D312 Anatomy and Physiology 1, Section 1, Lesson 2 ACTUAL UPDATED
QUESTIONS AND CORRECT ANSWERS
What are the 3 major components for a cell? Nucleus, cytoplasm, and cell membrane
, Define cell membrane? the cell membrane separates the inner contents of a cell from its exterior
environment and provides a protection barrier around the cell and regulates
which materials can pass in or out.
What makes up the cell membrane? an extremely pliable structure composed of back-to-back phospholipids (a
bilayer).
What is the role of cholesterol in the cell membrane? contributes to the fluidity of the membrane
Are the various proteins embedded within the membrane No, the membrane needs to remain fluid so the lipids and proteins in the cell
locked in place? membrane are not rigidly locked in place.
What are the 2 common types of membrane proteins? Integral and peripheral
Define integral protein a protein that is embedded in the membrane such as a channel protein that
selectively allows particular materials to pass into or out of the cell.
Define peripheral proteins found in the inner layer or outer surface of the lipid bilayer but can also be
attached to the internal or external surface of an integral protein. Some
peripheral proteins on the surface of intestinal cells, act as digestive enzymes to
break down nutrients to sizes that can pass through the cells and into the
bloodstream.
What do cell recognition proteins do and what type of They serve to mark a cell's identity so that it can be recognized by other cells.
protein are they? They are integral proteins.
Name 2 recognition proteins. Receptor and Ligand
Define receptor proteins a type of recognition protein that can selectively bind a specific molecule outside
the cell, and this binding induces a chemical reaction within the cell.
QUESTIONS AND CORRECT ANSWERS
What are the 3 major components for a cell? Nucleus, cytoplasm, and cell membrane
, Define cell membrane? the cell membrane separates the inner contents of a cell from its exterior
environment and provides a protection barrier around the cell and regulates
which materials can pass in or out.
What makes up the cell membrane? an extremely pliable structure composed of back-to-back phospholipids (a
bilayer).
What is the role of cholesterol in the cell membrane? contributes to the fluidity of the membrane
Are the various proteins embedded within the membrane No, the membrane needs to remain fluid so the lipids and proteins in the cell
locked in place? membrane are not rigidly locked in place.
What are the 2 common types of membrane proteins? Integral and peripheral
Define integral protein a protein that is embedded in the membrane such as a channel protein that
selectively allows particular materials to pass into or out of the cell.
Define peripheral proteins found in the inner layer or outer surface of the lipid bilayer but can also be
attached to the internal or external surface of an integral protein. Some
peripheral proteins on the surface of intestinal cells, act as digestive enzymes to
break down nutrients to sizes that can pass through the cells and into the
bloodstream.
What do cell recognition proteins do and what type of They serve to mark a cell's identity so that it can be recognized by other cells.
protein are they? They are integral proteins.
Name 2 recognition proteins. Receptor and Ligand
Define receptor proteins a type of recognition protein that can selectively bind a specific molecule outside
the cell, and this binding induces a chemical reaction within the cell.
