-
Plasma Membranes are sheet-like structures composed primarily of ______ & ____ held together by_________ interactions
- phospholipids & protein
- noncovelently
-
Core of phospholipid bilayer is
hydrophobic
-
Phospholipids are comprised mostly of
- phosphoglycerides & phosphingolipids
- cholesterol also found (offers structural integrity)
-
Membrane _____ give membranes their functions
proteins
-
Membranes are or are not structurally distinct from the aqueous compartments of the cell they surround.
are not
-
They hydrocarbon side chain of the cholesterol molecule associates with the hydrocarbon fatty acid tails of the phospholipids, creating a ___region
hydrophobic
-
The hydroxyl groups of the cholesterol are positioned close to the polar head groups of the phospholipid molecules, resulting in a more _______
hydrophilic region.
-
layer of carbohydrates on the cell's outer surface is called ----
Glycocalyx
-
The membrane glycoproteins are crucial to the life of the cell, serving as: the receptors for hormones, certain nutrients, and other various substances that:
regulate the intracellualr communication necessary for cell growth and tissue formation.
-
_______proteins are embedded in hydrophobic membrane (receptor/carrier)
Integral
-
______proteins are associated with membranes through ionic interactions and are located on or near the membrane surface. (glycoproteins of the cell recognition complex.
Peripheral
-
Cytoskeleton components
Microtubules, Microfilaments, intermediate filaments
-
Hollow, tubular, made up of 2 types of globular tubulin subunits, provides mechanical support
Microtubules
-
made up of globular subunits of (protein) actin. Subunits have electrical charge. Can be (dis)or assembled.
Microfilaments
-
unbranched, provide mechanical strength to cells, not made of protein, chemically heterogeneous (dis) and assembly controlled by (de) or phosphorylation.
Intermediate filaments
-
all metabolic pathways occurring in the cytoplasmic matrix are influenced by its ____
structural arrangement
|
|
