Week 2 Lecture on Protists PDF

week 2 lecture Protists consists of single celled organisms Anything Organisms that resembafune.fi Eukaryotic Multicellular Resemble plants  extend 6 5 YE of the cell that are used eff...

week 2 lecture Protists consists of single celled organisms Anything Organisms that resembafune.fi Eukaryotic Multicellular Resemble plants  extend 6 5 YE of the cell that are used effects Made up of microtubules same hard structure cytoskeleton can be bundledtogether May have one several or be completely covered like extensions of the plasma membrane that can be found all over certain cells can wave in sync to little current create a Pseudopodia Hydrostatic movement I Fak Ft Extensions of the cell that are made by channeling water w in a cell pressing against the cytoskeleton hence hydrostatic using pressure created by the movement of waterto extend part of the cell membra only happens in organisms w out cell walls when the all makes an extension of itself that can grab onto something a pull the cell Locomotion cont going with the flow Fixed in place sessile safety is in deal w on f changing Move to more favorable circumstances if they can move how do you decide where Phototaxis movement and response to light Toward the light or away in response to chemical gradient cnet.EE i i Eiea es a anatomme Thigmotaxis movement in response to touch  Plasmodial slime mold Plasmodium is a giant single cell of bte of nucleui Macroscopic can see it w the naked eye Slimy shares characteristics w fungi missing internal membrane Tends to the on deadthings Are motile by Pseudopods extensions of their body Are chemotactic can extend pseudopods into their environment that will then collect information about the chemicals that are present and will move towards oraway from these chemicals Forms resting state in poor condition low energy resting state is called sclerotinum They display complex decision making Make decisions about which chemicals to move toward or can make feeding decisions based on quality away quantity Remember where they've been Find optimal pathways to food  how it water aroundpump A large single celled organism From Has cillia hair like progentions SUPERGroup Alveolates can wave those to move around also lines the oval groove a groove in the cells surface that has a pore Fbottom called the atmosth thats how it takes in food Hetertrophic needs to bring in food from outside Main area of interest Easy to see cellular compartments Paramecium are not pathogenic but most protists are the more you understand the biology of an o anism the more you can understand how it will relate to other organisms and to humans in a medical context FROM SUPERGROUP Excavates Flagellated long tail that sticks of the cell for moving around Are unicellular and they live in water pond water They are very green full of chloroplasts because they are needs suffer that form of metabolism Can be heterotrophs but if they are close to light or in good conditions they can produce their own food using chloroplasts can switch between autotrophic heterotrophic hat facultative means  wmk TRI CHONYM PHA super group Excavates Most prominent feature Many flage Hae Are notice swim around using flagella Unicellular Are Endosymbionts of Termites Foramsmthat lives inside another organism in a mutually beneficial relationship Trichonympha live inside termite digestive tracts be they produce these enzymes called cellulars that breaks down a component in wood called cellulose Do not have mitochondria They have other endosymbionts that produce cellulose Many family members cause human disease  Fucus supergroup Strameno piles Sessile fixed to their growing area Dont move Multicellular Brown algae called kelp but is not a plant because doesnt have the same features Has multicellular specialization Fronds leaves stipe stem Holdfast roots Grow in shallow photosynthetic marine areas are dense kelp forest that provide habits for organisms Used as an emulsifier dietary supplement for heart Male female conceptacles when the gametes are made  in fucus fffamter Female Male gamete Moffat gametes motile win 5 one plant produces both male female gameter but grow in separate chambers Disease human revelance Produce products important for humans for food industry or dietary supplements Be able to treat disease which you dont want Kelp is a keystone species Everything in the kelp forest depends on kep in some way trees in hides eats Chemoheterotrophe need to eat Saprobic grow on dead things Pastasitic grow on live things common name Watermold grows in water toke mold body is a mass of cell wide filament called hyphae a fungal term Also are coenocytic missing internal cell membranes like Physarum Like Fucus produces male female gametes Genus members cause plant animal diseases Cotton wool disease in fish grows on scales can be devasting to comenice fisheries Related to the organism that caused late blight which caused the Irish potato famine Foraminifera Supergroup Rhizaria Moves around via Pseudopods Chewsheterotrophic Marine They are bio mineralized Feathers or Is sidelined support Foraminifera only uses one Ca 03 calciumcarbonate It uses Caco to build shells called tests acts is the mineral that makes up the store can create deep sea limestone deposits There are holes in the tests for pseudopods to extend for eating movement Diatoms Supergroup Stramens piles Photo autotrophs photosynthetic Unicellular can live in freshwater or marine environments Are biominerained r Make tests made of Si 02 silicon dioxide same substance glass is made of Used to make diatomaceous earth powdered diatomfossils Powdered diatom fossils An subbing agent or toothpaste infffide ages can hurt