quiz 3

if threads are layered from top to bottom, brown, green, red, which layer will come into focus first if using the microscope properly

brown

list several types of microscopes

compound light microscope stereomicroscope transmission and scanning electron microscopes

if the amount of light passing through the condenser needs to be decreased, what microscope part should be adjusted

diaphragm control lever

if a slide is being viewed with the high-power objective, which adjustment knob should be used to sharpen the focus

fine-adjustment knob

what is used to improve contrast when viewing clear portions of cells

heavy metal salts

which objective should be in place when the microscope is put away

lowest- power objective

what is the name for the lenses located near the eye

ocular lenses

what word describes a microscope that remains in focus when the objective lenses are changed

parfocal

which term describes the minimal distance between two objects required to distinguish them as two separate objects

resolution

what kind of microscope would be used to study a whole or opaque object

stereomicroscope

what are the differences between a stereomicroscope and a compound light microscope

stereomicroscope is used for dissecting and is designed to study entire objects in 3D at low magnification and the compound light microscope is used for examining small or thinly sliced sections of objects under higher magnification.

what does the term compound mean

the term compound refers to the use of two sets of lenses

if the total magnification of a slide is 400X and the ocular lenses are 10X, what is the magnifying power of the objective being used

40X

what is the difference between a longitudinal section and a cross section of an object

Longitudinal section- a lengthwise cut showing the cilia at the top of the cell cross section- a crosswise cut shows only the interior where the cut is made