IHS IB Bio
Crossing Cell Membranes: A Study Tool
Directions: Use Ch. 7, sections 7.2-7.5 to complete the table below. (Yes, this one you can write directly in!)
PROCESS
Across lipids or
proteins, or both?
Does
process take
energy?
In what
direction?*
Examples from Neil 9e, Ch. 7
Simple
diffusion
Aquaporin
s
Facilitated
diffusion
Protein
s
Channels
Carriers
Active
transport
Endocytosis
Exocytosis
*This is asking: Only down its concentration gradient, or, can it be moved against its concentration gradient?
IHS IB Bio
Crossing Cell Membranes: A Study Tool
Directions: Use Ch. 7, sections 7.2-7.5 to complete the table below. (Yes, this one you can write directly in!)
PROCESS
Across lipids or
proteins, or both?
Simple
diffusion
Aquaporin
s
Facilitated
diffusion
Protein
s
Channels
Carriers
Active
Does
process take
energy?
In what
direction?*
Examples from Neil 9e, Ch. 7
transport
Endocytosis
Exocytosis
*This is asking: Only down its concentration gradient, or, able to move it against its concentration gradient?