L8 Cellular Transport

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What is the main characteristic of facilitated diffusion?

Molecules move through pores in channel proteins (correct)

Carrier proteins change shape

Moves molecules from low to high concentration

Requires energy or ATP

How do carrier proteins assist in moving molecules across the cell membrane?

Undergoing conformational changes

Extending through the membrane

Creating a membrane potential

Bonding, dragging molecules through the lipid bilayer, and releasing them on the opposite side (correct)

Which type of transport requires energy or ATP?

Secondary active transport

Facilitated diffusion

Symport

Primary active transport (correct)

What is the function of the sodium-potassium pump?

Transporting 3 Na+ out for every 2 K+ pumped in Signup and view all the answers

In primary active transport, where does the energy come from for the functions of carrier proteins?

Hydrolysis of ATP Signup and view all the answers

What is the term used for coupled transport when another molecule is moved in the same direction as Na+?

'Cotransport' Signup and view all the answers

What process is involved in the correction of YD's hyperkalemia during dialysis?

Passive diffusion Signup and view all the answers

Which compartment had the higher concentration of potassium in YD's case?

Blood Signup and view all the answers

What is the purpose of the semipermeable membrane in the hemodialysis filter?

To allow passive diffusion Signup and view all the answers

How did the concentration gradient help correct YD's hyperkalemia?

By causing potassium to move from blood to dialysate Signup and view all the answers

Which fluid had a lower potassium concentration in YD's case?

Dialysate Signup and view all the answers

What drives the force of diffusion during simple diffusion?

Magnitude of concentration gradient Signup and view all the answers

Which molecule can easily pass through the cell membrane via simple diffusion?

$O_2$ Signup and view all the answers

In which solution is there no net movement of water molecules?

Isotonic solution Signup and view all the answers

What is the main characteristic of facilitated diffusion?

Uses transport proteins Signup and view all the answers

What is the driving factor for osmosis?

Difference in water potential Signup and view all the answers

What type of molecules are typically impermeable to the cell membrane in simple diffusion?

Glucose Signup and view all the answers

What is the primary function of homeostasis?

To maintain a stable internal environment Signup and view all the answers

Which of the following is NOT a factor that affects the rate of diffusion?

Electrical charge of the molecules Signup and view all the answers

What is the process called when water molecules move from a region of higher water concentration to a region of lower water concentration across a selectively permeable membrane?

Osmosis Signup and view all the answers

Which of the following transport mechanisms requires the direct expenditure of energy by the cell?

Active transport Signup and view all the answers

In the clinical case presented, what process was involved in the correction of the patient's hyperkalemia during hemodialysis?

Diffusion Signup and view all the answers

Which of the following processes involves the formation of vesicles from the cell membrane?

Both exocytosis and endocytosis Signup and view all the answers

What process is involved when a molecule or ion moves in the opposite direction to Na+ (out of the cell)?

Countertransport (Antiport) Signup and view all the answers

Which process involves the movement of large molecules out of the cell through vesicles fusing with the plasma membrane?

Exocytosis Signup and view all the answers

In which process does the cell form an invagination to take in dissolved molecules?

Pinocytosis Signup and view all the answers

Which process is used by cells to engulf large particles such as food or bacteria?

Phagocytosis Signup and view all the answers

In which process do integral proteins with receptors on their surface recognize and take in hormones or cholesterol?

Receptor-mediated endocytosis Signup and view all the answers

What condition is the patient YD, a 62-year-old woman with type 2 diabetes mellitus, likely suffering from?

Hyperkalemia Signup and view all the answers

L8 Cellular Transport

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Questions and Answers

What is the main characteristic of facilitated diffusion?

How do carrier proteins assist in moving molecules across the cell membrane?

Which type of transport requires energy or ATP?

What is the function of the sodium-potassium pump?

In primary active transport, where does the energy come from for the functions of carrier proteins?

What is the term used for coupled transport when another molecule is moved in the same direction as Na+?

What process is involved in the correction of YD's hyperkalemia during dialysis?

Which compartment had the higher concentration of potassium in YD's case?

What is the purpose of the semipermeable membrane in the hemodialysis filter?

How did the concentration gradient help correct YD's hyperkalemia?

Which fluid had a lower potassium concentration in YD's case?

What drives the force of diffusion during simple diffusion?

Which molecule can easily pass through the cell membrane via simple diffusion?

In which solution is there no net movement of water molecules?

What is the main characteristic of facilitated diffusion?

What is the driving factor for osmosis?

What type of molecules are typically impermeable to the cell membrane in simple diffusion?

What is the primary function of homeostasis?

Which of the following is NOT a factor that affects the rate of diffusion?

What is the process called when water molecules move from a region of higher water concentration to a region of lower water concentration across a selectively permeable membrane?

Which of the following transport mechanisms requires the direct expenditure of energy by the cell?

In the clinical case presented, what process was involved in the correction of the patient's hyperkalemia during hemodialysis?

Which of the following processes involves the formation of vesicles from the cell membrane?

What process is involved when a molecule or ion moves in the opposite direction to Na+ (out of the cell)?

Which process involves the movement of large molecules out of the cell through vesicles fusing with the plasma membrane?

In which process does the cell form an invagination to take in dissolved molecules?

Which process is used by cells to engulf large particles such as food or bacteria?

In which process do integral proteins with receptors on their surface recognize and take in hormones or cholesterol?

What condition is the patient YD, a 62-year-old woman with type 2 diabetes mellitus, likely suffering from?

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