Card Set Information
Dense body of RNA and Protein
Found in certain chromosomes
Factory for Ribosomes
Cell may contain more than one (especially if the cell is producing proteins)
Transports substances in and out of the cell
Tiny hair like parts that are on the Epithelial cells
Move fluids/substances across cell surfaces
Usually found in the respiratory tract and Fallopian tubes
Single mobile thread like projection (tail)
Larger than Cilia
Found in sperm cells (allows movement)
Contain centrioles composed of microtubules
Lie at right angles to each other in the cytoplasm near the Golgi Apparatus and Nucleus
Aid in cell reproduction
Organize spindle fibers during cell division
55% of the weight of the cell membrane
most span the entire cell membrane
more compact, serves as a channel for transport
more tightly coiled, rod like, serve as receptors
associated with the inner or outer surface fo the cell membrane
May function as enzymes
Embedded in the interior to make the membrane less permeable to water soluble substances and to help stabilize the membrane.
2 Layers of Phospholipid Bilayer
- (water-loving) "heads" contains phosphates, forms the "Surface" of the cell membrane
(water-fearing) "tails", made up of fatty acids, forms the "Interior" of the cell membrane
Cell (Plasma) Membrane
Outer layer that contains the materials within the cell
Selective permeable (allows some things through...ie calcium potassium, while rejecting others)
Phospholipid Bilayer (
Membranous sacs that contain digestive enzymes
"Garbage disposals" of the cell
Vescicles but with a specific purpose of removing garbage
Contains a small amount of DNA that provides info for making a few kinds of proteins and specialized RNA
"Power house" of cells / releases energy from food to form ATP (Adenosine Triphosphate)
Divide in half (fission) and grow back to former size if more are needed.
Composed of protein and RNA
"Protein Factories" protein is synthesized here
More abundant in the Rough ER (Endoplasmic Reticulum), but also some are free floating in the cytoplasm.
Receives molecules from the ER
Has membranous sacs called Cisternae
Refines packages and delivers the proteins synthesized by the ribosomes
Includes processing and packaging of lysosome enzymes
Endoplasmic Reticulum (ER)
Communicates with the cell membrane, nuclear envelope and certain organelles
Provides a tubular transport system for molecules throughout the cell
Smooth ER -
no ribosomes, has enzymes for both lipid and carb. synthesis.
Rough ER -
contains ribosomes, site of protein synthesis.
Material between cell membrane and Nucleus
Contains cytosol, 90% water, contains amino acids, simple sugars and other substances to manufacture larger molecules.
Contains thousands of enzymes
Site where most cellular activities occur (Metabolism). Site where food molecules are received, processed and used.