Multiple Choice
Which of the following scenarios demonstrates active transport?
28
views
6. The Membrane
Active Transport
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The sodium-potassium pump is an example of which of the following processes?
A
Simple diffusion
B
Osmosis
C
Facilitated diffusion
D
Active transport
Verified step by step guidance1
Understand the sodium-potassium pump: It is a membrane protein that moves sodium (Na⁺) ions out of the cell and potassium (K⁺) ions into the cell against their concentration gradients.
Recall the definition of active transport: Active transport is the movement of molecules across a membrane from a region of lower concentration to a region of higher concentration, requiring energy in the form of ATP.
Compare active transport with other processes: Simple diffusion and facilitated diffusion involve movement along the concentration gradient and do not require energy, while osmosis specifically refers to the movement of water molecules.
Identify the key feature of the sodium-potassium pump: It uses ATP to move ions against their concentration gradients, which is the hallmark of active transport.
Conclude that the sodium-potassium pump is an example of active transport because it requires energy to function and moves ions against their concentration gradients.
Related Videos
Related Practice
Active Transport practice set
Problem sets built by lead tutorsExpert video explanations