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29 Cards in this Set
- Front
- Back
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Cell Membrane
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Encloses the cell
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Nucleus
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Houses the genetic material and controls cellular activities, and the cytoplasm.
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Cytoplasm
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Fills out the cell.
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Organelles
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Which can be seen clearly only under the higher magnification of electron microscopes.
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Selectively Permeable
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Means that only certain substances can enter or leave the cell.
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Cytoskeleton
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Meaning "cell skeleton".
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Endoplasmic Reticulum
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The endoplasmic reticulum is a complex organelle composed of membrane-bounded,flattened sacs, elongated canals, and fluid-filled, bubblelike sacs called vesicles.
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Ribosomes
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Ribosomes where proteins synthesis occurs, are attached to ER membranes or are scattered throughout the cytoplasm.
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Golgi apparatus
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The golgi apparatus is a stack of about six flattened, membrane sacs.
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Mitochondria
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Are elongated, fluid filled sacs that vary in size and shape.
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Lysosomes
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Garbage disposals of the cell. Tiny membranous sacs. pg 56 to reference
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Peroxisomes
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These membranous sacs are abundant in liver and kidney cells.
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Microfilaments and Microtubules
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Are two types of thin, threadlike strands in the cytoplasm.
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Centrosome
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A structure near the golgi apparatus and nucleus.
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Cilia and Flagella
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Are motile structures that extend from the surfaces of certain cells.
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Vesicles
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Membranous sacs that store or transport substances within a cell.
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Nuclear Envelope
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Consist of inner and outer lipid bilayer membranes.
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Nucleolus
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A small, dense body composed largely of RNA and protein.
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Chromatin
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loosely coiled fibers of DNA and protein that condense to form structures called chromosomes.
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Chromosomes
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Rodlike structure that condenses from chromatin in a cells nucleus during mitosis.
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Diffusion
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Tendency of molecules or ions in a lipid or air solution to move from regions of higher concentration to regions of lower concentration, thus becoming more evenly distributed or more diffuse.
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Facilitated Diffusion
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Uses the ion channels and pores described earlier.
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Osmosis
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The movement of water across a selectively permeable membrane into a compartment containing solute that cannot cross the same membrane.
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Isotonic
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Any solution that has the same osmotic pressure as body fluids.
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Hypertonic
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Solutions that have a higher osmotic pressure than body fluids.
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Hypotonic
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Solution which has a lower osmotic pressure than body fluids gain water by osmosis, therefore they swell.
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Filtration
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Forces molecules through membranes.
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Edema
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Fluid accumulation in tissue spaces.
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Active Transport
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Process that moves particles through membranes from a region of lower concentration.
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