10/8/14&1&1&Animal&Form&&and&Func3on:&&Homeostasis&and&Thermoregula3on&Lesson&20&::&BIOL&1108&::&8&October&2014&Unit:&Animal&Form&and&Func3on&Today ’s&Topic:&Homeostasis&&&Thermoregula3on&Today’s&learning&objec3ves:&• Prac3ce&observing&animal&FORM&and&rela3ng&it&to&FUNCTION&&• Be&able&to&define&homeostasis&• Be&able&to&draw&a&generalized&homeosta3c&feedback&diagram&and&understand&its&terminology&&• Understand&two&evolu3onary&“strategies”&animals&have&for&thermoregula3on&• Consider&organisms’&physiological,&morphological,&and&behavioral&adapta3ons&for&thermoregula3ng&within&their&environments&&2&10/8/14&2&3&4&10/8/14&3&5&Animal&Form&and&Func3on:&&Homeostasis&and&Thermoregula3on&TINY&HOUSES&6&10/8/14&4&What%do%you%need%to%%regulate%temperature%%in%a%one%room%house?%7&Set%Point:%Integra8on%Center%+/<%?%%Sensory%Signal%Effector%CV:%Disturbance%(environment)%%Sensor%CC:%Sensory%%Signal%START&HERE!&&What&do&you&want&to&control?&8&70ºF87ºFThermometerThermostat87ºF > 70ºFAC unitHot dayCool room temp10/8/14&5&Set&Point&Integra3on&Center&+/a&?&Generate&error&signal&Sensory&Signal&Effector&Controlling&Variable&(CV)&Disturbance&(environment)&&Sensor&Controlling&Condi3on&(CC)&Sensory&&Signal&START&HERE!&&What&do&you&want&to&control?&What&is&the&¤t&condi3on?&IF&there&is&a&difference&=&generate&error&signal&Compares&sensor&and&set&point&Structure&that&can&make&a&difference&to&&controlled&condi3on&What&should&the&condi3on&be?&What&the&effector&does&CV&will&change&CC&in&the&right&direc3on&&Nega3ve&feedback&9&Define:&HOMEOSTASIS&10&DampensReturns to normalOn/OffThe ability to maintain a (+/-) stable environment, independent of the (+/-) external environment.10/8/14&6&Willow&ptarmigan&Fluctua8on%is%an%indica8on%%of%regula8on%11&A.&A&process&whereby&a&change&in&a&ini3al&condi3on&triggers&a&response&that&counteracts&the&ini3al&change.&B.&A&process&whereby&a&change&in&an&ini3al&condi3on&triggers&a&response&that&reinforces&or&lifies&the&change.&How%would%you%define%a%nega8ve%feedback%loop?%12&10/8/14&7&Unit:&Animal&Form&and&Func3on&Thermoregula3on:&Heat&gain&and&loss&13&Animal&Form&and&Func3on:&Thermoregula3on&Abio3c&Factor:&Temperature&visibleearth.nasa.gov&14&EvaporationConvectionConductionRadiation10/8/14&8&Animal&Form&and&Func3on:&Thermoregula3on&Abio3c&Factors&www.wallpaper77.com&15&Animal&Form&and&Func3on:&Thermoregula3on&Bio3c&16&Endotherm:(Internal)-Metabolism-Organisms regulating heat themselvesEctotherm:(external)heat source from something other than themselvesTemperatureTextStream temp (convection), elevation, sunlight, shade, the sides of the mt (shade or sun)10/8/14&9&Consider&heat&gain/loss&and&environmental&interac3on&rela3ve&to:&organisms’&physiological,&morphological,&and&behavioral&adapta3ons&&&Class&Diagram&Ac3vity&17&18&Animal&Form&and&Func3on:&Thermoregula3on&&Class&Diagram&Ac3vity&Radiation (sun):- Move to shade or sun (behavior)- elevation (amount radiation)Swimming (organisms from land):Exotherms:- Blood vessels closer to suraceAs you are walking across campus during the midday of summer, receptors in your skin register that your core body temperature has varied from its normal range (36.5 – 37.5 C°). This change in temperature is registered in your brain (the master gland), which then secretes a hormone that causes you to sweat out of pores in your skin. Using this scenario, fill out the homeostatic feedback diagram provided.10/8/14&10&Set%Point:%Integra8on%Center%+/<%?%%Sensory%Signal%Effector%CV:%Disturbance%(environment)%%Sensor%CC:%Sensory%%Signal%START&HERE!&&What&do&you&want&to&control?&19&Animal&Form&and&Func3on:&&Homeostasis&and&Thermoregula3on&Today ’s&learning&objec3ves:&• Prac3ce&observing&animal&FORM&and&rela3ng&it&to&FUNCTION&&• Be&able&to&define&homeostasis&• Be&able&to&draw&a&general ized&homeosta3c&feedback&diagram&and&understand&its&terminology&&• Understand&two&evolu3onary&“strategies”&animals&have&for&thermoregula3on&• Consider&organisms’&physiological,&morphological,&and&behavioral&adapta3ons&for&thermoregula3ng&within&their&environments&Think&about:&Burmese&python&ques3on&(next&slide).&20&Hot sunny daySkin receptors39ºC37ºCHypothalamus39ºC > 37ºCSweat Glands (evaporation)lowered body tempHormonesInternal body
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