Manic Microscopes
What kind of microscope have we used in class?
Light Compound Microscope
Cuticle, upper epidermis, palisade mesophyll, spongy mesophyll, lower epidermis, cuticle.
What happens to a cell when you put it into a high concentration solution (hypertonic)?
The cell shrinks
Objective lens x eyepiece lens
What is the scientific name of the cell membrane?
Phospholipid bilayer
How can we improve the resolution and contrast of a specimen for a microscope?
Using stains (dye or fluorescents)
What kind of cell transport occurs when guard cells open and close?
When the K+ ions are pumped into the guard cell that is through active transport because they are going against the concentration gradient.
What are the three types of passive diffusion and two types of active diffusion?
Osmosis, simple, facilitated
Endocytosis, exocytosis
What is 6.2 mm in um?
6200 um
What is the role of the cytoplasm?
To hold water, nutrients and protect organelles
As FOV decreases, magnification ______
increases
What kind of cells make up the vascular bundle?
xylem and pholem cells
What are the three key differences between plant and animal cells?
1. cell wall 2. chloroplast 3. vacuole size
What is the formula for determing the size of a cell from a field of view?
FOV / # of cells that fit across FOV
What makes the rough Er rough?
ribosomes
What did Robert Hooke do in terms of microscopy?
Why do plants need specialized cells?
2. because plants are a multicelluar organism
The cell membrane is semi ________. What does that mean?
permeable.
some thing can cross but not everything.
If a cell is roughly 340 um, and it fits across one third of the FOV, then what is the FOV in um?
FOV = 1020 um
Name seven organelles found in BOTH animal and plant cells
Rough ER, Smooth ER, nucleus, mitochondria, vacuole, cell membrane, ribosomes, lysosomes, golgi apparatus, cytoplasm
How do we know if in image is from a scanning electron microscope and not another type of microscope?
It produces a 3D image!
Phloem is responsible for sending sugars and nutrients (big big molecules) from the "source" (low solute concentration) to "sink" (high solute concentration).
Active Transport - because it is going against the concentration gradient which means this will require energy.
What are the four points of cell theory?
1. Cells come from other cells
2. Cells are the smallest unit of life
3. All living things are made up from cells
4.
What is 670 micrometres in millimeters?
0.67 mm
What do the chloroplast and mitochondria do, and what process are they involved in?
Mitochondria provides energy for the cell through cell resp. Chloroplasts help the plant with photosynthesis which is a necessary process for plants.