What name is given to the process by which water crosses a selectively permeable membrane?
phagocytosis
osmosis
pinocytosis
passive transport
diffusion
answer
osmosis
question
A semipermeable membrane is placed between the following solutions.
Which solution will decrease in volume?
Solution A: 1.4% (m/v) starch
Solution B: 7.62% (m/v) starch
answer
Solution A
question
A semipermeable membrane is placed between the following solutions.
Which solution will increase in volume?
Solution C: 9% (m/v) NaCl
Solution D: 12.4% (m/v) NaCl
answer
Solution D
question
To prevent crenation or hemolysis, a cell must be placed in an isotonic solution such as 0.9% (m/v) NaCl or 5.0% (m/v) glucose. This does not mean that a cell has a 5.0% (m/v) glucose concentration; it just means that 5.0% (m/v) glucose will exert the same osmotic pressure as the solution inside the cell, which contains several different solutes.
A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur.
Solution A: 3.21% (m/v) NaCl
Solution B: 1.65% (m/v) glucose
Solution C: distilled H2O
Solution D: 6.97% (m/v) glucose
Solution E: 5.0% (m/v) glucose and 0.9%(m/v) NaCl
Which Solution results to HEMOLYSIS?
answer
Solution B, C
question
To prevent crenation or hemolysis, a cell must be placed in an isotonic solution such as 0.9% (m/v) NaCl or 5.0% (m/v) glucose. This does not mean that a cell has a 5.0% (m/v) glucose concentration; it just means that 5.0% (m/v) glucose will exert the same osmotic pressure as the solution inside the cell, which contains several different solutes.
A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur.
Solution A: 3.21% (m/v) NaCl
Solution B: 1.65% (m/v) glucose
Solution C: distilled H2O
Solution D: 6.97% (m/v) glucose
Solution E: 5.0% (m/v) glucose and 0.9%(m/v) NaCl
Which solution resutls to CRENATION?
answer
Solution A, D, E
question
Which of the following molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism? Select all that apply.
water
ions
proteins
oxygen
carbon dioxide
lipids
sucrose
answer
water, oxygen, carbon dioxide, lipids
question
Provides a continuous path across the membrane
answer
Channel Proteins
question
Allow water molecules and small ions to flow quickly across the membranes
answer
Channel Proteins
question
Undergo a change in shape to transport solutes across the membrane
answer
Carrier Proteins
question
Transport primarily small polar organic molecules
answer
Carrier Proteins
question
Provide a hydrophilic path across the membrane
answer
Channel and Carrier Proteins
question
Are integral membrane proteins
answer
Channel and Carrier Proteins
question
Transport solutes down a concentration or electrochemical gradient
answer
Channel and Carrier Proteins
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