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