vocab Flashcards
the process of maintaining a stable internal environment despite changes in the external environment.
Homeostasis
the movement of ions and molecules across the cell membrane without requiring energy
Passive transport
the process in which a substance moves through a semipermeable membrane or in a solution without any help from transport proteins
Simple Diffusion
a type of passive transport that uses channel proteins and carrier proteins, to help molecules move across a cell membran
Facilitated Diffusion
the gradual change in the concentration of solutes in a solution as a function of distance through a solution
Concentration Gradient
a protein that allows the transport of specific substances across a cell membrane
Channel Protein
A thin, flexible barrier that surrounds the cell and regulates what enters and leaves the cell
Cell Membrane
only allows specific molecules to pass
Selective Permeability
major components of the plasma membrane, the outermost layer of animal cells
Phospholipid
the structure of the plasma membrane as a mosaic of components —including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character
Fluid Mosaic Model
Diffusion of water
Osmosis
the solution that has the same concentration of solute in both surrounding solution and solution inside the cell
Isotonic Solution
A solution having a higher concentration of solute inside as compared to outside the cell
Hypertonic Solution
A solution having a lesser concentration of solute inside as compared to outside the cell
Hypotonic Solution
a process that involves the movement of molecules from a region of lower concentration to a region of higher concentration against a gradient, uses energy
Active Transport
