UNE: PHSL 1010 EXAM 1 STUDY GUIDE - 2026 UPDATE | QUESTIONS AND ANSWERS |
WITH COMPLETE SOLUTIONS.
integral proteins - (answer)Penetrate the hydrophobic interior of the lipid bilayer. Commerce via
facilitated or active.
peripheral protein - (answer)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 - (answer)Linked with protein or lipids and function as adhesion.
Cholesterol - (answer)Steroid common in cell membranes, also in many hormones. Functions as support
make the membrane more rigid and less soluble.
Structural protein - (answer)used for support such as connective tissue and keratin that forms hair and
finger nails
enzyme (protein) - (answer)A type of protein that speeds up a chemical reaction in a living thing
receptor protein - (answer)Membrane protein with carbohydrates attached that helps cells identify
"self" and plays a role in blood types, organ transplants, and germ recognition.
carrier protein - (answer)A membrane protein, specifically a transport protein, that holds onto
molecules and changes their shapes in a way that shuttles them across the membrane.
adhesion proteins - (answer)membrane proteins that form junctions between adjacent cells
simple diffusion (passive transport) - (answer)Nonpolar lipid soluble substances diffuse directly through
the phospholipid bilayer. (Solids Only)
facilitated diffusion - (answer)Movement of specific molecules across cell membranes through protein
channels. Passive transport down the electrochemical gradient.
, UNE: PHSL 1010 EXAM 1 STUDY GUIDE - 2026 UPDATE | QUESTIONS AND ANSWERS |
WITH COMPLETE SOLUTIONS.
primary active transport - (answer)Active transport that relies directly on the hydrolysis of ATP. Goes
against electrochemical gradient.
secondary active transport - (answer)Driven by ion movement down its gradient.
transport/channel proteins - (answer)allow passage of hydrophilic substances across the membrane
gated channel protein - (answer)A transport protein that opens a "gate," allowing a molecule to flow
through the membrane.
Endocytosis - (answer)process by which a cell takes material into the cell by infolding of the cell
membrane
protein pumps - (answer)transport proteins that require energy to do work
sodium-potassium pump - (answer)a carrier protein that uses ATP to actively transport sodium ions out
of a cell and potassium ions into the cell
Ohm's Law - (answer)the current in a circuit equals the voltage difference divided by the resistance, V=IR
Conductance - (answer)the ease with which ions flow through a channel. G = conductance.
conductance of potassium - (answer)Ionic conductance of K is slower, resting membrane potential due
mostly to K.
conductance of sodium - (answer)G(k) >> G(Na), AP is triggered by influx of Na into the cell.
electrical potential difference - (answer)The change in potential energy per unit charge in an electric
field.
WITH COMPLETE SOLUTIONS.
integral proteins - (answer)Penetrate the hydrophobic interior of the lipid bilayer. Commerce via
facilitated or active.
peripheral protein - (answer)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 - (answer)Linked with protein or lipids and function as adhesion.
Cholesterol - (answer)Steroid common in cell membranes, also in many hormones. Functions as support
make the membrane more rigid and less soluble.
Structural protein - (answer)used for support such as connective tissue and keratin that forms hair and
finger nails
enzyme (protein) - (answer)A type of protein that speeds up a chemical reaction in a living thing
receptor protein - (answer)Membrane protein with carbohydrates attached that helps cells identify
"self" and plays a role in blood types, organ transplants, and germ recognition.
carrier protein - (answer)A membrane protein, specifically a transport protein, that holds onto
molecules and changes their shapes in a way that shuttles them across the membrane.
adhesion proteins - (answer)membrane proteins that form junctions between adjacent cells
simple diffusion (passive transport) - (answer)Nonpolar lipid soluble substances diffuse directly through
the phospholipid bilayer. (Solids Only)
facilitated diffusion - (answer)Movement of specific molecules across cell membranes through protein
channels. Passive transport down the electrochemical gradient.
, UNE: PHSL 1010 EXAM 1 STUDY GUIDE - 2026 UPDATE | QUESTIONS AND ANSWERS |
WITH COMPLETE SOLUTIONS.
primary active transport - (answer)Active transport that relies directly on the hydrolysis of ATP. Goes
against electrochemical gradient.
secondary active transport - (answer)Driven by ion movement down its gradient.
transport/channel proteins - (answer)allow passage of hydrophilic substances across the membrane
gated channel protein - (answer)A transport protein that opens a "gate," allowing a molecule to flow
through the membrane.
Endocytosis - (answer)process by which a cell takes material into the cell by infolding of the cell
membrane
protein pumps - (answer)transport proteins that require energy to do work
sodium-potassium pump - (answer)a carrier protein that uses ATP to actively transport sodium ions out
of a cell and potassium ions into the cell
Ohm's Law - (answer)the current in a circuit equals the voltage difference divided by the resistance, V=IR
Conductance - (answer)the ease with which ions flow through a channel. G = conductance.
conductance of potassium - (answer)Ionic conductance of K is slower, resting membrane potential due
mostly to K.
conductance of sodium - (answer)G(k) >> G(Na), AP is triggered by influx of Na into the cell.
electrical potential difference - (answer)The change in potential energy per unit charge in an electric
field.
