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 PresentationTRANSCRIPT
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DOWNLOAD THIS SLIDE For more slides click here
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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:
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Anatomy of a typical cell
1. Cell membrane
2. Cytoplasm
membranous organelles
non-membranous organelles
cytosol
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What else is also part of the cell membrane ?
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Cell membrane (plasma membrane, plasmalemma)
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Non-membranous OrganellesNon-membranous Organelles
Cytoskeleton Microvilli Cilia, centrioles, flagellum Ribosomes
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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
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2 centrioles direct formation of mitotic spindle
In 9+0 array
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Cilium - CiliaCilium - Cilia
Compare to microvilli and flagellum
In 9+2 array
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Ribosomes
60% RNA + 40% ________
workbench for __________
Fixed vs, free ribosomes
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Membranous Membranous OrganellesOrganelles
Names and functions ?
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Nucleus
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Mitochondrion / -a
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smooth & rough ER
Chambers = cysternae
Function: Synthesis Storage Transport
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Golgi ApparatusGolgi Apparatus
vesicles come from ?
Packaging and Packaging and shipping of proteinsshipping of proteins
Cell membrane renewal
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Lysosomes
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Intercellular Attachments
channel proteins (connexons) interlock and form pores
abundant in cardiac and smooth muscle
1) Gap Junctions
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2) Tight Junctions
Interlocking membrane proteins
Found near surface of cells lining the digestive tract. Explain!
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3) DesmosomesProteoglycan layer reinforced by transmembrane
proteins (cell adhesion molecules or CAMs)
Belt, button and hemidesmosomes
Found in superficial layers of skin
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