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Cells - Sheltered Biology

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Terms in this set (22)

composed of a double membrane containing nucleic acids.
location:center of cell
Contains DNA that regulates protein synthesis and cell division.
Contains RNA

Image: nucleus

plasma membrane

Envelopes entire cell
Provides a barrier for the cell
regulates movement of materials in and out of cell

Image: plasma membrane

contains 60% RNA
40% protein
either attached to ER
or Unattached in the cytoplasm
provides attachment site for mRNA during protein synthesis

Image: ribosome

jelly-like substance inside the cell
composed of cytosol and organelles.
Region BETWEEN plasma membrane and nucleus
Cellular metabolism and other activities to maintain the cell.

Image: cytoplasm

found randomly throughout cytoplasm
Contains digestive enzymes that breakdown materials:
- brought into cell
-components within the cell
-components outside of the cell

Image: lysosome

sausage shape with inner folded membrane.
-Randomly throughout the cytoplasm
-site where ATP is produced during cellular respiration

Image: mitochondria

Smooth endoplasmic reticulum

-branching tubules that may be flattened or tubular
-No ribosomes
-winds and twists throughout cytoplasm
-site of lipid and carbohydrate assembly
-detoxification of drugs/alchohol

Image: Smooth endoplasmic reticulum

golgi apparatus (golgi complex)

-usually near nucleus with secretory
-vesicles near plasma
-prepare and package cellar products for transport

Image: golgi apparatus (golgi complex)

Composed of nine groups of three microtubules, forming a cylinders
-near the nucleus in the centrosome
-Participates in cell division

Image: centrioles

-thick, gel-like fluid mostly water and proteins
-surrounds organelles
-Transport of substances between organelles and other cell structures

Image: Cytosol

-formed bodies
-Suspended within cytosol
-Varied activities that maintain the cell

-Long, slender projections of the plasma membrane of certain cells
-Extend outward, away from the cell surface
-Rhythmic movements propel fluids across cell surfaces

Image: Cilia

-Long, whip like structure
-extends away from cell surface
-Movement of a cell(sperm)

Image: Flagellum

-Numerous, tiny folds of the plasma membrane
-Extend outward, away from the cell surface
-Increase the plasma membrane surface area for absorption or secretion

Image: Microvilli

Rough Endoplasmic Reticulum

-Ribosomes attached
-extends between nucleus and plasma membrane
-site for protein synthesis

Image: Rough Endoplasmic Reticulum