Cells Flashcards
Function of plasma membrane
Boundary of the cell. Involved in membrane transport
Structure of plasma membrane
Bilayer of phospholipids, glycolipids, and glycoproteins
Structure of microvilli
Numerous tiny folds containing microfilaments
Function of microvilli
Allow greater surface area for absorption
Structure of Cilia
Part of the plasma membrane; numerous short extensions containing microtubules.
Function of Cilia
Move substances such as mucus
Structure of Flagellum
Part of plasma membrane; long extension of sperm cell containing microtubules.
Function of flagellum
Moves sperm
Structure of nucleus
Large structure in middle of cell
Function of nucleus
Center of cellular control
Structure of nuclear envelope
Double membrane boundary of nucleus with pores; blends with rough RER
Function of nuclear envelope
Passageway between nucleus and cytoplasm
Structure of nucleolus
No membrane. Contains ribosomal RNA and protein. In center of nucleus
Function of nucleolus
Forms the ribosomes
Structure of chromatin
Strands of DNA and protein; looks like squiggly lines INSIDE of nucleus
Function of chromatin
DNA Represents genetic control for protein synthesis
Structure of Cytoplasm
Contents between plasma membrane and nucleus containing cytosol fluid and organelles
Function of cytoplasm
Location of numerous cellular processes
Structure of membrane bound organelles
Organelles possessing a membrane covering
Function of membrane-bound organelle
Various functions depending on organelle
Structure of Rough Endoplasmic Reticulum (RER)
Extensive membrane network with attached ribosomes
Function of RER
Site of protein synthesis with ribosomes; cellular transport
Structure of smooth endoplasmic reticulum
Extensive membrane network lacking ribosomes
Function of SER
Site of lipid synthesis; cellular transport
Structure of mitochondria
Possess double membrane with folded inner membrane. (Look like beans)
Function of mitochondria
Referred to as powerhouse of cell because they contain the most energy. Synthesis of ATP (adenosine triphosphate)
Structure of Golgi apparatus (complex)
Often near nucleus; series of bunches up flattened sacs
Function of Golgi apparatus
Packaging site of glycoproteins for transport and secretion
Structure of vesicles
Membranous sacs containing various substances
Function of vesicles
Store or transport cellular substances
Structure of lysosomes
Sacs containing digestive (eating) enzymes
Function of lysosome
Sites that destroy (eat) cellular debris and worn-out organelles.
Structure of peroxisomes
Small sacs containing oxidative enzymes; abundant in liver and kidney cells. Smaller than lysosome
Function of peroxisomes
Detoxify harmful cellular substances
Structure of ribosomes
Contain ribosomal RNA and protein; attached to rough ER or free roaming in cytoplasm
Function of ribosomes
Sites of protein synthesis
Structure of Centrosome
Area near nucleus containing a pair of centrioles
Function of centrosome
Formation center to produce microtubules and spindle fibers for cell division
Structure of Cytoskeleton: Microtubules
Hollow cylinders of proteins in cilia, flagella, and centrioles
Function of cytoskeleton microtubules
Involved with support and movement within cell
Structure of Cytoskeleton: Intermediate filaments
Various protein fibers
Function of Cytoskeleton: Intermediate Filaments
Provides support and shape for cell
Structure of Cytoskeleton: microfilaments
Fine threads of a protein
Function of Cytoskeleton: microfilaments
Aids in maintenance and changing of cell shape; aids in muscle contractions.