All of the following are ways in which glucose can enter the cell EXCEPT: A)Na/K Pump B)Na/H Pump C)GLUT 2 D)facilitated diffusion
Question
All of the following are ways in which glucose can enter the cell EXCEPT: A)Na/K Pump B)Na/H Pump C)GLUT 2 D)facilitated diffusion
Solution
The correct answer is B) Na/H Pump.
Here's why:
A) Na/K Pump: While this doesn't directly facilitate glucose entry, it helps maintain the sodium gradient that is used by the sodium-glucose co-transporter to bring glucose into the cell.
B) Na/H Pump: This pump is not involved in glucose transport. It primarily functions to regulate pH within the cell by exchanging intracellular hydrogen ions for extracellular sodium ions.
C) GLUT 2: This is a type of glucose transporter found in the liver and pancreatic cells. It facilitates the passive transport of glucose into the cell.
D) Facilitated diffusion: This is a process by which substances are transported across cell membranes by means of protein carrier molecules. Since glucose is a polar molecule, it uses this method to cross the hydrophobic core of the plasma membrane.
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