2017 BIO 3303 Lecture 13 Photoreception Notes.pptx -...

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AnnouncementsMidterm #1 will be handed back at the end of classPlease read over your exam carefullyCross reference the grading schemeIf you have questions about your grade please write a clear, grammatically correct submission before Friday March 3rdInclude the question of concern and how you feel you have answered the question relative to the keyAttach your submission to me as a pdf with an email subject line of BIO3303 Midterm#1I will read each submission and pass the reasonable requests onto the TA who graded the papers for assessmentIf your request is not fully explained it will not be passed alongGrade changes will not be considered after Friday March 3rdBIO 3303
Example of an appropriate submissionJones Midterm#1 submission request.pdfQuestion #6. List Your Full Response:Mosquitos have mutations that allow them to resist the toxic effects of the insecticide. One trade off for this resistance is that these mosquitos are less tolerant of temperature changes in their environment. So mosquitos that have the mutation will be out competed in a non- toxic environment that changes temperature relative to mosquitoes that do not have the mutation. Depending on the environment, adaptive selection will act on the mosquito with the advantage.Answer Key matched with response: (answer must be exactly what is on your exam)Individuals with mutations conferring resistance to neurotoxic insecticides survive and reproduce. (1 mark) Mosquitos have mutations that allow them to resist the toxic effects of the insecticide.Individuals with the mutation are less resistant to temperature changes. (1 mark) One trade off for this resistance is that these mosquitos are less tolerant of temperature changes in their environment.If pesticide is no longer used, and temperatures shift, the mutations would be selected against. (1 mark) So mosquitos that have the mutation will be out competed in a non-toxic environment that changes temperature relative to mosquitoes that do not have the mutation. Depending on the environment adaptive selection will act on the mosquito with the advantage.
AnnouncementsNo office hours Thursday March 2ndBIO 3303
AnnouncementsExam TeaserName three types of proprioceptors, where they are located and how they measure body position.BIO 3303
Last Lecture HighlightsMechanoreceptor ion channels are attached to extracellular matrix proteins and to the cytoskeletonThere are many types of mechanoreceptors and two types of mechanorecpetor proteinsTouch and pressureBaroreceptors, tactile receptors and proprioceptorsEquilibrium and hearingInvertebrates have statocyctsVertebrates have hair cellsSome aquatic animals have electroreceptionThe vertebrate earSemi-circular canals involved with equilibriumCochlea senses involved with hearing
Touch and pressureFig. 6.13/7.15Tactile receptors(vertebrates)Detect touch, pressure, vibration on the bodyFree nerve endings (Tonic)

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