Transcript Cell organelles Lecture

Cytoplasm: Gel-like material inside
cells
Cell Membrane: “GATE KEEPER”—
Controls what goes in and out
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NUCLEUS: Directs all cell activities
With the
electron
microscope
NUCLEOLUS: Helps to make protein;
Found inside nucleus
CHROMATIN (DNA): Contains genes
or instructions for cell’s activities
(found in nucleus)
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Under the electron microscope:
ENDOPLASMIC RETICULUM:
Pathway for moving materials through
cell (the “express-way”); usually close
to the nucleus
RIBOSOMES: Make protein!
Under the electron microscope:
A simple diagram
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Under the electron microscope:
MITOCHONDRIA: Releases energy in
the cell; the “powerhouse”
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Under the electron microscope:
CHLOROPLAST: Converts sunlight
into cell energy (Found in plants
ONLY!)
Under the microscope
CELL WALL: The outer structure in
plant cells; made of cellulose
Under the microscope
VACUOLES: Store water, food, and
waste products
Under the microscope
GOLGI BODIES: Nicknamed “UPS”—
Packages & secrete substances made
inside the cell
Under the microscope
LYSOSOMES: Digests cell wastes
“garbage disposal”
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What are the two parts plant
cells have that animal cells do
not have?
• Cell Walls
• Chloroplasts
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Cell Structures by Brainpop
Prokaryotic vs. Eukaryotic
Prokaryotic Cells:
NO NUCLEUS
Eukaryotic Cells:
have a TRUE NUCLEUS
Example: Bacteria
Example: all cells in your body
What is the difference between
a single cell and cells working
together?
Single Cells do everything by themselves;
Cells in tissues and organs divide up the
work!
In many-celled organisms, cells work
together to accomplish their work:
TISSUES:
Cells look ALIKE, perform the same
function.
Examples: MUSCLE TISSUE,
NERVE TISSUE
ORGANS:
A structure made up of different
kinds of TISSUES that all work
together to perform the same JOB.
Examples: HEART, BRAIN, LUNGS
SIZES AND SHAPES OF CELLS
Cells have different sizes and shapes,
based on their JOB
Some can be very SMALL and some
can be very BIG
Cell Specialization by Brainpop
Types of Cells Clip
(~6 min)
For Tuesday
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Cells Alive WS Completed
Cover Page Done
Article about cells with you – no summary yet
Cell ANALOGY Worksheet done
Ready for Quiz on Cell Organelles – Function and
Compare to other things here at Kinard
• Begin CELL PROJECT – See new Handout
For Tuesday
• Cell ANALOGY Worksheet done
• Ready for Quiz on Cell Organelles –
Function and Compare to other things here
at Kinard
• Entire Packet due on Monday 4/13 or 4/15
• Cell Project Due on 4/13 (Monday)
Microscope – Guidelines for Use
1.
2.
3.
4.
5.
6.
Handle with care! ($500 piece of equipment)
Always hold in an upright position, with both hands.
Don’t touch the lens of the microscope with your hands, Use only lens
paper, (Not Kleenex tissue)
Always start the process on the Lowest Power (smallest objective)
If using highest power objective, only use the fine adjustment…
Clean-up:
a) Rotate nose piece to the lowest power
b) Wrap cord around the base
c) Lower the stage all the way down
d) Cover with dust cover
e) Check microscope into the teacher
f) Put carefully on cart
Parts of a Microscope
• Students read out-loud Read top of page
_____
• Fill in parts/functions using _____ as a tool
Rest of the Day - Goals
• Create:
Title Page
• Begin Table of
Contents
• Make History of the
Cell Timeline
• Chapter 1 Questions –
Page 13 # 1,2,3
I will look for significant
progress on these four
parts on MONDAY
Do Now 2/14 - Microscopes
• You are going to use the microscope today.
• List three safe-handling procedures with the
microscope?
• What steps do you take to view a prepared
slide?
• If you want to look at it at a higher
magnification, what should you do?
• I am looking at my slide through the eyepiece
and the DIN 10 objective….
• What is the total magnification of the slide?