Transcript Plant and Animal Cells - kyoussef-mci

Plant and Animal Cells
Section 2.1
http://www.youtube.com/watch?v=zrXykvorybo
Organisms!
Fungi
Animal
absorptive
nutrition
ingestive
nutrition
Plant
autotrophs
heterotrophs
E.g. Amoeba
Single-celled
organisms
Bacteria
Multicellular
organisms
Archaebacteria
prokaryotes
Oranisms
eukaryotes
bacteria
cells
Types of cells
Prokaryote
- no nucleus
Eukaryotes
- nucleus
animal cells
plant cells
Cell Size Comparison
most bacteria
Animal cell
Bacterial cell
 1-10 microns
eukaryotic cells
 10-100 microns
 micron = micrometer = 1/1,000,000 meter
 diameter of human hair = ~20 microns
The Cell Theory
1. All living things are made
up of one or more cells.
2. The cell is the simplest
unit that can carry out life
processes.
3. All cells come from other
cells; they do not come
from non-living matter.
A short history lesson…
• http://ed.ted.com/lessons/the-wacky-history-of-cell-theory
• What advancement allowed humans to “discover”
cells? Why?
– The discovery of the microscope. Cells are so small
that you cannot see them without the help of a
microscope.
• What did Anton van Leeuwenhoek discover? How did
he discover this?
– He discovered “animalcules” or bacteria by looking at
dental scrapings.
• Who wasRobert Hooke? What did he contribute to
biology?
– R. Hooke was the first person to observe cells. He
observed cork under the microscope and called what
he saw “cells” after the rooms where monks slept in
monasteries.
• Which two scientists came up with the cell theory?
– Schleiden and Schwann
Why study cells?
• Cells  Tissues  Organs  Organ System 
Organism
– bodies are made up of cells
– cells do all the work of life!
The Work of Life
• What jobs do cells have to do for an organism to live…
– “breathe”
• gas exchange: O2 in vs. CO2 out
– eat
• take in & digest food
ATP
– make energy
• ATP
– build molecules
• proteins, carbohydrates, fats, nucleic acids
– remove wastes
– control internal conditions
• homeostasis
– respond to external environment
– build more cells
• growth, repair, reproduction & development
The Jobs of Cells
• Cells have 3 main jobs
– make energy
ATP
• need energy for all activities
• need to clean up waste produced
while making energy
– make proteins
• proteins do all the work in a cell,
so we need lots of them
– make more cells
• for growth
• to replace damaged or diseased cells
Our organelles
do all these
jobs!
Cell Organelle Hunt
• WS#1: Plan and Animal Cell Structures
– Based on text “Cell Structure” Pg. 29-32
• Complete Pg. 32 #1-8