CHAPTER 3 Flashcards
smallest living functional unit
cell
three basic parts of a cell
plasma membrane, cytoplasm, nucleus
fluid outside the cell
extracellular material
made up of a phospholipid bilayer that controls what goes into and out of the cell
plasma (cell) membrane
___ ___ are part of the plasma membrane and their function is to bind cells together
cell junctions
- tight junctions
- desmosomes
- gap junctions
3 types of cell junctions
movement of molecules from an area of higher concentration to an area of lower concentration
(type of passive transport)
diffusion
type of passive transport
water particles move through a layer only certain molecules can pass through
(type of passive transport)
osmosis
large molecules that cannot cross are helped with carrier proteins
(type of passive transport)
facilitated diffusion
the ability of a solution to cause a cell to gain or lose water
tonicity
process in which a cell engulfs extracellular material through an inward folding of its plasma membrane (cytosis = referring to cells) (phagocytosis & pinocytosis)
endocytosis or exocytosis?
endocytosis
cellular “eating”
(type of endocytosis)
phagocytosis
cellular “drinking”
(type of endocytosis)
pinocytosis
process that moves large molecules and waste out of the cytoplasm and into the exterior of the cell
constitutive & regulated
endocytosis or exocytosis?
exocytosis
cells continuously release secretory materials
(type of exocytosis)
constitutive or regulated?
constitutive