Cells History n Robert Hooke Observed cork from

Cells

History n Robert Hooke ¨ Observed cork from plants ¨ “a great many little boxes” n Reminded him of cubicles or “cells” where monks live

History n Anton van Leeuwenhoek ¨ First n person to observe living cell Cell Theory ¨ All living organisms are composed of one or more cells ¨ Cells are the basic units of structure & function in an organism ¨ Cells come only from the reproduction of existing cells

Basic Types Prokaryotes n Eukaryotes n What is the difference? n

What type of cell?

Cell Organelles n n n n Plasma membrane Nucleus Mitochondria Ribosomes Endoplasmic reticulum Golgi apparatus Vesicles ¨ n n Lysosomes, peroisomes Cytoskeleton Cell wall Vacuole Chloroplast

Organelles n Plasma membrane ¨ Regulates n Nucleus ¨ Controls n what goes in & out of the cell; where DNA is located Mitochondria ¨ Creates House” the energy for the cell. “Power

Organelles n Ribosomes ¨ Builds n proteins Endoplasmic Reticulum ¨ Moves molecules from one part to n Rough ER-ribosomes are attached n Smooth ER n Golgi Apparatus ¨ Packs, modifies, & ships proteins another

Organelles n Vesicles ¨ Lysosomes-digestive enzymes ¨ Peroxisomes-break down alcohol, bacteria, & fatty acids n Cytoskeleton ¨ Gives n cell shape Cytoplasm ¨ Holds organelles in place

Organelles (Only in Plants) n Cell Wall ¨ Rigid n layer outside plasma membrane Vacuole ¨ Stores n large amounts of water Chloroplast ¨ Where photosynthesis takes place

Plant vs. Animal Cells n Mostly the same organelles EXCEPT ¨ Cell wall ¨ Vacuole ¨ Chloroplast

Eukaryote Types Plant Cell n Animal Cell n

Cell Analogy n Write an analogy using all the organelles found in both plant & animal cells ¨ Plasma membrane ¨ Nucleus ¨ Mitochondria ¨ Ribosomes ¨ Endoplasmic reticulum ¨ Golgi apparatus ¨ Vesicles n Lysosomes, peroisomes ¨ Cytoskeleton