Chapter 3 - Microscope Flashcards
Objective lenses - 10x
Increase magnification ( 10x to 10x )
Stage clips
2 clips that hold slide / specimen
Objective lenses - 4x
increase magnification ( 4x to 10x )
Diaphragm
Controls amount of light on slide / specimen
Coarse adjustment knob
moves the stage up & down for focusing your image ( quickly )
Ocular lens - 10x
magnifies the specimen image
Stage
Platform that holds slide / specimen
Body tube
tube that holds the objective lenses & ocular lens at a proper distance
Fine adjustment
moves stage ( slightly ) to sharpen image
Unified cell theory
biological concept that states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells
Plasma membrane
a phospholipid bilayer with embedded or attached proteins
Nose piece
holds the objective lenses & can be turned to increase magnification
Base
supports the microscope
Fluid mosaic model
model of the structure of the plasma membrane as a mosaic of components
Microscope
instrument that magnifies an object
Light source
Source where light travels through
Cytosol
gel-like material of the cytoplasm in which cell structures are suspended
Prokaryotic cell
unicellular organism that lacks a nucleus
Eukaryotic cell
cell that has a membrane-bound nucleus and several other membrane-bound compartments or sacs
Objective lenses - 40x
Increase magnification ( 40x to 10x )
Arm & how to hold it
used to support microscope
When carried hold : body tube , nose piece , & objective lenses
