusion 3. Based on your results, how does the concentration of a solute affect its rate of diffusion? Part B: The Effect of Molecular Weight on Rate of Diffusion 4. Based on your...
Bio 109-Osmosis and Diffusion b. What does it mean when the cell membrane is described as being selectively permeable? c. Distinguish between osmosis and diffusion. 5. Define the following terms: a. solute A Gubstance tnat is dissolvedina soluhon b. solvent The dissoluing ao a solu hoyn c. solution eneous mixture hun on d. organic molecule Revised 06/2011
6 microscopes slides and coverslips Vinegar Compound microscope PRE-LAB QUESTIONS 1. Define diffusion. Define osmosis. 2. diffusion being Which factors that influence the rate in 3. n. INTRODUCTION Living organisms are roughly 75-85% water. This makes water the universal solvent for biological solutions. Sugars, proteins, electrolytes, and organic molecules such as hormones are examples u In fa st all.cubctancer entering or leaving cells of difforont hielegieal ce.. dieeiad in
Dittusion of Molecules In this exercise you will investigate characteristics of molecules that facilitate diffusion, factors that influence diffusion rates, and diffusion of solutes through a selectively permeable membrane. Experiment A. Kinetic Energy of Molecules Materials dropper bottle of water slide and coverslip carmine powder (KM,04 compound microscope dissecting needle assim perman Introduction Molecules of a liquid or gas are constantly in motion because of the intrinsic kinetic energy in all atoms and molecules. In 1827, Robert Brown, a Scottish...
point During osmosis, water will travel across the membrane from an area of lower higher solute concentration. 1 point In a hypotonic solution, an animal cell may while a plant cell will O experience turgor, shrivels because of an outflow of water. O shrivel, bursts because of an inflow of water. O lyse, becomes turgid because of an inflow of water. O Neither plant or animals cells will gain or lose water. ere to search
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