UNE: PHSL 1010 Exam 1 Study Guide| Ques ons and
answers | Updated RATED A+ | NEW 2026
integral proteins
Penetrate the hydrophobic interior of the lipid bilayer. Commerce via facilitated or ac ve.
peripheral protein
A protein loosely bound to the surface of a membrane or to part of an integral protein and not
embedded in the lipid bilayer.
Carbohydrate group
Linked with protein or lipids and func on as adhesion.
Cholesterol
Steroid common in cell membranes, also in many hormones. Func ons as support make the
membrane more rigid and less soluble.
Structural protein
1. Help create cell junc ons that hold ssues together
2. Connect membrane to cytoskeleton to maintain the shape of the cell
3. A&ach cells to the EC matrix by linking cytoskeleton fibers to EC collagen and other protein
fibers.
Membrane Enzyme (Protein)
Catalyze chemical reac ons that take place on the inside or external surface of the cell.
Transfer signals from EC environment to cytoplasm.
Membrane Receptor Proteins
Membrane protein with carbohydrates a&ached that helps cells iden fy "self" and plays a role
in blood types, organ transplants, and germ recogni on.
Membrane Transport Proteins
, Moves molecules across membranes.
1. Typically involving ATP to transport small molecules or ions across membranes.
2. SLC superfamily include most facilitated diffusion transporters as well as some ac ve
transporters
Carrier Protein (Membrane Transport Proteins)
A membrane protein, specifically a transport protein, that holds onto molecules and changes
their shapes in a way that shu&les them across the membrane.
They are either open to the ICF or the ECF but not both at once
Channel Proteins (Membrane Transport Proteins
Crete water-filled passageways that directly link the ICF and ECF.
That is to say can be open at the same me to the ICF and ECF
Limita ons of Channel Proteins (Membrane Transport Proteins)
Allows more rapid transport across the membrane but generally are limited to moving small
ions and water
Limita ons of Carrier Proteins (Membrane Transport Proteins)
Slower transport but can move larger molecules
adhesion proteins
membrane proteins that form junc ons between adjacent cells
simple diffusion (passive transport)
Nonpolar lipid soluble substances diffuse directly through the phospholipid bilayer. (Solids Only)
facilitated diffusion
Movement of specific molecules across cell membranes through protein channels down their
concentra on gradient.
I.E Glucose
primary ac ve transport
answers | Updated RATED A+ | NEW 2026
integral proteins
Penetrate the hydrophobic interior of the lipid bilayer. Commerce via facilitated or ac ve.
peripheral protein
A protein loosely bound to the surface of a membrane or to part of an integral protein and not
embedded in the lipid bilayer.
Carbohydrate group
Linked with protein or lipids and func on as adhesion.
Cholesterol
Steroid common in cell membranes, also in many hormones. Func ons as support make the
membrane more rigid and less soluble.
Structural protein
1. Help create cell junc ons that hold ssues together
2. Connect membrane to cytoskeleton to maintain the shape of the cell
3. A&ach cells to the EC matrix by linking cytoskeleton fibers to EC collagen and other protein
fibers.
Membrane Enzyme (Protein)
Catalyze chemical reac ons that take place on the inside or external surface of the cell.
Transfer signals from EC environment to cytoplasm.
Membrane Receptor Proteins
Membrane protein with carbohydrates a&ached that helps cells iden fy "self" and plays a role
in blood types, organ transplants, and germ recogni on.
Membrane Transport Proteins
, Moves molecules across membranes.
1. Typically involving ATP to transport small molecules or ions across membranes.
2. SLC superfamily include most facilitated diffusion transporters as well as some ac ve
transporters
Carrier Protein (Membrane Transport Proteins)
A membrane protein, specifically a transport protein, that holds onto molecules and changes
their shapes in a way that shu&les them across the membrane.
They are either open to the ICF or the ECF but not both at once
Channel Proteins (Membrane Transport Proteins
Crete water-filled passageways that directly link the ICF and ECF.
That is to say can be open at the same me to the ICF and ECF
Limita ons of Channel Proteins (Membrane Transport Proteins)
Allows more rapid transport across the membrane but generally are limited to moving small
ions and water
Limita ons of Carrier Proteins (Membrane Transport Proteins)
Slower transport but can move larger molecules
adhesion proteins
membrane proteins that form junc ons between adjacent cells
simple diffusion (passive transport)
Nonpolar lipid soluble substances diffuse directly through the phospholipid bilayer. (Solids Only)
facilitated diffusion
Movement of specific molecules across cell membranes through protein channels down their
concentra on gradient.
I.E Glucose
primary ac ve transport
