1. Ch2: The Cell

2. Key Points: Structure (and importance) of cell membrane
Structure (and function) of organelles
Interconnections between cells to maintain structural stability in body tissues.

3. Anatomy of a typical cell
Cell membrane
Cytoplasm
non-membranous organelles
cytosol
membranous organelles

4. What else is also part of the cell membrane ?

5. Cell membrane (plasma membrane, plasmalemma)
Membrane permeability covered in physiology

6. Non-membranous Organelles
Cytoskeleton
Microvilli
Cilia, centrioles, flagellum
Ribosomes

7. Cytoskeleton 4 major components: Microfilaments (mostly actin)
Intermediate filaments
Thick filaments (composed of myosin subunits)
Microtubules (composed of tubulin subunits)
Fu: support & movement of cellular structures & materials

9. 2 centrioles direct formation of mitotic spindle
In 9+0 array

10. Cilium - Cilia
In 9+2 array
Compare to microvilli and flagellum

11. Ribosomes 60% RNA + 40% ________ workbench for __________
Fixed vs, free ribosomes

12. Membranous Organelles
Names and functions ?

13. Nucleus

14. Mitochondrion / -a

15. smooth & rough ER Function: Synthesis  Storage  Transport
Chambers = cysternae
Function: Synthesis  Storage  Transport

16. Golgi Apparatus Packaging and shipping of proteins
Cell membrane renewal
vesicles come from ?

17. Lysosomes

18. Intercellular Attachments
1) Gap Junctions
channel proteins (connexons) interlock and form pores
abundant in cardiac and smooth muscle

19. 2) Tight Junctions Interlocking membrane proteins
Found near surface of cells lining the digestive tract. Explain!

20. 3) Desmosomes
Proteoglycan layer reinforced by transmembrane proteins (cell adhesion molecules or CAMs)
Belt, button and hemidesmosomes
Found in superficial layers of skin

21. The End