Multiple Choice
Which of the following best describes the process of facilitated diffusion across a cell membrane?
313
views
6. The Membrane
Simple and Facilitated Diffusion
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How are simple diffusion and facilitated diffusion similar?
A
Both processes involve the movement of molecules down their concentration gradient.
B
Both processes require energy input from the cell.
C
Both processes move molecules against their concentration gradient.
D
Both processes require the presence of transport proteins.
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, down their concentration gradient.
Identify the characteristics of simple diffusion: Simple diffusion does not require energy input from the cell and does not involve transport proteins. It occurs directly across the phospholipid bilayer of the cell membrane.
Identify the characteristics of facilitated diffusion: Facilitated diffusion also moves molecules down their concentration gradient but requires the presence of transport proteins to help molecules that cannot easily pass through the cell membrane.
Compare the energy requirements: Both simple diffusion and facilitated diffusion do not require energy input from the cell, distinguishing them from active transport processes.
Summarize the similarities: Both simple diffusion and facilitated diffusion involve the passive movement of molecules down their concentration gradient, but facilitated diffusion requires transport proteins, while simple diffusion does not.
5:10mWatch next
Master Simple and Facilitated Diffusion with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Simple and Facilitated Diffusion practice set
Problem sets built by lead tutorsExpert video explanations