cellular structure & function. cell theory anton von leeuwenhoek created 1 st light microscope...
TRANSCRIPT
Cell Theory Anton Von Leeuwenhoek
Created 1st light microscope
Robert Hooke Coined the term “cells” –
resembled little rooms in monastery
Cell Theory Matthias Schleiden
Stated that all plants are made of cells Theodor Schwann
Stated that all animals are made of cells
Cell Theory
Robert Brown Discovers nucleus’(dark
center)role in division Rudolf Virchow
See & describe cell division
Cell Theory
1. All living things are made of cells.
2. Cells are the basic unit of structure & function.
3. All cells come from pre-existing cells.
Prokaryotic Cells Simplest cell No nucleus or organelles Contains cell wall/membrane,
cytoplasm, ribosomes, genetic material
Ex: bacteria
CELL WALL FOUND – plants FUNCTION – rigid
support & protection & movement of H20 & gasses
STRUCTURE – 3 layers Pectin; glue Cellulose Lignin
CELL MEMBRANE FOUND – both
plants & animals FUNCTION –
regulates in/out cell
STRUCTURE – 2 layers of lipids & protein “doorways”
NUCLEUS FOUND – both
plants & animals FUNCTION – control
center of cell STRUCTURE –
Nucleolus (center) Chromatin (DNA) N. envelope (outer)
CYTOPLASM FOUND – both
plants & animals FUNCTION –; holds
all organelles in place & site chemical rxns
STRUCTURE – gel-like material (colloid)
MITOCHONDRIA FOUND – both
plants & animals FUNCTION – make
energy STRUCTURE –
shaped like kidney bean Cristae – inner
membranes
RIBOSOMES FOUND – both
plants & animals FUNCTION – make
protein STRUCTURE –
composed of protein & RNA Free-floating Attached ER
ENDOPLASMIC RETICULUM FOUND – both
plants & animals FUNCTION –
transportation STRUCTURE –
Rough ER; ribosomes attached – moves proteins
Smooth ER; no ribosomes – makes & moves lipids
GOLGI APPARATUS FOUND – both
plants & animals FUNCTION –
package & distribute proteins & produce lysosomes
STRUCTURE – resembles stack of pancakes
CHLOROPLAST FOUND – plants FUNCTION – converts
light energy chemical energy site of photosynthesis
STRUCTURE – Grana (PSN
membranes) Stroma (surrounding
space)
LYSOSOME FOUND – animals FUNCTION –
dispose unwanted materials
STRUCTURE – filled with digestive enzymes
VACUOLE FOUND – both
plants & animals FUNCTION – water
storage STRUCTURE –
Plants – 1 large Animals – several
small
PLASTID FOUND – plants FUNCTION – stores
pigments (color) & food (starch)
STRUCTURE – hollow sac surrounded by double membrane & contain own DNA
CYTOSKELETON FOUND – animals FUNCTION – support &
movement STRUCTURE –
Microfilaments (muscle contractions)
Microtubules (internal scaffolding)
Cillia (external hairs help move)
Flagella (tail aids in movement)