Radience

Cell Structure and Function

Science

active transport

the movement of materials through the cell membrane using energy
active transport Simple Definition

cell

the basic unit of life
cell Simple Definition

cell membrane

the cell boundary that controls what enters and leaves the cell
cell membrane Simple Definition

cell theory

cells make up all organisms, are the basic units of life, and come from other cells
cell theory Simple Definition

cell wall

the rigid structure around a plant cell that supports and protects it
cell wall Simple Definition

centriole

cell organelles made of microtubules
centriole Simple Definition

chloroplast

the plant organelle that uses light energy to make food
chloroplast Simple Definition

cytoplasm

a jellylike material in a cell
cytoplasm Simple Definition

cytoskeleton

the protein network that controls the cells shape and movement
cytoskeleton Simple Definition

diffusion

the movement of molecules from an area of higher density to an area of lower density
diffusion Simple Definition

endocytosis

a cell taking in a substance by surrounding it with its cell membrane
endocytosis Simple Definition

endoplasmic reticulum

the membranes in a cells cytoplasm that move proteins
endoplasmic reticulum Simple Definition

eukaryote

a cell that has a membrane and a nucleus
eukaryote Simple Definition

exocytosis

the process by which a cell removes materials through its vesicle
exocytosis Simple Definition

facilitated diffusion

the transport of materials across the cell membrane by transport proteins
facilitated diffusion Simple Definition

flagellum

a long, tail-like structure that helps a cell to move
flagellum Simple Definition

fluid mosaic model

a model of the cell membrane showing molecules in constant motion
fluid mosaic model Simple Definition

golgi body

the cell structure that packages materials for transport within and out of cell
golgi body Simple Definition

hypertonic solution

a solution with a higher solute concentration than that of cells in that solution
hypertonic solution Simple Definition

hypotonic solution

a solution with a lower solute concentration than that of cells in that solution
hypotonic solution Simple Definition

isotonic solution

a solution with the same solute concentration as the cells it contains
isotonic solution Simple Definition

lysosome

a cell organelle that contains digestive enzymes
lysosome Simple Definition

mitochondrion

the cell organelle that releases energy from food molecules
mitochondrion Simple Definition

nucleolus

the organelle that produces ribosomes in eukaryotic cells, it is inside the nucleus
nucleolus Simple Definition

nucleus cell

the control center of a cell
nucleus cell Simple Definition

organelle

a structure in a cell, specialized to perform a specific function
organelle Simple Definition

osmosis

the diffusion of water through a semipermeable membrane
osmosis Simple Definition

passive transport

the movement of materials through a cell membrane without the use of energy
passive transport Simple Definition

phospholipid

a lipid that contains phosphorus, it makes up cell membranes
phospholipid Simple Definition

phospholipid bilayer

a double-layered sheet of phospholipids that makes up a cell membrane
phospholipid bilayer Simple Definition

prokaryote

a cell without a nucleus and other organelles, like bacteria
prokaryote Simple Definition

ribosome

a small cell structure that builds proteins
ribosome Simple Definition

selective permeability

the ability of cell membranes to allow some, but not all, substances to pass through
selective permeability Simple Definition

tissue

a group of similar cells working together to perform the same function
tissue Simple Definition

vacuole

the cell organelle that stores materials
vacuole Simple Definition

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