Download presentation
Presentation is loading. Please wait.
Published byNicholas Lloyd Modified over 9 years ago
1
Chapter 8 n A Tour of the Cell
2
How can we see cells? n Light microscope – Uses light and lenses to magnify n Electron microscope – Uses beam of electrons – Gives a 3-D picture n Not a flashcard.
3
Electron vs. Light What can you see without a microscope? n Not a flashcard.
4
Here are some pictures of cells View the size of cells n Not a flashcard.
5
Cell Types Bone Cell Muscle Cell Nerve Cell Cartilage Cell Blood Cell Small Intestine Cell n Not a flashcard.
6
Discovery of the Cell n Made possible by the development of the microscope n Robert Hooke first used a microscope in 1665 n Examined a thin slice of cork n Found similar formations, “a great many little boxes,” when looking at stems of trees, carrots, and ferns n Cells – named after the small rooms in which monks lived
7
Cork cells n Not a flashcard.
8
Cell Theory The 3 Parts to the Cell Theory: All living things are composed of one or more cells Cells are the basic units of life All cells come from pre-existing cells
9
There are 2 types of cells n Prokaryotic Example: bacteria n Eukaryotic Examples: plant & animal
10
Which is Bigger? Bacteria Cell Animal Cell Plant Cell Small Bigger Biggest n Not a flashcard.
11
Cell Type: Prokaryotic n No true nucleus n No organelles with membranes
12
Cell Type: Eukaryotic n Has at least 1 true nucleus n Has organelles with membranes
13
Prokaryotes vs. Eukaryotes
14
Why aren’t cells large? n As cell size, the surface area to volume ratio n Rates of chemical exchange may then be inadequate for cell size n Cell size, therefore, remains small
15
Cell Size n Not a flashcard.
16
Surface Area to Volume Ratio n Not a flashcard.
17
Unicellular vs. Multicellular n Unicellular Made of only ONE cell n or Multicellular Made of more than one cell
18
Organelles There are 16 organelles I would like you to know. n Be able to label each of them and describe their functions. n Not a flashcard.
19
Cell Wall n Not in animal cells n Provides: protection shape support
20
Cell Membrane n Made of phospholipids n Selectively permeable n Maintains homeostasis
21
The Cell Membrane… Controls what enters and leaves the cell n Not a flashcard.
22
Cytoplasm n Clear fluid that surrounds the organelles n Jelly-like
23
The Cytoskeleton n Fibrous network in cytoplasm n Provides support and maintains shape n Made of microtubules
24
Nucleus The cell’s control center Contains DNA RNA is made here
25
Nucleolus n Inside the nucleus n Produces ribosomes
26
Mitochondria n Makes energy n The more mitochondria, the more energy the cell can produce! (muscle cells)
27
Endoplasmic Reticulum n A folded membrane attached to the nucleus n ‘Intra-cellular highway’
28
Ribosomes n Small and ‘circular’ n Assembles amino acids to make proteins
29
Vessicles n Small packages that transport proteins from the ER to the Golgi apparatus
30
Golgi Apparatus n Flattened sacs n Packages proteins and lipids to leave the cell
31
Lysosomes n sacs of enzymes n digests particles
32
Vacuoles n Stores food, enzymes, and waste n Plants: only 1 LARGE
33
Chloroplasts n Found only in plants n Contains chlorophyll (green) n Converts sunlight to useable energy
34
Elodea Cells n Not a flashcard.
35
Centrioles n Used in cell replication; only in animal cells n Pulls chromosomes apart
36
Cilia vs. Flagella Locomotive appendages: n Cilia is short and hairlike (large #’s) n Flagella is longer and whiplike (small #’s)
37
Real Pictures of Cilia n Not a flashcard.
38
It’s all connected! n Not a flashcard.
39
Difference Between Plant & Animal Cells Plant Cells Have: n A Cell wall n Chloroplasts n Larger vacuole n No centrioles
40
A Plant Cell n Not a flashcard.
41
A Real Plant Cell n Not a flashcard.
42
Another Plant Cell Important Info! n Not a flashcard.
43
An Animal Cell n Not a flashcard.
44
Another Animal Cell n Not a flashcard.
45
Cell Cheer!
46
The End! See you soon!
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.