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Melanie Barrera Amoeba Sisters Cell Transport

Simple diffusion is passive transport where molecules move with the concentration gradient through the cell membrane, like oxygen and carbon dioxide, to maintain homeostasis.

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    AMOEBA SGTER5: VIDEO RECAP CELLTRANSPORT Amoeba Sisters Video Recap: Ceii Transport 2. What is simple diffusion ? ' ■ In.; i-- ! i l i i ' . ■ i : d ► ; • ■ . 1 , / ■■ III-' ‘ . I l f . • iTiUVL-Ja ol-.g a . u r i c i -.IrdtlO'i g r a d l f l i t a Sulu’ On Of tffcross a semfpwnTRabl* 1 rrierribrane If if ? mr.ler I I I ' ' il ■■ 'ILL-I'i l.'H : ■ - I p l i - i l l V . i S i g i i . I cell T< Tibr,T- - ■ b e t v . - - I . e l a v - r s ir. Ihe mierrtbrane The cell membrane is important for maintaining homeostasis, because it controls what enters and leaves a cell. 1. Sketch the phospholipid bilayer of a cell memorane below and label the polar heads and nonpolar tails. 3. Circle th e statements below that wouId be TRUE a bout simple diffusion. HINT: There is more than one! It is a form of passive transport. (5J Molecules travel with the concentration gradient. C) It is how glucotse travels across the cell membra r.e. It is how oxygen and carbon dioxide travel across the membrane. E| This transport is typical for large molecules. Moving with the Concentration Gradient 4. "Moving with the flow" [i.e. going with the concentration gradient) is the direction of flow in passive transport. Show this in the diagram on right by drawing in 10 total circles (to represent molecules) . You must decide a certain amount to place on the left vs. the right side after viewing the arrow indicating the direction of movement. Label th concentration side and low concentration side. Low C o n c w l r a i w Higti Concent ration Endocytosis and Exocytosis 5. Are endocytosis and exocytosis forms of passive or active transport? ■ ; ~ ,|, ,r 6. Give a scenario where a cel may need to perform a form, of endocytosls. • : . ■ I : rr ■ ■ - ' ■■ , d*peridlng or> how irircrll it b m g h r : iubstaf.cn i ■ 7. Give a scenario where a cell may need to perform a form of exocytosis. A r -|.",;.y rrr, a 1-- --r.of i > ■ yrn-r- i j H I h g fid at c«H Waste

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