1. Unit 3 Chapter 7 A View of the Cell

2. What is an Organelle? Literally means “Little organ”
What do organs do for your body?
Organelles do the same kinds of things for cells
Small internal structure in a cell which carries out a specific job

4. Plasma Membrane
A flexible boundary between the cell and its environment maintains a balance of nutrients, etc.
Selective permeability
A process in which a membrane allows some molecules to pass through while keeping others out

6. Structure of the Plasma membrane
Phospholipids
A double layer that creates water-soluble outsides surrounding water insoluble insides
Transport Proteins
Span the entire membrane to regulate which molecules enter and which leave

7. What color is the plasma membrane?
What two kinds of molecules make up the plasma membrane?

8. What color is the plasma membrane? BLUE
What two kinds of molecules make up the plasma membrane? Phospholipids and Proteins

9. Because the YELLOW membrane only lets certain molecules through it is ____________ _____________.

10. Because the YELLOW membrane only lets certain molecules through it is Selectively Permeable.

11. Nucleus  cell control
Contains the genetic material (DNA)& acts as the control center of the cell
Nucleolus
A prominent body within the nucleus, which makes the ribosomes

14. This shows a picture of real cells
This shows a picture of real cells. What color is the part that contains the DNA?

15. Cytoplasm
Gel-like material containing organelles found between the nucleus and cell membrane
It’s the “jelly stuff” that everything floats in

18. Cytoplasmic Organelles
Endoplasmic reticulum
Highly folded membranes that is the site of cellular chemical reactions
Rough Endoplasmic reticulum (ER)
Have ribosomes attached
Smooth ER

20. Rough ER
Smooth ER

21. What color is the Endoplasmic Reticulum?

22. What color is the Endoplasmic Reticulum?

23. Cytoplasmic Organelles
Ribosomes
Small structures, free or attached to ER, which synthesize proteins

25. Rough ER
Smooth ER

26. Check for Understanding:

27. Cytoplasmic Organelles
Golgi apparatus
This organelle looks like a stack of pancakes. It modifies, sorts, & packages molecules the cell makes for export.

29. Cytoplasmic Organelles
Vacuoles
Membrane-bound compartments for temporary storage of materials
May be very large in plant cells

30. Cytoplasmic Organelles
Lysosomes
Small bodies filled with digestive enzymes that digest worn-out organelles, food particles, and even engulfed bacteria
Responsible for the cell’s recycling of materials

31. What organ system would you compare a lysosome to?

32. What organ system would you compare a lysosome to?
The Digestive system!!!!!

33. Cytoplasmic Organelles
Mitochondria
Powerhouse of the cell with its own DNA that burns glucose for energy and stores it as ATP
Many folds
Rod-shaped

34. The Mighty Mitochondria!!!

36. There are certain organelles only found in Plant cells
Cell walls
Chloroplasts

37. Cell Wall
Found outside the cell membrane in plants and bacteria, this supports and protects cells.

38. Cytoplasmic Organelles
Chloroplasts
Containing the green pigment, chlorophyll, these oval bodies capture light energy and turn it into chemical energy (photosynthesis)

40. Cilia and Flagella are only found in animal cells

41. Cytoplasmic Organelles
Cilia & Flagella
External microtubules that aid the cell in locomotion or feeding

42. Cilia
Many, short hair-like structures made of microtubules that are attached to the outside of cells which help move the cell or move things past the cell

43. Flagella
Few, long hair-like structures made of microtubules that are attached to the outside of cells which help move the cell

46. Cytoplasmic Organelles
Cytoskeleton
Tiny rods and filaments (called microtubules) that form a supporting framework for the cell and function in cytoplasmic streaming