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UT KIN 324K - Lab

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Slide 1Today’s AgendaMy Info !ExpectationsMore ExpectationsEven More ExpectationsTerminologyTerminologyTerminologyCheck Point #1!TissuesTissue TypesMore TissueCell TypesCheck Point #2Slide 16Slide 17SkinBad Skin Gets Little CareKeratinocytes & MelanocytesLayers of the DermisSlide 22Slide 23Lab 1Intro, Planes, Terminology, and Connective TissueAshlyn Brown09/08/14 - 09/12/14Today’s AgendaIntroductionExpectationsTerminologyTissuesCell TypesSkinClinical ApplicationsGroup WorkQuizMy Info !Ashlyn BrownEmail: [email protected]Office Hours: 12:30 – 2PM Tuesdays & 1:30 – 3 Wednesdays in BEL 327ESorry….no meetings by appointment :/ExpectationsQuizzes2 quizzesOne at the beginning from lab manual (don’t be late!)One at the end from “pool questions”Muscle Cards30 Cards total10 each due for the next three labsPresentationsBegin thinking of groups and topicsBy the 3rd week (week of 9/22) you should have groups chosenTopics must be turned into me by the week of 10/1310-15 min. long presentationGroups of 5-6 personsMore ExpectationsAttendanceExcused absences require an official reason/advanced noticeUnexcused absencesAttending other lab sections w/o prior approvalLeaving lab early w/o permissionStudents will be dropped from class with an “F” after the 3rd absenceEven More ExpectationsGradingLab Practicals (2) x 100 pts each = 200 ptsQuizzes (8) x 10 points each = 80 ptsPresentations x 15 points = 15 ptsMuscle flashcards x 5 points = 5 pts Total = 300 pointsTerminologyTerminologyTerminologyCheck Point #1!Your mouth is __________ to your eyes. What plane causes this? _________Your wrist is ________ to your shoulderThe reticular layer of the dermis is ___________ to the papillary layer of the dermisYour nose is ________ to your butt. What plane causes this?______________Your tibia is ______to your fibula.inferiordistaldeepanteriortransverseCoronal/ frontalmedialTissuesTissue TypesEpithelialCells bound closely by cell junctions (for diffusion)Little extracellular tissue in betweenPolarityAvascularCan be regeneratedConnectiveAll CT arises from mesenchymeRange of vascularityComposed of large amounts of extracellular matrix rather than tightly joined cellsMore TissueMuscleVascularInnervatedContains contractile proteins that allow movementNervousGenerates and conducts electrical impulsesGenerally incapable of dividing/ regeneratingCell TypesCheck Point #2In groups of 3 to 4, tell me everything you know about your given cell type: simple epithelium, stratified epithelium, glandular epithelium, loose areolar CT and adipose tissue, dense irregular and regular CT, or cartilageSkinBad Skin Gets Little Care•Stratum Basale- a single layer of columnar germinating cells. The germinating cells divide and the daughter cells get pushed up to form more superficial layers•Stratum Spinosum- a layer of ovular, flat cells with short spines•Stratum Granulosum- 3-5 cell layers thick of granules containing keratohyalin•Stratum Lucidium-a few layers of dead cells that are flattened, bright, and clear. Only seen in thick skin•Stratum Corneum-the most superficial layer that consists of 20-30 layers of flattened cells. These consist of dead keratinocytes and protect against abrasion. Responsible for differences in skin thicknessKeratinocytes & Melanocytes•Takes ~35-40 days for keratinocytes to move from the Basale layer to the Corneum layer and shed.•Melanocytes are only found in the basale layer and don’t arise from the germinating keratinocytes•20 keratinocytes:1 melanocyte in basale layer•Melanocytes secrete melanin pigment into the lower epidermal layers and hair folliclesClick icon to add pictureLayers of the DermisPapillary layer20% of the dermis- thin arrangements of collagen fibersSupplies epidermis with nutrients and oxygenThe border between the dermis and epidermis contains papillae which increase SAFree nerve endings and the Meissener’s Corpuscles are found here and sense pain and light touchesReticular layer80%of the dermis- thick arrangements of collagen fibers (dense irregular)Responsible for creating lines of cleavageContains Pascinian Corpuscles which sense deep, constant touch & pressureClinical


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UT KIN 324K - Lab

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