18 Questions
What is the primary function of channel proteins in the cell membrane?
To create a direct pathway for specific molecules to pass through
What is the characteristic of transport through channel proteins?
It is fast and involves a direct pathway
What is the mechanism of transport of carrier proteins?
Binding to specific molecules and changing shape
What is the characteristic of carrier proteins during transport?
They change shape during the transport process
Which type of transport protein is highly selective and often specific to certain molecules?
Both channel and carrier proteins
What is the difference between channel proteins and carrier proteins in terms of transport speed?
Channel proteins are faster, while carrier proteins are slower
What is the process by which solutes move from an area of low concentration to an area of high concentration, requiring energy and ATP?
Active transport
What is the term that describes the balance of water movement between the inside and outside of a cell, resulting in no net movement of water?
Isotonic
What is the term that describes the number of particles in a solution, with higher osmolarity indicating a more 'crowded' solution?
Osmolarity
What type of transport involves the movement of molecules from an area of high concentration to an area of low concentration, without the use of energy?
Passive transport
What is the term that describes the movement of water into or out of a cell, resulting in changes in cell shape and size?
Osmosis
What is the name of the pump that uses active transport to move sodium and potassium ions across the cell membrane?
Sodium-potassium pump
What is the primary function of facilitated diffusion in biological systems?
To aid the movement of molecules across the cell membrane that are unable to freely cross the phospholipid bilayer
What is the term for the continual exchange of water and solutes among body fluid compartments through processes such as filtration, reabsorption, diffusion, and osmosis?
Fluid distribution
What is the approximate percentage of total body water in a 70kg adult male?
60%
What is the term for the movement of molecules from an area of higher concentration to an area of lower concentration without the use of energy?
Diffusion
What is the term for the movement of water molecules from an area of higher concentration to an area of lower concentration through a selectively permeable membrane?
Osmosis
What is the term for the movement of molecules across the cell membrane that requires the use of energy?
Active transport
Test your understanding of channel proteins, a type of transport protein that forms a direct pathway for specific molecules to pass through the cell membrane. Learn about their function, transport mechanism, conformation, speed, and selectivity. Assess your knowledge of cellular transport processes.
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