16 Questions
What are the 4 components of cellular membranes?
Phospholipid bilayer, transmembrane proteins, interior protein network, cell surface markers
What makes the fatty acids in phospholipids hydrophobic?
Their nonpolar nature
What characterizes integral membrane proteins?
Possess at least one transmembrane domain
What is the movement of molecules through the membrane in passive transport?
In response to a concentration gradient
What is the process of movement of water from an area of high to low concentration of water?
Osmosis
In passive transport, which solution has a higher solute concentration?
Hypertonic solution
What regulates the flow of water through aquaporins in the cell membrane?
Proteins
What is the movement of molecules from high concentration to low concentration in passive transport?
Diffusion
What type of proteins allow the cell to be selective about what passes through the membrane?
Channel proteins
What is the main difference between channel proteins and carrier proteins?
Channel proteins have a polar interior, while carrier proteins bind to specific molecules
What is the process of movement of a molecule from high to low concentration with the help of a carrier protein called?
Facilitated diffusion
Which type of transport requires energy and moves substances from low to high concentration?
Active transport
What is the main difference between uniporters, symporters, and antiporters?
Uniporters move one molecule at a time, symporters move two molecules in the same direction, and antiporters move two molecules in opposite directions
What is the main function of the sodium-potassium (Na+-K+) pump?
To move 3 Na+ out of the cell and 2 K+ into the cell
What is the process of movement of substances into the cell called?
Endocytosis
What type of transport involves the movement of materials out of the cell?
Exocytosis
Test your knowledge of cell membrane structure with this quiz. Explore the components of cellular membranes, including phospholipid bilayers, transmembrane proteins, interior protein networks, and cell surface markers. Learn about the structure of phospholipids and their role in cell membrane function.
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