Lesson4 cell modifications

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1. PRAYER

2. ATTENDANCE SEPTEMBER 6, 2021

3. C h a p t e r 4 Cell Modification Prepared by: MR. Amado Sarangay Banawa Jr. Faculty, SHS Biology Department

4. Learning Objectives: Define cell modification enumerate and describe the three types of cell modification characterize apical, basal and lateral cell modifications give examples of apical, basal and lateral cell modifications

5. Ov e rvie w : Definition of Cell modification Three types of Cell Modification Examples of Apical, Basal and Lateral Cell Modification Functions of the different Cell Modification

6. What is Cell Modification? Are specialized or modifications re-acquired by the cell after cell division that helps the cell in different beneficial ways

7. Cell Modification Apical Cilia Flagella Microvilli Pseudopods Cell wall ECM Glycoprotein C o ll a g e n Basa l H e mi d es m oso m e s Lateral Tight Junctions Adhering Junctions Gap Junctions

8. base m e n t m e m b r an e A Three types of cell junctions in animal tissues. ga p j un c t i o n s a dhe r i n g j un c t i on s t i g h t j un c t i on s free surface of epithelial tissue plasmodesma ER cytoplasm p l a s m a m e m b r an e ce l l w a l l B Plasmodesmata are channels that connect the cytoplasm and ER of adjacent plant cells.

9. Apical Modification Cell modification found on the apical surface of the cell ba s e m e nt m e m b r an e ga p j unc t i o n s a dhe r i n g j un c t i on s t i g ht j u n c t i ons f r e e su r fa c e o f ep i t he l i al t i ssu e

10. Apical Modification Cilia and Flagella Cilia are usually short, hair-like structures that move in waves Flagella are long whiplike structures Formed from microtubules

11. Apical Modification Cil i a Fl a ge l lum

12. Apical Modification Villi and Microvilli Villi are finger-like projections that arise from the epithelial layer in some organs. They help to increase surface area allowing for faster and more efficient adsorption Microvilli are smaller projections that arise from the cell's surface that also increase surface area allowing faster and more efficient absorption

13. Apical Modification Pseudopods Temporary, irregular lobes formed by amoebas and some other eukaryotic cells Bulge outward to move the cell or engulf prey

14. Apical Modification Extra Cellular Matrix (ECM) Compound secreted by the cell on its apical surface Cell wall is the extracellular structure in plant cells that distinguishes them from animal cells Glycoprotein is the main ingredient of ECM in animal cells

15. Apical Modification

16. Basal Modification Cell modification found on the basal surface of the cell ba s e m e nt m e m b r an e ga p j unc t i o n s a dhe r i n g j un c t i on s t i g ht j u n c t i ons f r e e su r fa c e o f ep i t he l i al t i ssu e

17. Basal Modification Desmosomes/Hemidesmosomes Anchoring junction on the basal surface of the cell Rivet-like links between cytoskeleton and extracellular matrix components such as the basal lamina that underlie epithelia Primarily composed of keratin, integrins and cadherins

18. Basal Modification

19. Lateral Modification Cell modification found on the basal surface of the cell

20. Lateral Modification Tight Junction Act as barriers that regulate the movement of water and solutes between epithelial layers Prevent leakage of ECF

21. Lateral Modification Adhering Junction Anchoring junction on the lateral surface of the cell Very similar to the anchoring junction of the basal surface of the cell Fasten cells to one another ba s e m e nt m e m b r an e Three types of cell junctions in animal tissues. ga p j unc t i o n s a dhe r i n g j un c t i on s t i g ht j u n c t i ons f r e e su r fa c e o f ep i t he l i al t i ssu e

22. Lateral Modification Gap Junction Also known as communicating junctions Closable channels that connect the cytoplasm of adjoining animal cells Presence of connexon that allow direct exchange of chemicals between the cytoplasm of two cells ba s e m e nt m e m b r an e Three types of cell junctions in animal tissues. ga p j unc t i o n s a dhe r i n g j un c t i on s t i g ht j u n c t i ons f r e e su r fa c e o f ep i t he l i al t i ssu e

23. Assi g nme n t Visit the link: http://www.diffen.com/difference/Eukaryotic_Cell_v s_Prokaryotic_Cell