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level: part 3

Questions and Answers List

level questions: part 3

Question	Answer
molecules move away from areas where they are more concentrated to areas more they are less concentrated	diffusion
diffusion of water through a selectively permeable membrane such as the plasma membrane is specifically called	osmosis
provides passage for certain needed substances	facilitated diffusion
unassisted diffusion of solutes through the plasma membrane	simple diffusion
water and solutes are forced through a membrane by fluid, or hydrostatic, pressure	filtration
cause no visible changes in cells	isotonic
when blood cells are exposed to this - the cells begin to shrink	hypertonic
active transport uses ATP to energize its protein	solute pumps
"out of the cell"	exocytosis
to eject certain cellular wastes	exocytosis
enclosing them in a vesicle	endocytosis
series of changes a cell goes through from the time it is formed until it divides	cell life cycle
cell grows and carries on its usual metabolic activities	interphase
endocytosis process is more specifically called -	phagocytosis
dna molecule is duplicated exactly in a process called -	DNA replication
division of the nucleus	mitosis
division of dividing nucleus into two daughter nuclei	mitosis
prophase in reverse	telophase
division of the cytoplasm	cytokinesis
the centrometers that have held the chromatids together split	anaphase
biological catalyst that speed up every chemical reaction that occurs in cells	enzymes
DNA segment that carries the information for building one protein	gene
form the ribosomes	ribosomal RNA
carry the message containing instructions for protein synthesis from the DNA	RNA
escort amino acids to the ribosome	transfer RNA
transfer of information	transcription
language of nucleic acid	translation
trusted messenger to carry the instructions for building proteins to the ribosomes	ribonucleic acid
group of cells that are similar in structure and function	tissues
lining, covering, and glandular tissue of the body	epithelial tissue
their functions include protection, absorption, filtration, and secretion	epithelial
this tissue has no blood supply of their own and regenerate themselves easily	epithelial tissues
one layer of cells	simple epithelium
more than one cell layer	stratified epithelium