3. What is a cell?
…membrane bound structure, it is
the smallest unit of life.
4. Important people who helped
discover cells
1) Robert Hooke – looked at cork
cells named the
1665 structure “cell”
2) Anton von Leeuwenhoek
looked at pond water, was
1st to look at living cells!
1700
5. Microscopes
Only been around for about 250
years.
Several types:
Light microscope
Electron microscope
(SEM & TEM)
10. What are the 3 parts to the Cell
Theory?
1) All living things are made of at
least 1 cell.
2) Cells are the basic unit of
structure & function of life.
3) Cells only come from other living
cells.
11. Are there differences between
cells?
1) Different shapes
2) Different sizes
3) Different internal organization
12. Quackstort! 10/15
• Write the three parts of the cell theory.
• Use your notes if you can’t remember.
• Smile.
• Table of Contents - Write:
Prokaryotes & Eukaryotes
17. Eukaryote
• Has nucleus
• Has DNA & rod shaped
chromosomes
• Has many membrane-bound
organelles
• Can be unicellular or multicellular
• Ex: fungus, plants, my dog, Mr. R
24. Endoplasmic Reticulum
2 types: smooth ER (no ribosomes)
rough ER (with ribosomes)
Snuggles up to the nucleus
Helps with movement of substances
within the cell, Smooth ER also helps
make steroids & break down toxins.
29. Proteins (NOT an organelle)
• Proteins are the building blocks
that make up all of the structures
in the cell.
30. Lysosomes
Lysosomes are vesicles that
contain digestive enzymes that:
Breaks down old cell parts & some
wastes.
Also destroys any invaders (like
bacteria)
31.
32. Mitochondria
Most of the energy cell’s need is
made here! (cell respiration)
Changes “food” into energy.
34. Cytoplasm/Cytoskeleton
Cytoplasm = jelly like substance in
the cell
Cytoskeleton = made up of
microtubules & microfiliments
Both are important for providing
structural support in intracellular
movement.
44. Some other cell parts to be
aware of…
1) Cilia – hair-like structures
usually help cells move
2) Pili – hair-like structures that
help bacteria stick to surfaces
and share DNA with other
bacteria.
3) Flagella (flagellum) – whip-like
tail, helps cell move
45.
46. 3) Vacuoles – hold or store wastes,
water, food. Plants usually have
1 large vacuole and many
smaller ones, animal cells have
small ones.
4) Centrioles – only in animal cells,
help with cell division
47. Cells – general information
Cell size is limited by the ratio of
surface area to volume.
Cell with particular functions will
have more of some organelles &
less of some organelles.
