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bio 5
chapter 2
21
Anatomy
Not Applicable
02/02/2011

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Term
phospholipids
Definition
responsible for the majority of the lipid bilayer
Term
cytology
Definition
the study of the structure and function of cells
Term
proteins
Definition
protiens found in plasma membrane act as receptors, chennels, transporters, exnymes, and cell identity markers
Term
proteins
Definition
protiens found in plasma membrane act as receptors, chennels, transporters, exnymes, and cell identity markers
Term
2 basic ways substances move in and out of the cell
Definition
passive movement and active transport
Term
diffusion
Definition
passive movement
solute moves down its concentration gradient. high concentration to a low concentration
Term
osmosis
Definition
the net movement of water througha selectively permeable membrane
Term
active transport
Definition
cellular energy required to transport substances acrross the PM against a concentration gradient
Term
endocytosis
Definition
phagocytosis or pinocytosis. bringing large quantities INTO the cell
Term
exocytosis
Definition
large quantities of substances released OUT of the cell
Term
cytosol
Definition
intracellular fluid-protiens, ions, nutrients and waste products
site of many chemical reactions
Term
nonmembranous organelles
Definition
provides structure and integrity to cell
Term
centrioles/centrosome
Definition
use microtubules-direct chromosome movement during cell division
Term
cilia
Definition
microtubles, move mucus
Term
flagella
Definition
only in sperm, like cilia but longer
motility
Term
ribosomes
Definition
site of protein synthesis
Term
endoplasmic reticulum
Definition
network of folded membranes
rough er: where ribosomes are attached
smooth er: site of lipid synthesis
Term
mitochondria
Definition
powerhouse of the cell. generates ATP
Term
golgi apparatus
Definition
synthesis and packing of secretions
directs final cellular products to specific destinations-intra or extracellular
Term
lysosomes
Definition
membrane enclosed vesicles containing digestive enzymes
Term
nucleus
Definition
contains the cell's genetic material: DNA

contains the nucleolus:specific genetic material RNA for ribosome synthesis

controls most cellular activities
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