Anatomy and Physiology - chapter 3
Study Guide with 100% Correct Answers
plasma membrane - Answer forms the outer boundary of the cell, through which the cell interacts with
its external environment
nucleus - Answer directs cell activities, most of which take place in the cytoplasm; usually located near
the center of the cell
organelle - Answer specialized structure that performs a specific function
intracellular - Answer substances inside the cell
extracellular - Answer substances outside the cell
membrane potential - Answer charge difference across the plasma membrane resulting from the
regulation of ion movement
glycocalyx - Answer collection of glycolipids, glycoproteins and carbohydrates on the outer surface of
the plasma membrane
phospholipids and cholesterol - Answer predominant lipids of the plasma membrane
liquid bilayer - Answer double layer of phospholipid molecules
hydrophilic - Answer "water-loving"
hydrophobic - Answer "water-fearing"
, fluid-mosaic model - Answer model suggesting that the plasma membrane is neither rigid nor static in
structure, but is highly flexible and can change its shape and composition through time
cholesterol - Answer limits the movement of phospholipids, providing stability to the plasma membrane
marker molecule - Answer cell surface molecule that allows a cell to identify other cells or other
molecules
glycoprotein - Answer protein with attached carbohydrate
glycolipid - Answer lipid with attached carbohydrate
integral (intrinsic) protein - Answer protein molecule that penetrates deeply into the lipid bilayer
peripheral (extrinsic) protein - Answer protein molecule attached to either the inner or outer surface of
the lipid bilayer
attachment protein - Answer integral protein that allows a cell to attach to other cells or to extracellular
molecules
cadhedrin - Answer protein that attaches a cell to other cells
integrin - Answer protein that attaches a cell to extracellular molecules
transport protein - Answer integral protein that allows ions or molecules to move from one side of the
plasma membrane to the other
channel protein - Answer on or more integral proteins arranged so that they form a tiny channel through
the plasma membrane
Study Guide with 100% Correct Answers
plasma membrane - Answer forms the outer boundary of the cell, through which the cell interacts with
its external environment
nucleus - Answer directs cell activities, most of which take place in the cytoplasm; usually located near
the center of the cell
organelle - Answer specialized structure that performs a specific function
intracellular - Answer substances inside the cell
extracellular - Answer substances outside the cell
membrane potential - Answer charge difference across the plasma membrane resulting from the
regulation of ion movement
glycocalyx - Answer collection of glycolipids, glycoproteins and carbohydrates on the outer surface of
the plasma membrane
phospholipids and cholesterol - Answer predominant lipids of the plasma membrane
liquid bilayer - Answer double layer of phospholipid molecules
hydrophilic - Answer "water-loving"
hydrophobic - Answer "water-fearing"
, fluid-mosaic model - Answer model suggesting that the plasma membrane is neither rigid nor static in
structure, but is highly flexible and can change its shape and composition through time
cholesterol - Answer limits the movement of phospholipids, providing stability to the plasma membrane
marker molecule - Answer cell surface molecule that allows a cell to identify other cells or other
molecules
glycoprotein - Answer protein with attached carbohydrate
glycolipid - Answer lipid with attached carbohydrate
integral (intrinsic) protein - Answer protein molecule that penetrates deeply into the lipid bilayer
peripheral (extrinsic) protein - Answer protein molecule attached to either the inner or outer surface of
the lipid bilayer
attachment protein - Answer integral protein that allows a cell to attach to other cells or to extracellular
molecules
cadhedrin - Answer protein that attaches a cell to other cells
integrin - Answer protein that attaches a cell to extracellular molecules
transport protein - Answer integral protein that allows ions or molecules to move from one side of the
plasma membrane to the other
channel protein - Answer on or more integral proteins arranged so that they form a tiny channel through
the plasma membrane
