18 terms


Cell Structure & Function
The basic structural and functional unit of the human body is
The cell
The watery (and salty) medium that surrounds a cell is known as
Extracellular fluid
Cell membranes are said to be
Selectively permeable
The movement if oxygen from an area of high concentration to an area of low concentration is an example of
The movement of water across a membrane from an area of low solute concentration to an area of higher solute concentration is known as
Water molecules and small ions enter a cell through
Channels in some cell membrane proteins
A solution that contains a lower solute concentration than the cytoplasm of a cell is called
Facilitated diffusion differs from ordinary diffusion in that facilitated diffusion
Limits the rate of molecular movement by the number of available carrier molecules
A process that requires cellular energy to move a substance against its concentration gradient is called
Active transport
What is the correct sequence for -DNA -tRNA -mRNA -protein
-DNA -mRNA -tRNA -protein
All of the triplet codes needed to produce a specific polypeptide chain are found in a
Hemolysis occurs when a blood cell is placed into
Hypotonic solution
If the amount of sodium ion in blood plasma increases
the blood osmotic pressure will increase
When sodium ions are moved across the cell membrane against the concentration gradient
Cellular ATP is used
The classes of membrane proteins that permit water and solutes to bypass the lipid portion of the cell membrane are
Channel proteins
The process that separates solid particles from liquids is known as
The term cancer refers to
-Any of various malignant neoplasms
-Neoplasms that have the tendency to metastasize to new sites
-An illness characterized by malignant cells
Which is NOT a function of the cell membrane?
Controlling movement into the nucleus