Podcast
Questions and Answers
What is the main source of energy for active transport across the cell membrane?
What is the main source of energy for active transport across the cell membrane?
- Urea
- Glycerol
- Aquaporins
- ATP (correct)
Which of the following is a function of aquaporins in living cells?
Which of the following is a function of aquaporins in living cells?
- Transporting glycerol
- Generating hydrostatic pressure
- Facilitating water flow (correct)
- Regulating turgor pressure
What is the role of coupled transport in cells?
What is the role of coupled transport in cells?
- Directly utilizing aquaporins
- Allowing passive movement of solutes
- Generating hydrostatic pressure
- Indirectly using ATP for transport (correct)
Which type of protein carriers are involved in active transport across membranes?
Which type of protein carriers are involved in active transport across membranes?
What distinguishes symporters from antiporters in active transport?
What distinguishes symporters from antiporters in active transport?
Which process requires energy to move substances from regions of lower to higher concentration?
Which process requires energy to move substances from regions of lower to higher concentration?
Which type of molecules can move through the hydrophobic lipid bilayer by simple diffusion?
Which type of molecules can move through the hydrophobic lipid bilayer by simple diffusion?
What kind of protein has a hydrophilic channel that allows polar molecules to pass through when the channel is open?
What kind of protein has a hydrophilic channel that allows polar molecules to pass through when the channel is open?
In facilitated diffusion, the transported molecule is released on the other side of the membrane when it binds to which type of protein?
In facilitated diffusion, the transported molecule is released on the other side of the membrane when it binds to which type of protein?
Which type of transport across the membrane moves substances freely by diffusion from regions of higher concentration to lower concentration?
Which type of transport across the membrane moves substances freely by diffusion from regions of higher concentration to lower concentration?
Which type of transport across the membrane is usually selective for one type of molecule, providing a selective permeable membrane?
Which type of transport across the membrane is usually selective for one type of molecule, providing a selective permeable membrane?
What is the role of the membrane protein described in the text?
What is the role of the membrane protein described in the text?
How does the Na+ gradient drive sugar molecules into the cell?
How does the Na+ gradient drive sugar molecules into the cell?
Which process is responsible for maintaining the Na+ gradient?
Which process is responsible for maintaining the Na+ gradient?
What is the function of ionophores in membrane transport processes?
What is the function of ionophores in membrane transport processes?
Which process involves the discharge of material from vesicles at the cell surface?
Which process involves the discharge of material from vesicles at the cell surface?
What occurs during receptor-mediated endocytosis?
What occurs during receptor-mediated endocytosis?
