<prompt> internalization of material and subsequent lysosomal digestion:PinocytosisPhagocytosisReceptor mediated endocytosisExocytosis  <response>: Active transportMovement across a membrane from an area of low concentration to high concentration.Since carriers are involved, it demonstrates MichaelisMenten kinetics.It is a unidirectional transport that requires energy ATP.a. Endocytosisvacuole formation utilizing plasma membrane and released inside the cell.May result in degradation.If vacuole is fused with lysozymes, results in degradation.1 Pinocytosisinternalization of interstitial fluid.2 Phagocytosisinternalization of material and subsequent lysosomal digestion.3 Receptor mediated endocytosisselective internalization of receptorligand complex. Receptor complex may return to surface.b. Exocytosissecretory vesicle membrane from within the cell fuses with the plasma membrane, and the contents of the vesicle are released outside the cell.c. Primary active transportenergy derived from ATP.Specific carriers are utilized, which are saturable.1 Ca2-ATPase pumps are important active transports in sarcoplasmic reticulum membranes.2 NaK-ATPase pump is present in all plasma membranes.- Establishes and maintains a Na and K gradient by transporting Na out and K into the cell.- The Na concentration gradient is the force for secondary active transport mechanisms.d. Secondary active transportATP establishes an ionic gradient, which is the driving force secondary transport.1 Na gradient established by membrane pumps drive this system.2 Protein carriers bind both the substance transported and Na.3 Cotransport systemsNa and substance transported move in the same direction.Examples include:- Glucose and galactose across GI mucosa and resorption in renal tubule.- Amino acid transport in GI mucosa and renal tubules.4 Countertransport- Na and transported substance move in opposite directions.Examples include:- NaH exchange H out and Na into cells.- NaCa2 exchange Ca2 out and Na into cells 