histology1

• Group(s) of cell types and intercellular material that act
• together to perform specific function (muscle, nerve)

Aggregate of cells/tissues held together by intra and intercellular support structures (kidney, heart, GI tract)

2/3 of total body fluid

carbohyrdates, proteins, lipids, amino acids

Cell membrane/metabolism

• Interstitial - surrounds cells but does not circulate (3/4 ECF)
• plasma - extracellular component of blood, circulates (1/4 ECF)
• transcellular - fluid outside of normal compartments (CSF, synovial fluid, mucus, digestive juices)

cell membrane has increased viscosity. This allows the cell to control it's movement through increased rigidity or fluidity of membrane

• philic: proteins, glucose, ions, urea
• phobic: CO₂, O₂, lipids, alcohol

physical isolation, immunospecificity, selective permeability, structural support

Spanning the lipid bilayer, in integral protein can allow hydrophilic molecules to diffuse, can actively transport molecules, and can receive messages from enzymes/ligands

usually residing on the cytoplasmic side of the cell near transmembrane proteins, the peripheral protein activates a process on the inside of the cell when ligand activates transmembrane protein

• Serves as recognition factor in immunospecificity
• Attachment sites for other cells and to ECM
• some negatively charged to reflect other negative ions
• receptors for binding hormones

endoplasmic reticulum. Also contains genes that control production of cellular proteins

It contains guarded pores where double membrane fuses. It contains heterochromatin (inactive) and euchromatin (active) DNA strands. Contains a nucleoli (accumulation of Ribosomes and RNA ready to be translated)

complex of flat and vesicular membrane bound structures. Functions to manufacture proteins from RNA pouring from nucleus. Rough ER - ribosomes (produces new protein for cell/for secretion), smooth ER - no ribosomes. (steroid production, detoxification, membrane upkeep, calcium storage)

Receives packaged materials from ER for final processing/secretion (cell packaging center)