UNE: PHSL 1010 Exam 1 Study Guide questions and complete correct answers
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Module
UNE: PHSL 1010
Institution
UNE: PHSL 1010
integral proteins - correct answer Penetrate the hydrophobic interior of the lipid bilayer. Commerce via facilitated or active.
peripheral protein - correct 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.
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UNE: PHSL 1010 Exam 1 Study Guide
integral proteins - correct answer Penetrate the hydrophobic interior of the lipid bilayer. Commerce via facilitated or active.
peripheral protein - correct 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 - correct answer Linked with protein or lipids and function as adhesion.
Cholesterol - correct answer Steroid common in cell membranes, also in many hormones. Functions as support make the membrane more rigid and less soluble.
Structural protein - correct answer used for support such as connective tissue and keratin that forms hair and finger nails
enzyme (protein) - correct answer A type of protein that speeds up a chemical reaction in a living thing
receptor protein - correct 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 - correct 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 - correct answer membrane proteins that form junctions between adjacent cells
simple diffusion (passive transport) - correct answer Nonpolar lipid soluble substances diffuse directly through the phospholipid bilayer. (Solids Only)
facilitated diffusion - correct answer Movement of specific molecules across cell membranes through protein channels. Passive transport down the electrochemical gradient. primary active transport - correct answer Active transport that relies directly on the hydrolysis of ATP . Goes against electrochemical gradient.
secondary active transport - correct answer Driven by ion movement down its gradient.
transport/channel proteins - correct answer allow passage of hydrophilic substances across the membrane
gated channel protein - correct answer A transport protein that opens a "gate," allowing a molecule to flow through the membrane.
Endocytosis - correct answer process by which a cell takes material into the cell by infolding of the cell membrane
protein pumps - correct answer transport proteins that require energy to do work
sodium-potassium pump - correct 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 - correct answer the current in a circuit equals the voltage difference divided by the resistance, V=IR
Conductance - correct answer the ease with which ions flow through a channel. G = conductance.
conductance of potassium - correct answer Ionic conductance of K is slower, resting membrane potential due mostly to K.
conductance of sodium - correct answer G(k) >> G(Na), AP is triggered by influx of Na into the cell.
electrical potential difference - correct answer The change in potential energy per unit charge in an electric field.
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