Podcast
Questions and Answers
Which type of transport involves the movement of molecules in the direction determined by their relative concentrations inside and outside of the cell?
Which type of transport involves the movement of molecules in the direction determined by their relative concentrations inside and outside of the cell?
What is the main difference between passive diffusion and facilitated diffusion?
What is the main difference between passive diffusion and facilitated diffusion?
Which type of transporter enables large and polar (charged) molecules to cross the membrane without directly interacting with its hydrophobic interior?
Which type of transporter enables large and polar (charged) molecules to cross the membrane without directly interacting with its hydrophobic interior?
Which type of active transport uses energy or a gradient generated by another active transporter?
Which type of active transport uses energy or a gradient generated by another active transporter?
Signup and view all the answers
Which type of transporter transports only one molecule?
Which type of transporter transports only one molecule?
Signup and view all the answers
Which type of active transport is driven by a gradient that was generated by a primary active transporter?
Which type of active transport is driven by a gradient that was generated by a primary active transporter?
Signup and view all the answers
Which of the following is NOT a characteristic that affects the permeability of molecules?
Which of the following is NOT a characteristic that affects the permeability of molecules?
Signup and view all the answers
Which of the following is NOT an example of a common membrane protein?
Which of the following is NOT an example of a common membrane protein?
Signup and view all the answers
What is the main difference between ion channels and transport proteins?
What is the main difference between ion channels and transport proteins?
Signup and view all the answers
How are channels activated?
How are channels activated?
Signup and view all the answers
What is the process of facilitated diffusion?
What is the process of facilitated diffusion?
Signup and view all the answers
What are the three types of active transport?
What are the three types of active transport?
Signup and view all the answers
Which state of a transporter exposes the binding sites for solutes to the outside?
Which state of a transporter exposes the binding sites for solutes to the outside?
Signup and view all the answers
Which type of transport occurs spontaneously by diffusion and does not require energy?
Which type of transport occurs spontaneously by diffusion and does not require energy?
Signup and view all the answers
What is the main difference between active transport and passive transport?
What is the main difference between active transport and passive transport?
Signup and view all the answers
What happens during simple diffusion?
What happens during simple diffusion?
Signup and view all the answers
Which state of a transporter exposes the binding sites for solutes to the inside?
Which state of a transporter exposes the binding sites for solutes to the inside?
Signup and view all the answers
What is the main characteristic of active transport?
What is the main characteristic of active transport?
Signup and view all the answers
Which type of membrane proteins interact with solutes more weakly compared to transporters?
Which type of membrane proteins interact with solutes more weakly compared to transporters?
Signup and view all the answers
What is the function of aquaporins?
What is the function of aquaporins?
Signup and view all the answers
Which ion cannot be successfully accommodated in the selectivity filter of a channel?
Which ion cannot be successfully accommodated in the selectivity filter of a channel?
Signup and view all the answers
What is the main function of the Na+/K+-ATPase in animal cells?
What is the main function of the Na+/K+-ATPase in animal cells?
Signup and view all the answers
Which type of membrane protein binds a specific substrate to be transported and undergoes conformational changes to transfer the solute across the membrane?
Which type of membrane protein binds a specific substrate to be transported and undergoes conformational changes to transfer the solute across the membrane?
Signup and view all the answers
In which type of cells are aquaporins expressed on the plasma membrane to make water movement more efficient?
In which type of cells are aquaporins expressed on the plasma membrane to make water movement more efficient?
Signup and view all the answers
Which of the following is true about membrane transport proteins?
Which of the following is true about membrane transport proteins?
Signup and view all the answers
What restricts the passage of most polar molecules across the lipid bilayer?
What restricts the passage of most polar molecules across the lipid bilayer?
Signup and view all the answers
What is the result of an active transport and passive diffusion in maintaining the resting membrane potential of cells?
What is the result of an active transport and passive diffusion in maintaining the resting membrane potential of cells?
Signup and view all the answers
What is the electrochemical gradient of a charged solute influenced by?
What is the electrochemical gradient of a charged solute influenced by?
Signup and view all the answers
How do transporters typically span the plasma membrane?
How do transporters typically span the plasma membrane?
Signup and view all the answers
What are the common structural features of transport proteins?
What are the common structural features of transport proteins?
Signup and view all the answers
