Anatomy and Physiology I Study Guide II - Anatomy and...

This preview shows page 1 - 3 out of 10 pages.

Anatomy and Physiology IStudy Guide II1.Epithelia – do not go through mitosis; stem cells hat maturea.Characteristicsi.Cellularity (cell junctions): relationship of one cell to another; where they join = junctionii.Polarity (apical and basal surfaces) iii.Attachment (basal lamina) iv.Avascularity v.Regeneration (Epithelia are replace by the division of germinative cells (stem cells) near basal lamina) b.Functionsi.Provide physical protectionii.Control permeability iii.Provide sensationiv.Produce specialized secretions (glandular epithelium) c.Specializations of Epithelial Cellsi.Move fluids over the epithelium (protection) ii.Move fluids through the epithelium (permeability) iii.Produce secretions (protection and messengers) d.epithelial classes – based on shapes and layersi.Simple Epithelium - single layer of cellsii.Stratified Epithelium - several layers of cellsiii.Shapes: 1.Squamous Epithelia - flat shaped2.Cuboidal Epithelium - square shaped3.Columnar Epithelia - tall shapediv.Squamous Epithelia: 1.Simple Squamous Epithelium: absorption and diffusion a.Mesothelium: lines body cavitiesb.Endothelium: lines heart and blood vessels2.Stratified Squamous Epithelium: protects against attacksa.Keratin proteins add strength and water resistancev.Cuboidal Epithelia:1.Simple Cuboidal Epithelium: secretion and absorption a.Kidney tubules2.Stratified Cuboidal Epithelium: sweat and mammary ductsvi.Columnar Epithelia:1.Simple Columnar Epithelium: absorption and secretion2.Pseudostratified Columnar Epithelium: cilia movement
3.Stratified Columnar Epithelium: protection vii.Glandular Epithelium: Endocrine and Exocrine Glands1.Endocrine Glands: release hormones into interstitial fluid; no ducts2.Exocrine Glands: produce secretions onto epithelial surfaces; through ducts2. Modes of secretion: in relation to epithelia 1.Merocrine Secretiona.Are produced in Golgi apparatusb.Are released by vesicles (exocytosis) c.E.g. Sweat glands2.Apocrine Secretion (Top) a.Are produced in Golgi apparatusb.Are released by shedding cytoplasmc.E.g. mammary glands3.Holocrine Secretiona.Are released by cells bursting, killing gland cellsb.Gland cells replaced by stem cells c.E.g. sebaceous gland3. Connective tissue: connect 1 type of cell to another, should never see, not interaction with outside environment1.Function a.Connect epithelium to the rest of the body (basal lamina) b.Provide structure (bone) c.Store Energy (fat) d.Transport Materials (blood) e.Have no contact with environment2.Characteristicsa.Specialized cellsb.Solid extracellular protein fibersc.Fluid extracellular ground substance3.Classificationa.Connective Tissue Proper: connect and protecti.Components: 1.Fibers: (Ligaments: bone to bone; tendons: bone to muscle) a.Collagen Fibers: most common fibers in CTP, strong and flexible; resists force 1 direction, e.g., tendons and ligamentsb.Reticular Fibers: network of interwoven fibers (stroma), strong and flexible; resists force in many directions, e.g. sheaths in organs

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 10 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
N/A
Tags

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture