Cell Flashcards
Cell classification. Known to reproduce only when necessary. (e.g. Liver)
Quiescent/Stable cells
Cell classification. Known for continuous reproduction. (e.g. Skin)
Labile cell
Cell classification. Can no longer reproduce once matured. (e.g. Neurons)
Permanent cells
Substance that makes up the entire cell
Protoplasm
Components of the protoplasm + their percentages
Water: 70-80% Proteins: 10-20% Lipids: 2% Ions Carbohydrates
2 types of proteins in the protoplasm + 1 example of each
Structural: cytoskeleton
Globular: enzymes
Contains DNA, Histones, & chromosomes. Has a nucleolus
Nucleus
Powerhouse of the cell
Mitochondria
Involved in detoxification, lipid synthesis
Smooth(agranular) endoplasmic reticulum
Synthesizes proteins bound for the cell membrane, lysosomes, and out of the cells
Rough endoplasmic reticulum ribosomes
For packaging, molecular tagging, and synthesis of hyaluronic acid and chomdroitin sulfate
Golgi apparatus
Molecular tag for lysosomes bound substances
Mannose-6-phosphate
Contains proenzymes, neurotransmitters, and replenishes the cell membrane components
Secretory vesicles
For regression of tissues and autolysis.
Lysosomes
For synthesis of proteins bound for the cytoplasm and mitochondria
Free floating ribosomes
Degrades membrane associated proteins; not membrane bound.
Proteosomes
Contains oxidases, catalases; for detoxification
Peroxisomes
Function of the nucleolus
Site of transcription and processing of rRNA
Unique points about the mitochondria
Mitochondrial DNA does not follow the genetic code
Mitochondrial DNA is maternally derived
Has it’s own exclusive biochemical pathways: beta oxidation, Krebs cycle
The RER and SER are abundant on which organ?
Liver
What are the subunits of eukaryotic ribosomes
40s, 60s
80s
What are the subunits of prokaryotic ribosomes
30s, 50s
70s
Specialized SER in the skeletal muscle
Sarcoplasmic reticulum
Specialized RER in the neuron
Nissl substance
Only substance modified in the RER and not the Golgi apparatus
Collagen
Formula for collagen
Glycine-x-y
X: hydroxy
Y: proline/lysine
Adds an OH to proline/lysine
Vitamin c
Lysosomes come from which organelles
Golgi apparatus
Peroxisimes come from which organelles
SER
Wear and tear pigment that accumulates in lysosomes
Lipofuscin
Microvilli Locomotion of macrophages Muscle Zonula adherens Zonula occludens
Actin/ microfilaments
Keratin
Neurofilaments
Desmosomes
Hemidesmosomes
Intermediate filaments
Flagella
Cilia
Centrioles
Mitotic spindle
Microtubules