KAAP309 Lecture Notes - Lecture 4: Microscopy, Dermis, Goblet Cell
10 Apr 2018
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Add heavy metal to deflect electron beam. Stain sticks better to proteins (purple color) Specialized contacts on the sides: tight junctions, desmosomes. Supported by connective tissue: basal lamina (non cellular) and reticular connective tissue below. A high number of cancers develop from this tissue--doesn"t take a lot f genetic damage to dna. Part 2: shape of apical layer in stratified. Make and release hormones into blood, ductless, most are small organs, ch 16. Unicellular: goblet cell make mucin, forms mucus; resp and gi tract. Multicellular: duct and secretory unit (acinus); sweat, various in gi tract, mammary, salivary. Loose (lots of cells, not a lot of material) Areolar-- support, hold fluid, defense vs infection. Adipose-- cushion, store energy, insulate, often subq. Reticular-- like areolar but only retic fibers, bone marrow. Dense (fibrous-- fibers are main components, lots of material not a lot of cells) Irregular-- multidirectional collagen fibers, makes sheets, dermis, joint capsules, etc.
