Chapter Ten 

The surface nation

While it’s developed by our standards Plas is considered the third world

selective permeability - these processes can be passive or active

The ability to differentiate between different types of molecules, only allowing some molecules through while blocking others

endocytosis

Endocytosis is a cellular process in which substances are brought into the cell

or exocytosis

 a process for moving large molecules out of the cell to the cell exterior

There are steps to this:

Vesicle trafficking

initiates from vesicle formation via membrane budding,

Membrane budding is a key step in vesicular transport, multivesicular body and exosome biogenesis

biogenesis is the development of life from preexisting life

followed by vesicle transport among intracellular organelles,

ferrying material from one organelle to another or between regions of the same organelle

and is accomplished by vesicle fusion with the target membrane

the merging of a vesicle with other vesicles or a part of a cell membrane

The receptors (aka complex proteins) on the surface assist in cell recognition/binding and other intracellular processes

receptors on the cell surface of one cell bind to glycoproteins

 a large and diverse group of proteins to which one or more sugar molecules have been attached through covalent bonding

the mutual sharing of one or more pairs of electrons between two atoms

on the cell surface of another cell, allowing the two cells to communicate

Cell signaling

The process by which a cell responds to substances outside the cell through signaling molecules found on the surface of and inside the cell

Cell recognition

identify cells as either self or non-self with their specific tertiary structure

Cell adhesion

the ability of a single cell to stick to another cell or an extracellular matrix

Parts of the plasma membrane include Phospholipids that form the bilayer;

 a membrane with two molecular layers

integral proteins form transporters;

Which exist permanently within and span the membrane across which they transport substances

peripheral proteins are part of the cell's recognition sites

 a protein that is found temporarily attached to the cell