Smallest units of an organism that can be considered alive.
If you shine light on a plant, it grows.
Example of irritability
Positive or Negative
Irritability is a deceiving name. The reaction of the organism to this stimulus can be ________ or ________.
Who created the cell theory?
All living things are composed of cells, cells are the basic unit of structure and function in living things, and new cells are produced from existing cells.
Discoveries that allowed scientists to develop the cell theory?
Compare the growth of an icicle to the growth of a tree.
Not all eyepieces have ________.
Point out specific structures or cells to help another person see what you see. Some pointers have a measurable scale.
Function of a pointer
Magnification of Obj. SCANNING
Magnification of Obj. LOW
Magnification of Obj. HIGH
What is the magnification of each eyepiece for each objective of the microscope?
Scanning power, low power, and high power.
List examples of the objectives of a microscope.
4 x 10=40
How do you calculate the total magnification for scanning power?
10 x 10=100
How do you calculate the total magnification for low power?
40 x 10=400
How do you calculate the total magnification for high power?
With 2 hands: one supporting the base and one holding the arm.
How should you lift the microscope out of the cabinet?
Keep the microscope away from the edge of the table by at least ___ inches.
Circle of light
Field of view
If you need to clean your lens, what should you use?
Keeping both eyes open.
What reduces eyestrain when looking into the microscope?
When first examining a slide under the microscope, you should use the iris to make the field of view as ______ as possible.
When you move the coarse adjustment knob toward you, what direction does the stage move? Away?
Lower the cover slip, remove the coverslip, dry it off, and start over.
How can you prevent air bubbles when creating a wet mount slide? And if it does happen?
Low power-brighter than high power.
Without adjusting the iris-compare the brightness of the field of view under low and high power.
What should you hold a coverslip by?
In what direction will your slide move if you are looking through the eyepiece, when the slide is moved to the right?
In what direction will your slide move if you are looking through the eyepiece, when the slide is moved to the left?
In what direction does the slide move, if you are looking through the eyepiece, when the slide is moved away from you?
Away from you
In what direction does the slide move, as you are looking through the eyepiece, when the slide is moved toward you?
You are looking at different layers of cells of your specimen. The higher the magnification, generally the shallower the depth of field.
“Depth of field” when you are focusing an object under the microscope, explain why some parts are in focus and some parts are out of focus.
All wet mount slides must be ______ before making the next wet mount slide to prevent _____________ and confusion.
The leaves of a plant are its main ______ of photosynthesis.
Guard cells ________ stomata.
Plants keep their stomata open just enough to allow photosynthesis to take place. During the day.
Generally when are stomata open?
Generally when are stomata closed?
Closed. Plant doesn’t want to loose too much water.
What may happen to stomata on a hot, dry, sunny day? (To stomata)
Outer layer of skin.
Protective layer of a leaf, on top and water to protect it from water and life needed
What are the holes in a plant’s epidermis called?
Stoma vs. Stomata
How many guard cells are there per stoma?
Water can evaporate out
What happens when a leaf’s stomata opens?
Small, circular shape.
Shape of guard cells
What power objective was used to count stomata?
Which side of the leaf had more stomata?
1/1000th of a millimeter
What was the onion cell stained with?
What was the potato cell stained with?
Nothing, its red pigment is enough for it to show up clearly on the slide.
What were the tomato skin and pulp stained with?
Nothing, it has a green pigment from chlorophyll in the chloroplasts.
What was the Elodea stained with?
What were the cheek cells stained with?
What was the yeast stained with?
Nothing. Living organism. Coverslip would crush it.
What was the Paramecium stained with?
Nothing. Living organism. Coverslip would crush it.
What was the bacteria stained with?
Seaweed-like organism. It is green.
What is elodea?
What is located within the chloroplasts?
The salt water will be used to make the cell membrane visible. Causes cells to lose water and collapse. As the cell collapses, the cell membrane will detach from the cell wall and finally become visible.
Explain what the salt water was used for in the elodea part of the lab.
They move rather quickly so I may have trouble keeping one in the field of view.
What may proven to be difficult while viewing the paramecium?
What type of indicator is iodine?
Coarse adjustment knob
Don’t use the ______ __________ ____ when on high power.
Always _____ your stage before removing your glass slide.
Are onion cells multicellular or unicellular?
Is onion auto/heterotroph?
Stores energy in the form of starch
Purpose of potato tuber?
Are potatoes multicellular or unicellular?
Are potatoes autotrophs or heterotrophs?
Are tomatoes multicellular or unicellular?
Are tomatoes autotrophs or heterotrophs?
Is Elodea multicellular or unicellular?
Is Elodea autotroph or heterotroph?
Dehydrated-all clump into the middle. Healthy-spread throughout the cell
Compare the location of the chloroplasts in a healthy Elodea cell to a dehydrated Elodea cell.
Are cheek cells multicellular of unicellular?
Are cheek cells autotrophs or heterotrophs?
Are hydra multicellular of unicellular?
Are hydra autotrophs or heterotrophs?
Is yeast multicellular or unicellular?
Are yeast cells autotrophs or heterotrophs?
Are bacteria multicellular or unicellular?
Is bacteria an autotroph or heterotroph?
Are paramecia multicellular or unicellular?
Are paramecia autotrophs or heterotrophs?
Are Euglena multicellular or unicellular?
Are euglena autotrophs or heterotrophs?