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Ch2: The Cell

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Ch2: The Cell. DOWNLOAD THIS SLIDE. For more slides click here. Key Points:. Structure (and importance) of cell membrane Structure (and function) of organelles Interconnections between cells to maintain structural stability in body tissues. Anatomy of a typical cell. Cell membrane - PowerPoint PPT Presentation

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Page 2: Ch2: The Cell

1. Structure (and importance) of cell membrane

2. Structure (and function) of organelles

3. Interconnections between cells to maintain structural stability in body tissues.

Key Points:

Page 3: Ch2: The Cell

Anatomy of a typical cell

1. Cell membrane

2. Cytoplasm

membranous organelles

non-membranous organelles

cytosol

Page 4: Ch2: The Cell

What else is also part of the cell membrane ?

Page 5: Ch2: The Cell

Cell membrane (plasma membrane, plasmalemma)

Page 6: Ch2: The Cell

Non-membranous OrganellesNon-membranous Organelles

Cytoskeleton Microvilli Cilia, centrioles, flagellum Ribosomes

Page 7: Ch2: The Cell

CytoskeletonCytoskeleton

4 major components:

1. Microfilaments (mostly actin)

2. Intermediate filaments

3. Thick filaments (composed of myosin subunits)

4. Microtubules (composed of tubulin subunits)

Fu: support & movement of cellular structures & materials

Page 8: Ch2: The Cell
Page 9: Ch2: The Cell

2 centrioles direct formation of mitotic spindle

In 9+0 array

Page 10: Ch2: The Cell

Cilium - CiliaCilium - Cilia

Compare to microvilli and flagellum

In 9+2 array

Page 11: Ch2: The Cell

Ribosomes

60% RNA + 40% ________

workbench for __________

Fixed vs, free ribosomes

Page 12: Ch2: The Cell

Membranous Membranous OrganellesOrganelles

Names and functions ?

Page 13: Ch2: The Cell

Nucleus

Page 14: Ch2: The Cell

Mitochondrion / -a

Page 15: Ch2: The Cell

smooth & rough ER

Chambers = cysternae

Function: Synthesis Storage Transport

Page 16: Ch2: The Cell

Golgi ApparatusGolgi Apparatus

vesicles come from ?

Packaging and Packaging and shipping of proteinsshipping of proteins

Cell membrane renewal

Page 17: Ch2: The Cell

Lysosomes

Page 18: Ch2: The Cell

Intercellular Attachments

channel proteins (connexons) interlock and form pores

abundant in cardiac and smooth muscle

1) Gap Junctions

Page 19: Ch2: The Cell

2) Tight Junctions

Interlocking membrane proteins

Found near surface of cells lining the digestive tract. Explain!

Page 20: Ch2: The Cell

3) DesmosomesProteoglycan layer reinforced by transmembrane

proteins (cell adhesion molecules or CAMs)

Belt, button and hemidesmosomes

Found in superficial layers of skin

Page 21: Ch2: The Cell