Class Notes (839,246)
Canada (511,223)
Health (501)
HLTH 201 (10)
Lecture

Course Notes Various Lecture Material notes taken throughout the semester

18 Pages
134 Views

Department
Health
Course Code
HLTH 201
Professor
Nancy Pearce

This preview shows pages 1,2,3,4. Sign up to view the full 18 pages of the document.
Description
Biological& PhysicalAging TwoMajorSchoolsofThought Random Programmed September-16-08 5:57 PM Slide1 Random primarilyenvironmentalfactors,freeradicaltheory,reactingwithbody'scells Slide2 causingchaos!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! causingcelldamage,damageDNA,enhanceaging Lifeexpectancy Reversalslightlywithantioxidants howlongapersonisexpectedtolivegivennochangeinthemortalityrate Couldbeincreaseinfreeradicalsordecreaseinantioxidants Postage65 Programmed Men78 women82.7 overall80.4 LeonardTheory Lifespan Telomereshortenstoapointwhereacellcan no longerdivide Thenumberofyearsaspeciesareexpectedtolivegivenoptimalconditions Humanshavelifespanof115-120 Healthexpectancy Numberofyearsexpectedtolivediseasefree HowdowelivelongandProsper Morbidity:disease/disability Mortality:death Animalmodels Doesnotalwaysfollowhumancharacteristics HowDoesAgingHappen Longitudinalstudies LonggggggggggandPriceyyyyyyyy$$$$$$$$$$$$$$ Alimittothenumberoftimesacellcan divide,Leonardtime Cohortstudy Groupwithsimilarcharacteristics,centenarians,they'velivedalongtime,specific factorthat allowedthemtoliveforaperiodoftimegreaterthantheexpected SelectiveSurvivalTheory Someareparticularlyresistanttodisease Caloricrestriction Relativelyfreeofinfirmities Hasnot yetbeenproveninhumans,cannotrecreateinalabenvironment Theircohorthavealreadydied,naturalselection,thusfreeofdisease Difficulttomaintainsuchadiet,qualityoflifedecreases,can'tenjoylife Opportunitycostyummyfoodversuslife...hmmm Crossover HumanGrowthHormone Whilewomenoutlivemen,menareinbetterhealth(80+),naturalselection,moreapparentinolder Illegal,nastysideeffects,noevidenceofits"benefits" olds Takenadvantageof,multimilliondollarbusinessonline OldestOld Healthy/robust,fittestofthefist Bettergenes,fewernegativelyaffectinggenes,hereditarytoanextent,longevitygene Adaptiveability,cancopewithstressfulsituations,powerfulphysicalandmentalreserve Moderatelifestyles, IntegumentarySystem Tobe classifiedasa resultof aging... Larges,mostvisiblebodysystem 1. Universal Skin,sweatglands,hairfollicles,touchreceptors,subcutaneouslayerof a. Hasto occurto everyone(mostly)inthespecies adiposetissue 2. Intrinsic Providesprotection Homeostasis,olderadultsaremoreimmunetofeversandcolds a. Hasto bethe resultofagingand genetics,changeswithinthebody Agerelatedchanges b. Notanenvironmentalfactor 3. Progressive Skinthins,cutseasier,bruising,loosens a. Progressivelygreyer,morewrinkled,changesovertime Hair,nails,subcutaneousfat 4. Irreversible Externalinfluences Suntanning,smoking a. Cannotbechangedtopriorstatus 5. Deleterious a. Harmfultooneself MusculoskeletalSystem Protectbodyfrominjury Supportbody Enablemovement,balance,dailyactivities ComplexityofPhysiologicalAging Agerelatedchanges Differentratesdependingontheindividual Lossofheight,lossofmusclemassandstrength,bodyfatincreasesasmuscle Affectsdifferentaspectsofthebodyatdifferenttimes,organs,systems,functions massdecreases,reductioninbonemass,decreaseinjointflexibility Influencedbydiseaseandextrinsicfactors Exercisehasbeenproventoreversetheaging process I.e.Canbeworsenedbypoorhealth SensorySystem Vision,hearing,balance,equilibrium,tasteandsmell Lensbecomeslesselastic, difficultseeingup-close(presbyopia) Lensthickens,clouds,lesslightin, decreaseinacuity,clarity,nightvision Corneathickensandislesstransparent glaremoreofaproblem Decreaseinpupilsize Moreilluminationandtimetoadjusttolightchange Tasklightingiscrucial,welllitareas,opposingthenotionofenergysaving,seniors requiremorelightingtopreventaccidents Impactsindependence,drivingabilities,stopdrivingatnights Presbycusis Affectscochlea,partthatreceivesandtransmitsauditoryinfo Noticeablewithhighfrequency,can'thearwivesanymore Debatable:saidtobebecauseofnoisedamageoraging Accumulationofearwax,arthritisinbonesofmiddleyear Messesupbalanceandequilibrium,dizziness,lightheadedness,vertigo, hypertension,bloodrushingwhenchangingposture Cardiorespiratory Decreasesinefficiencyandvitalcapacity Lymphaticandimmune
More Less
Unlock Document

Only pages 1,2,3,4 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit