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Cells Outline - School Essays

Cells Outline

Cells & Microscopes

Microscopes
Definitions:
* Magnification: to make something appear larger than it's actual size often through use of a lens or microscope.
* Contrast: the ability to see differences between structures due to differences in their capacity to absorb light
* Resolution: the ability to distinguish between two structures that are close together
Field of View:
* 1 micrometer = 0.001 millimeters
* mm um
+ mm x 1000
* um mm
+ um / 1000

Size Estimation:

Parts of a Cell

* Nucleus
+ Contains DNA
+ Directs all cellular activity
+ Surrounded by the nuclear envelope which has pores that allow for the ...

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in the cytoplasm
+ Site of amino acid assembly into proteins
* Golgi Apparatus (Golgi Body)
+ Receives substances from the endoplasmic reticulum and then packages them for transport out of the cell
* Lysosomes
+ Only found in animal cells
+ Membrane bound "sacs" in the cell in which digestion can occur
+ Defends against invading bacteria
+ Controls destructed cells and digestion of certain tissues
+ Known as lytic vacuole in plants
* Mitochondria
+ Reactions occur here to convert chemical energy (sugars) into energy the cell can use
+ Process is called cellular respiration
+ "Powerhouse of the cell"
* Cell Membrane
+ Protective barrier for the cell
+ Allows the transport of needed materials to the cell and waste materials out of the cell
+ Important for cell interaction and communication
* Centrioles
+ Found only in animal cells
+ Tiny fibers that migrate to opposite poles of a cell
+ Makes special fibers to assist with cell division
* ...

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PAPER DETAILS

Added: 11/11/2013 11:18:50 AM
Submitted By: captainswan
Category: Biology
Type: Free Paper
Words: 296
Pages: 2

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