Cell Membrane to Cardiovascular System Quiz Part 1

Question 1 3/ 3pts What part of the phospholipid bilayer face outward?  the hydrophilic tails   the hydrophilic head group   the hydrophobic head group   the hydrophobic tails   Question 2 3/ 3pts The plasma membrane only allows certain molecules in or out of the cell which means it is ___________.  impermeable   semipermeable   permeable   Question 3 3/ 3pts In addition to the cell membrane, what else is composed of phospholipids?  organelle membranes   the fluid mosaic model   the cytoskeleton   the cell wall   Question 4 3/ 3pts The phospholipid has a _________ head and two _________ tails.        cytosol, cytoplasm   semipermeable, cytoplasm   hydrophobic, hydrophilic   hydrophilic, hydrophobic   Question 5 3/ 3pts In a prokaryotic cell, the DNA is located in the __________.  enzyme   phospholipid   cytoplasm   nucleus   Question 6 3/ 3pts Is a cell more likely to have one cilium or one flagellum?  one cilium   one flagellum   PartialQuestion 7 1.5/ 3pts Roles of membrane proteins include: ___________. Select all that apply.  enzymatic functions   hormone binding sites   cell signaling and cell adhesion   pumps and channels for transport   Question 8 3/ 3pts What part of the cell decides what is able to enter and leave the cell?  the nucleus   the golgi apparatus   the cytoplasm   the plasma membrane   Question 9 3/ 3pts The cell membrane controls what enters or leaves the cell.  True   False   Question 10 3/ 3pts The tails of phospholipid molecules in the cell membrane ___________.  are hydrophilic   are exposed to the cell's environment   are hydrophobic   contain phosphate groups   Question 11 1/ 1pts Carrier proteins carry the ion or molecule across the membrane by changing shape after the binding of the ion or molecule.  True   False   IncorrectQuestion 12 0/ 1pts Polar molecules and ions need a transport protein to diffuse across the cell membrane.  True   False   Question 13 1/ 1pts Ions or molecules other than water are carried across the cell membrane by ___________.  carrier proteins   none of the above   extrinsic proteins   phospholipid bilayers   Question 14 1/ 1pts Which of the following proteins bind to molecules or ions that change their conformation and carry them across the membrane?  carrier proteins   gated channel proteins   channel proteins   IncorrectQuestion 15 0/ 1pts Facilitated diffusion is not a type of passive transport.  True   False   Question 16 1/ 1pts A type of transport protein which acts like a pore in the membrane, letting water molecules or small ions through quickly, is known as a carrier protein.  True   False   Question 17 1/ 1pts Net movement of substances in facilitated diffusion is always __________ its concentration gradient.  either up or down   down   none of the above   up   Question 18 1/ 1pts Which of the following is a transport protein with a molecule-specific binding site that opens and closes based on stimulus?  carrier protein   gated channel proteins   channel protein   Question 19 1/ 1pts Diffusion of solutes through transport proteins in the plasma membrane is called facilitated diffusion.  True   False   Question 20 1/ 1pts __________ proteins "carry" the ion or molecule across the membrane by changing shape after the binding of the ion or molecule.  Channel   Carrier   None of the above   Gated channel   Question 21 1/ 1pts _________ molecules cannot pass freely across the plasma membrane.  Non-polar   none of the above   Both polar and non-polar   Polar   Question 22 1/ 1pts While passing molecules across the membrane, carrier proteins do not undergo conformational (shape) changes.  True   False   Question 23 1/ 1pts Passive transport requires energy.  True   False   Question 24 1/ 1pts Diffusion is a type of passive transport.  True   False