Multiple Choice
Facilitated diffusion differs from simple diffusion because why?
9. Transport Across Membranes
Principles of Transmembrane Transport
Struggling with Cell Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following gradients describes an electrical charge difference across a membrane?
A
Concentration gradients
B
Electrical gradients
C
Electrochemical gradients
D
Membrane potential
Verified step by step guidance1
Understand the concept of a gradient: In cell biology, a gradient refers to a difference in concentration, charge, or pressure between two regions. Gradients drive the movement of substances across membranes.
Differentiate between types of gradients: Concentration gradients involve differences in the concentration of molecules across a membrane, while electrical gradients involve differences in charge.
Define electrical gradients: An electrical gradient is a difference in electric charge across a membrane, which can influence the movement of ions and other charged particles.
Explain electrochemical gradients: These are combined gradients of concentration and electrical charge, affecting the movement of ions across membranes.
Clarify membrane potential: This is the voltage difference across a cell membrane, resulting from the distribution of ions, and is a specific type of electrical gradient.
3:37mWatch next
Master Membranes and Gradients with a bite sized video explanation from Kylia
Start learningRelated Videos
Related Practice
Principles of Transmembrane Transport practice set
Problem sets built by lead tutorsExpert video explanations