18 Questions
Which of the following is a type of membrane protein?
All of the above
What is the purpose of a membrane receptor?
To facilitate receptor-mediated endocytosis
What is the driving force behind passive transport?
Concentration gradient
What is the role of a carrier protein in facilitated diffusion?
It interacts with the diffusing molecule to facilitate its movement across the membrane
What factors determine the rate of diffusion through a membrane?
All of the above
What is the difference between a permeable and impermeable membrane?
Permeable membranes allow substances to pass through, while impermeable membranes do not.
What is the process by which a molecule moves across a lipid bilayer without the aid of a membrane protein?
Simple diffusion
Which of the following processes requires a membrane protein to facilitate the movement of molecules across the cell membrane?
Facilitated diffusion
What is the process by which cells engulf large particles or molecules?
Phagocytosis
Which of the following processes requires energy from the cell?
Primary active transport
What is the process by which antibodies assist in the recognition and binding of particles during phagocytosis?
Opsonization
Which of the following processes is the primary means by which large macromolecules, such as proteins, enter cells?
Pinocytosis
What type of transport involves the movement of substances into or out of the cell with the expenditure of energy?
Active transport
Which protein structures permit the rapid passage of water through the membrane?
Aquaporins
In facilitated diffusion, what substance is depicted moving from an area of higher concentration to lower concentration?
Glucose
Which type of transport uses pumps to move molecules from an area of low concentration to an area of high concentration?
Active transport
What is the primary source of energy in primary active transport?
Adenosine triphosphate (ATP)
In secondary active transport, where is the energy derived from?
Stored ionic concentration differences
Explore the different mechanisms of transport across the cell membrane such as simple diffusion, facilitated diffusion, and active transport. Learn about the role of aquaporins, carrier proteins, and pumps in maintaining cellular homeostasis.
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