Cell Membrane Study Guide

Mrs.Cochrans cell membrane study guide

Cytoskeleton

helps maintain cell shape

Cholesterol

hydrophobic molecule, changes fluidity of membrane

Transport protein

help carry substance across membrane

Glycolipid

cell recognition markers

Glycoproteins

recognition marker

Diffusion

particles move from an area of high concentration to an area of low concentration

passive transport

does not require energy from the cell

facilitated diffusion

protein channels in the membrane that help certain molecules across the membrane

Osmosis

Diffusion of water through a selectively permeable membrane using a protein channel called an aquaporin

Isotonic

the concentration of solutes in the solution and cell are the same

Hypertonic

When comparing two solutions; the solutions with the greater concentration of solutes

Exocytosis

how materials exit the cell

Endocytosis

how materials enter the cell

Pinocytosis

Cell drinking

Phagocytosis

Cell eating

lipid bilayer

Double layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings

Selectively Permeable

property of biological membrane that allow only some substances to pass across it while others cannot; also called semipermeable membrane

Homeostasis

relatively constant internal physical and chemical conditions that organisms maintain

aquaporin

water channel protein in a cell

Hypotonic

When comparing two solutions; the solution with the lesser concentration of solutes