Cell Structures and their Function Flashcards
Within a cell, specialized structure performs specific functions
organelles
living material surrounding the nucleus
cytoplasm
cytoplasm is enclosed by
cell membrane or plasma membrane
other term for cell membrane
plasma membrane
four main functions of a cell
- cell metabolism and energy use
- synthesis of molecules
- communication
- reproduction and inheritance
energy released during metabolism is used for cell activities
cell metabolism and energy use
cell synthesize various types of molecules, including proteins, nucleic acid and lipids
synthesis of molecules
cells produce and receive chemical and electrical signals
communication
each cell contains a copy of the genetic information of the individual
reproduction and inheritance
substance outside the cell
extracellular
inside the cell
cytoplasmic or intracellular
other term for cytoplasmic
intracellular
functions of a cell membrane
- supporting the cell contents
- acting as a selective barrier that determines what moves into and out of the cell
- playing a role in communication between cell
two major types of molecules in cell membrane
- phospholipids
- proteins
allow some substances, but not others, to pass into or out of the cell
selectively permeable
passive membrane transport mechanism
- diffusion
- osmosis
- facilitated diffusion
active membrane mechanism
- active transport
- secondary active transport
- endocytosis
- exocytosis
composed of two major parts, solutes and solvents
solution
dissolved in a predominant liquid or gas
solutes
predominant liquid or gas
solvent
solute moving from higher concentration to a lower concentration in solution
diffusion
difference in the concentration of a solute in a solvent between two points divided by the distance between the two points
concentration gradient
diffusion of water across selectively permeable membrane
osmosis
osmosis occurs when…
cell membrane is less permeable, selectively permeable, or not permeable to solutes and a concentration gradient for water exist across the cell membrane
force required to prevent the movement of water across a selectively permeable membrane
osmotic pressure
hypo
under