Cells Animal cells Plant cells Specialised cells Organisation Organ systems.
Plant Cells
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Cytoskeleton Mitochondrion Nucleus Rough endoplamsic reticulum (ER) Ribosomes Smooth endoplasmic reticulum (ER) Golgi apparatus Plasmodesmata Plasma membrane Chloroplast Cell wall Central vacuole Not in animal cells Plant Cells
description
Plant Cells. Not in animal cells. Cytoskeleton. Mitochondrion. Central vacuole. Nucleus. Cell wall. Rough endoplamsic reticulum (ER). Chloroplast. Ribosomes. Plasma membrane. Smooth endoplasmic reticulum (ER). Plasmodesmata. Golgi apparatus. Plant Cells. Walls of two adjacent - PowerPoint PPT Presentation
Transcript of Plant Cells
Cytoskeleton
Mitochondrion
Nucleus
Rough endoplamsicreticulum (ER)
Ribosomes
Smoothendoplasmicreticulum (ER)
Golgi apparatus
Plasmodesmata
Plasmamembrane
Chloroplast
Cell wall
Centralvacuole
Not in animal cells
Plant Cells
Plant cells are encased by cell walls
Walls of two adjacentplant cells
Vacuole
Plasmodesmata(channels between cells)
Plant Cells
Chloroplasts are the sites of photosynthesis, the conversion of light energy to chemical energy
ChloroplastsInner and outermembranes ofenvelope
Space betweenmembranes
Stroma (fluid inchloroplast)
Granum
Origin of Eukaryotes
Membrane Structure● The plasma membrane separates the living cell from its nonliving surroundings.
(a) Phospholipid bilayer ofmembrane
(b) Fluid mosaic model ofmembrane
Outside of cell Outside of cellHydrophilicheadHydrophobictail
Hydrophilicregion ofprotein
Hydrophilichead
Hydrophobictail
Hydrophobicregions ofprotein
Phospholipidbilayer
Phospholipid
Proteins
Cytoplasm (inside of cell)
Cytoplasm (inside of cell)
Membrane Structure
Membrane Structure● Phospholipid structure
Phospholipids are amphipathic molecules
Membrane Structure
Membrane Models:
1935 Today
*Membranes are fluid
Membrane Structure
Membranes are fluid
Membrane Structure
Membrane Structure
Fibers ofextracellularmatrix
Cytoskeleton Cytoplasm
Attachment tocytoskeleton andextracellularmatrix
Cell signaling
Enzymatic activity
Transport
Intercellularjoining Cell-cell
recognition
Cytoplasm
● Some functions of membrane proteins
● Cell surface – Extracellular Matrix
Membrane Structure
Membrane Transport
Membrane Transport• Diffusion – a process in which molecules move from an
area of high concentration to an area of low concentration Molecules of dye Membrane
(a) Passive transport of one type of molecule
Net diffusion Net diffusion Equilibrium
Membrane TransportAnimal cell
Plant cell
Normal
Flaccid (wilts)
Lysing
Turgid
Shriveled
Shriveled
Plasmamembrane
H2OH2O H2O H2O
H2OH2OH2O H2O
(a) Isotonicsolution
(b) Hypotonicsolution
(c) Hypertonicsolution
