Cell Flashcards
(98 cards)
Eukaryotic cells are composed of 3 main parts
Plasma membrane
Cytoplasm
Nucleus
Forms the cell’s outer boundary and separates the cell’s internal environment from the outside
Plasma membrane
Contains all the cellular contents between the plasma membrane and the nucleus
Cytoplasm
Large organelle that contains DNA molecules called chromosomes
Nucleus
Subcellular structures embedded in the cytosol
Organelles
“A phospholipid bilayer with associated integral and peripheral proteins”
Plasma membrane
They resemble a sea of phospholipids with protein “icebergs” floating in it
Fluid mosaic model
Form a lipid bilayer - choloesterol and glycolipids (sugar-lipids) also contribute
Phospholipids
Extend into or go completely through the bilayer
Integral proteins
Attach to the inner or outer surface but do not extend through the membrane
Peripheral proteins
Membrane proteins with a carbohydrate group attached that protrude into the extracellular fluid
Glycoproteins
Membrane lipids with a carbohydrate group attached
Glycolipids
The lipid bilayer consist of
Phospholipids
Cholesterol
Glycolipids
Allow specific ion to move through water-filled pore
Ion channels
Carries specific substances across membrane by changing shape
Carriers
Recognize specific ligand and alters cell’s function in some way
Receptor
Catalyzes reaction inside or outside cell
Enzymes
Anchors filaments inside and outside the plasma membrane, providing structural stability and shape for the cell
Linkers
Distinguishes cells from anyone else’s
Cell identity markers
“Sugary coating” surrounding the membrane
Glycocalyx
Differences of attributes in one place vs a different place
Gradients
The attribute is concentration of a chemical
Concentration gradient
Attribute is electrical charges
Electrical gradient
Combined both concentration / electrical gradient
Electrochemical gradient