Histology exam 1

What is Histology?

study of anatomy and physiology at the microscopic level

Cell membrane/plasma membrane function

Transport, recognition, cell to cell &cell to matrix adhesion

Two types of membrane proteins

Integral and peripheral

Protein functions (cell mem.)

Anchoring, recognition, catalyzers, receptors, carriers and channels

Carbohydrates

attach to proteins and make glycoproteins

form the cell coat (glycocalyx)

Simple diffusion

fat soluble and small uncharged molecules, down concentration gradient

Protein carrier

small water soluble molecules, protein goes under conformation change

which requires energy? active or passive transport (carried proteins)

active

Channel proteins

ion and small charged molecules, ion selective channels

Bullk transportation

Endocytosis and exocytosis

Pincocytosis

Fluids

Phagocytosis

Big particle, usually for removal and immune

Receptor-mediated endocytosis

internalize specific molecules by the binding of ligands to receptors on the cell surface.

Exocystosis

regulated or consituitive

Regulated exosytosis

Occurs in response to ligand binding to receptor

Cytoskeleton is formed by?

Intermidate filaments, microtubules, and actin filaments that provide structural support and shape to the cell.