Podcast
Questions and Answers
What caused the yellow circle of dead grass around where the ice cream maker was placed?
What caused the yellow circle of dead grass around where the ice cream maker was placed?
- Was isosmotic to the grass cells
- Froze the grass
- Was hyperosmotic to the grass cells (correct)
- Was hypoosmotic to the grass cells
What is the main component of an animal cell membrane?
What is the main component of an animal cell membrane?
- Polynucleotides (correct)
- Glycolipids
- Aquaporins
- Cholesterol
In an experiment with an artificial cell and a selectively permeable membrane, what happens when a 5M solution of glucose is injected into the cell and placed in water?
In an experiment with an artificial cell and a selectively permeable membrane, what happens when a 5M solution of glucose is injected into the cell and placed in water?
- No net change in cell weight
- Water moves into the cell (correct)
- Glucose moves out of the cell
- Water moves out of the cell
What would be the effect if glucose was injected into the artificial cell but it had a selectively permeable membrane allowing only glucose to pass?
What would be the effect if glucose was injected into the artificial cell but it had a selectively permeable membrane allowing only glucose to pass?
Which substance could be responsible for killing the grass due to osmotic effects?
Which substance could be responsible for killing the grass due to osmotic effects?
What role does cholesterol play in the structure of an animal cell membrane?
What role does cholesterol play in the structure of an animal cell membrane?
Which process involves the movement of molecules down their concentration gradient without the use of energy?
Which process involves the movement of molecules down their concentration gradient without the use of energy?
In the process of facilitated diffusion, what assists the movement of molecules across the cell membrane?
In the process of facilitated diffusion, what assists the movement of molecules across the cell membrane?
What process is described by a symporter moving glucose and sodium into a cell?
What process is described by a symporter moving glucose and sodium into a cell?
Which of the following is true about the movement of glucose in the process described by a symporter?
Which of the following is true about the movement of glucose in the process described by a symporter?
How does insulin affect the cellular uptake of glucose?
How does insulin affect the cellular uptake of glucose?
What type of molecules primarily compose the lipid layer that forms the foundation of cell membranes?
What type of molecules primarily compose the lipid layer that forms the foundation of cell membranes?
When a 5M glucose solution is injected into a cell and then placed in a 10M glucose solution, what will happen?
When a 5M glucose solution is injected into a cell and then placed in a 10M glucose solution, what will happen?
Turgor pressure in plant cells is observed when the cell's environment is:
Turgor pressure in plant cells is observed when the cell's environment is:
What initiates the sodium-potassium pump?
What initiates the sodium-potassium pump?
Cyclodextrins are compounds that can remove cholesterol from cell membranes. Which effect is most likely to have a large impact on cells as a result of cyclodextrin treatment?
Cyclodextrins are compounds that can remove cholesterol from cell membranes. Which effect is most likely to have a large impact on cells as a result of cyclodextrin treatment?
Which of the following factors affect membrane fluidity?
Which of the following factors affect membrane fluidity?
Which statement about osmosis is correct?
Which statement about osmosis is correct?
What is the primary purpose of freeze-fracture technique?
What is the primary purpose of freeze-fracture technique?
During diapedesis, what role do cell adhesion molecules play?
During diapedesis, what role do cell adhesion molecules play?
Which of the following molecules would be affected by membrane potential in terms of directional movement?
Which of the following molecules would be affected by membrane potential in terms of directional movement?
Under which condition would the rate of diffusion of molecules be fastest?
Under which condition would the rate of diffusion of molecules be fastest?
What is the purpose of diapedesis in the body?
What is the purpose of diapedesis in the body?
Which statement about freeze-fracture technique is incorrect?
Which statement about freeze-fracture technique is incorrect?
What happens to a cell when its internal solute concentration matches that of its environment?
What happens to a cell when its internal solute concentration matches that of its environment?
If a cell with a normal osmotic pressure of 4500 mmHg is placed in a solution with an osmotic pressure of 3500 mmHg, what will happen?
If a cell with a normal osmotic pressure of 4500 mmHg is placed in a solution with an osmotic pressure of 3500 mmHg, what will happen?
In individuals with normal blood sugar levels, why is glucose not present in urine?
In individuals with normal blood sugar levels, why is glucose not present in urine?
In individuals with untreated diabetes mellitus, why is glucose present in urine?
In individuals with untreated diabetes mellitus, why is glucose present in urine?
Which statement best describes the mechanism of glucose reabsorption in the kidney?
Which statement best describes the mechanism of glucose reabsorption in the kidney?
In individuals with normal blood sugar levels, what prevents glucose from being excreted in urine?
In individuals with normal blood sugar levels, what prevents glucose from being excreted in urine?
