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Cell structure and function

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Presentation on theme: "Cell structure and function"— Presentation transcript:

1 Cell structure and function

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3 6 1 24 8 3 = Surface area (square mm) Volume (cubic mm) (2mm)3 = 8 mm3 64 × mm2 = 24 mm2 2 mm 1 mm 6 × 1 mm2 = 6 mm2 (1 mm)3 = 1 mm3

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6 nuclear pores smooth ER envelope chromatin nucleolus rough ER

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11 H2O + – charged molecules and ions aquaporin noncharged molecules
phospholipid molecule protein macromolecule aquaporin noncharged molecules H2O charged molecules and ions

12 Diffusion: plasma membrane particle water cell cell time
a. Initial conditions b. Equilibrium conditions

13 (all): © Dennis Kunkel/Phototake
a. Isotonic solution (same solute concen- tration as in cell) b. Hypotonic solution (lower solute concen- tration than in cell) c. Hypertonic solution (higher solute concen- tration than in cell) (all): © Dennis Kunkel/Phototake

14 Facilitated transport: K+ Na+ Inside Outside glucose

15 Active transport: Na+ Inside Outside K+ P ATP ADP

16 Endocytosis Exocytosis plasma membrane vacuole a. Phagocytosis solute
vesicle b. Pinocytosis receptor protein coated vesicle coated pit c. Receptor-mediated endocytosis Exocytosis

17 cytoplasmic plaque filaments of cytoskeleton plasma membranes tight junction proteins a. Adhesion junction intercellular space filaments b. Tight junction membrane channels c. Gap junction

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