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30 Cards in this Set

  • Front
  • Back
Plasma Membrane
-Phospholipid bilayer with proteins & carbs (sugars)
-Forms the outer boundary of the cell
*Controls movement in to & out of cell
*Cell-to-Cell Communication
-Folds of the plasma membrane forming tiny extensions of cytoplasm
*Increases surface area of cell for increased absorption or secretion
Large, spherical body that is composed of nucleoli & chromatin
-Enclosed by a nuclear envelope with pores
*Control center
*DNA within the genes directs cellular activities & cellular structure
-Small spherical body in the nucleus
*Synthesizes rRNA
*Assembles rRNA with protein to produce ribosomes
-Long,thin strands of DNA & proteins dispersed in nucleus
-Condensed to form chromosomes during cell division
*Carries hereditary info in genes & condenses to form chromosomes during cell division
-Region of the cell that includes cytosol & organelles
*Area where many components are involved in metabolism
-Fluid portion of cytoplasm that surrounds the organelles
*Allows diffusion of substances throughout the cell
-Organized "little organs" within the cytoplasm
*Each organelle has specific cell functions
-Oval, double-membrane-bound organelle
*Site of aerobic cellular respiration for ATP production
-Tiny bodies composed of rRNA & protein
-Found in cytosol or attached to for RER
*Site of protein synthesis
Rough Endoplasmic Reticulum
-Flattened, membrane-bound channels with ribosomes attached
-Extending from nuclear envelope throughout cytoplasm
*Processes & transports proteins made at attached ribosomes
*Synthesizes phospholipids
Smooth Endoplasmic Reticulum
-Extends from RER as a membrane-bound, tubular network without ribosomes
*Lipid & steroid synthesis
*Detoxifies toxic substances (drugs)
Golgi Complex
-Curved flattened membranous sacs with bulging edges & small vesicles nearby
*Receives & modifies proteins from RER
*Sorts & transports them
Secretory Vesicles
-Small membrane-bound vesicles
*Secretes substances outside the shell by exocytosis
-Membrane-bound vesicles formed from Golgi complex
-Contain digestive & hydrolytic enzymes
*Enzymes digest & recycle worn out organelles & substances entering the cell
*Can digest the cell
-Small, membrane-bound vesicles containing enzymes
*Produces hydrogen peroxide
Detoxifies harmful substances
-Protein filaments throughout the cell
*Structural framework for the cell
-Thinnest filaments made of actin
*Support & generate cellular movement
-Long, hollow tubes of tubulin
*Cell shape
*Movement of organelles
Intermediate filaments
-Intermediate diameter filaments
*Hold organelles in position
Centrosome (Centrioles)
-2 perpendicular, cylindrical centrioles & material around the centrioles
*Forms mitotic spindle fibers & microtubules for cilia & flagella
-Short, abundant, hair-like projections formed of microtubules
Move fluid & particles along cell surface by beating together
-Long cell projections & microtubules
*Whip-like motion moves sperm
Cell structures not found in most human cells
Microvilla, Cilia, & Flagella
Skeletal muscle cells
-Long. cylindrical cells which contract (shorten in length) to move bones
Pseudostratified columnar epithelial cells
-Have cilia which move substances like mucus across surface of cells
Motor neurons
-Nervous tissue cells with many processes (cell extensions) that receive info from other neurons & send electrical signals to muscle cells causing them to contract
Sperm cells
-Small, oval cells with a flagellum which propels them through the female reproductive tract
Red Blood Cells (RBCs)
-Do not have a nucleus (anucleate)
-But contain large amounts of hemoglobin, a red pigment that binds oxygen
White Blood Cells (WBCs)
-Have nuclei with different shapes& defend the body from pathogens & cancerous cells