Podcast
Questions and Answers
What is the primary characteristic of facilitated diffusion?
What is the primary characteristic of facilitated diffusion?
- Relies on a finite number of carrier proteins (correct)
- Involves movement from low to high concentration
- Moves substances against a concentration gradient
- Requires energy input
Which statement is true about primary active transport?
Which statement is true about primary active transport?
- It involves movement of substances from low to high concentration
- It primarily relies on ion concentration gradients for transport
- All carriers act as enzymes with ATPase activity (correct)
- It requires a concentration gradient for movement
What is the function of the Na+-K+-ATPase pump?
What is the function of the Na+-K+-ATPase pump?
- Transports 2 Na+ out of the cell and 3 K+ into the cell
- Relies on passive diffusion for ion transport
- Creates a positive charge inside the cell compared to the outside
- Establishes a chemical potential difference between ECF and ICF (correct)
What is a distinguishing feature of secondary active transport?
What is a distinguishing feature of secondary active transport?
Which factor does NOT contribute to an increase in the rate of facilitated diffusion?
Which factor does NOT contribute to an increase in the rate of facilitated diffusion?
What happens at high extracellular fluid concentrations during facilitated diffusion?
What happens at high extracellular fluid concentrations during facilitated diffusion?
What is the main characteristic of molecules that undergo facilitated diffusion?
What is the main characteristic of molecules that undergo facilitated diffusion?
In facilitated diffusion, how do substances move across the membrane?
In facilitated diffusion, how do substances move across the membrane?
Which type of transport involves moving substances against their concentration gradient?
Which type of transport involves moving substances against their concentration gradient?
What is a common example of primary active transport?
What is a common example of primary active transport?
What type of molecules are typically transported through active carrier-mediated transport?
What type of molecules are typically transported through active carrier-mediated transport?
What is the major difference between facilitated diffusion and active transport?
What is the major difference between facilitated diffusion and active transport?
