Section 1 2 Basic Cell Structure Mrs Leos
Section 1. 2 Basic Cell Structure Mrs. Leos
Bell Work Draw a Venn Diagram to compare and contrast multicellular and unicellular organisms.
Multicellular: l Many cells, very complex, easier to see Unicellular: l One cell, cannot be seen directly Both: l Need energy, materials, and living space
REVIEW- Cell Smallest living unit of an organism Grow, reproduce, use energy, adapt, respond to their environment Many cannot be seen with the naked eye
Prokaryotes Single celled organism Lacks a cell nucleus Unicellular
Eukaryotes Organism made up of cells that have a nucleus May have billions of cells Human body has at least 85 different cell types
Common structures Organelles – l smaller parts of the cell with specific functions
Cell Membrane l. Acts as a gatekeeper l. Controls what enters and leaves the cell
Cell wall Provides additional structure and protects the cell from pressure caused by movement of water Animal cells do not have walls
Cytoplasm Organelles are surrounded by a jelly like substance Primary component is water
Nucleus Controls activity of the cell Round or oval structure Typically found in the middle of the cell Appears darker than surrounding material
Ribosome Make proteins for cellular use and communication May be attached to endoplasmic reticulum
Endoplasmic reticulum Make and transport proteins
Vacuole Large organelle, without specific shape Stores waste
Golgi Apparatus Adds modifications to unfinished proteins Makes lysosomes Look like a thick elastic band that has been folded several times
Lysosome Small round Store enzymes that break down food into chemical compounds
Mitochondria Use oxygen to get energy from processing food Rod shaped
Chlorplast Found in plants and some other organisms
Ok, let’s make sense of this On the left side of your notebook Demonstrate your understanding l Write a 5 -7 sentence summary l
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