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24 Cards in this Set

  • Front
  • Back
Selective barrier that allows for the passage of oxygen, wastes, and nutrients for the whole cell
Plasma membrane
Tiny organelles that make proteins
where ribosomal rna is synthesized and assembled. densely stained granules and fibers
suspended in cytosol, synthesize proteins that function within cytosol
free ribosomes
attached to outside ER or nuclear envelope, synthesize proteins included in membranes or exported from cells
bound ribosomes
regulates protein traffic and performs metabolic functions in the cell, directly continuous or connected by transfer of vesicles
endomembrane system
Accounts for more than half the total membrane in many eukaryotic cells, Is continuous with the nuclear envelope, network of membranous tubules & sacs called cisternae
endoplasmic reticulum
synthesize lipids, steroids, phospholipids, detoxifies drugs, alcohol, stores calcium ions
smooth ER
produces secretory proteins, makes insulin, secretes glycoproteins that are carried out in vesicles, membrane factory
rough ER
manufacturing, warehousing, sorting, shipping, especially extensive in cells specialized for secretion. cis/trans, receives/gives rise to vesicles, products modified in that time
golgi apparatus
membrane-bound sac of hydrolytic enzymes used to digest macromolecules, work best in acidic environment, destroy cells when needed
pump excess water out of cell to maintain appropriate concentration of salts
contracticle vacuole
encloses vacuole, part of endomembrane system
site of cellular respiration, inner membrane of it has cristae which gives a large surface area that enhances productivity of cellular respiration, has its own DNA,
NOT part of endomembrane system
parts of ER
ER, nucleus, nuclear envelope, transport vesicles, golgi apparatus, plasma membrane, vacuole, lysosome
contains own dna, 2 membranes each a phospholipid bilayer, enzymes embedded in each of membranes, plastid
specialized metabolic compartment bounded by single membrane, contains enzymes that transfer hydrogen to oxygen making hydrogen peroxide, stores catylase
thickest of fibers, determine position of organelles, direct intracellular transport, help separate chromosome copies during cell division, made of tubulin
microtubule-organizing center, where they grow out of, region near nucleus
actin filaments, thinnest, important in cell motility, myosin/actin -> contraction of muscle cells
main function is to enable cells towithstand mechanical stress that occurs when cells are stretched, specialized for bearing tension, reinforce shape of cell, framework of cytoskeleton, anchor the cell membrane,
intermediate filaments
outside cells, where cells sit to hold themselves in place, important in movement, adhesion, regulation, support, main ingredients are glycoproteins, regulate cell behavior
extracellular matrix
serve as receptors, places for recognition, carbohydrate covalently bonded to a protein
channels between plant cells for water, solutes, hormones to pass, unifies most of plant into one living continuum