today’s class is on… cell structures
DESCRIPTION
TODAY’s Class is on… Cell Structures. Introduction to Cells: http ://www.youtube.com/watch?v=gFuEo2ccTPA. Agenda Misconceptions of Cells vs Atoms Finish up Cell Theory: Stem Cells Label Organelles Cells Sheet Introduce Virus Homework Assignment. Misconception - PowerPoint PPT PresentationTRANSCRIPT
TODAY’s Class is on…
Cell Structures
Introduction to Cells:
http://www.youtube.com/watch?v=gFuEo2ccTPA
Agenda
• Misconceptions of Cells vs Atoms
• Finish up Cell Theory: Stem Cells
• Label Organelles Cells Sheet
• Introduce Virus Homework Assignment
Misconception
Students confuse models of cells with atoms…oh
no!
Contains and guards the nucleus which houses the cell's genetic material
Holds neutrons and protons
Atoms are not alive. They do not divide like cells.
Splitting a Cell Splitting an Atom
VS
All matter is composed of atoms
Cell Theory states:1. All organisms are composed of one or
more cells.
2. The cell is the most basic unit of structure and organization in all organisms
3. All cells arise from pre-existing cells
Atom and Cells are Fundamental Units
Understanding Scale is Important
Size Comparison:
http://www.youtube.com/watch?v=0fKBhvDjuy0
http://www.youtube.com/watch?v=fUAFqkS7y9M
Next Topic: Stem Cells
Stem Cells contain the capacity to divide and differentiate along different pathways. Eg. Blood cells, Skin cells, etc.
Positives: Stem Cell Therapy
BBC (4min) http://www.youtube.com/watch?v=cEB8656TCIE
Concern: Using Human Embryo(less than 4 days old)
Discussion• One side: The creation of a human embryonic
stem cell line requires the destruction of human embryo.
• Other side: Medical treatments using stem cells could be developed for a wide range of conditions: eg. Blindness, Parkinson’s, Deafness, Spinal Cord damage.
• Should we use stem cells?• Does the human embryo have human rights?
Think, Pair up and Share your thoughts
Next Activity: Labeling Parts of Cells
Label These Organelles:
– Cell Membrane– Nucleus– Cell Wall– Cytoplasm– Cytoskeleton– Ribosomes– Smooth vs Rough Endoplasmic Reticulum– Golgi Apparatus– Mitochondria– Lysosomes– Cilia and Flagella– Centrioles– Vacuoles– Plastids
14
Prokaryotic Cells Eukaryotic CellsNo nucleus Has a nucleus
No membrane bound organelles Membrane bound organelles
Unicellular Unicellular or multicellular
Naked circular DNA, no chromosomes
DNA associated with proteins, wound into chromosomes
No mitochondria Mitochondria for respiration
70s ribosomes 80s ribosomes
ie Bacteria like E. coli
ie cells found in animal, plant and fungi
Homework for Next Class:
• Go on Weebly and you will see homework for next class
• You will investigate a virus and present your finding next class
• Must come in prepared with notes of the functions of organelles.
• Instructions are on Weebly
Extra Videos
Crash Course on Eukaryotes: http://www.youtube.com/watch?v=cj8dDTHGJBY
Cellular State of Mind Youtube Video: http://www.youtube.com/watch?v=jqUhWDp73bM
A Stem Cell Story: http://www.youtube.com/watch?feature=player_embedded&v=2-3J6JGN-_Y