Podcast
Questions and Answers
Why is membrane transport important?
Why is membrane transport important?
- To facilitate the diffusion of large solutes
- To maintain a high permeability for ions
- To protect metabolic reactions within the cell from the environment (correct)
- To allow communication between cells
What is the role of transport proteins in the cell membrane?
What is the role of transport proteins in the cell membrane?
- Create a hydrophobic barrier
- Facilitate controlled interaction with the environment (correct)
- Provide energy for metabolic reactions
- Increase membrane permeability for large solutes
What type of molecules have high permeability through the membrane?
What type of molecules have high permeability through the membrane?
- Small hydrophobic molecules (correct)
- Large solutes
- Charged molecules
- Ions
What creates a hydrophilic passage for molecules in facilitated diffusion?
What creates a hydrophilic passage for molecules in facilitated diffusion?
What drives the movement of molecules across membranes?
What drives the movement of molecules across membranes?
What is the net driving force for molecule movement across membranes?
What is the net driving force for molecule movement across membranes?
What is the main difference between active transport and passive transport?
What is the main difference between active transport and passive transport?
What is a common feature of transport proteins for active transport?
What is a common feature of transport proteins for active transport?
In co-transport systems, which principle describes the movement of the driver ion and substrate in the opposite direction?
In co-transport systems, which principle describes the movement of the driver ion and substrate in the opposite direction?
How are ion channels different from carriers in passive transport?
How are ion channels different from carriers in passive transport?
Which type of transporter is driven by the hydrolysis of ATP?
Which type of transporter is driven by the hydrolysis of ATP?
How would you describe the role of protein pumps in establishing electrochemical gradients?
How would you describe the role of protein pumps in establishing electrochemical gradients?
