Lab final , Homework sheets

What should be adjusted if two overlapping images, instead of only, are seen when looking through a microscope?

interpupillary control

What converts for curvature in a field so that a flat field with uniform focus is seen?

spheric correction ocular lens

Who is responsible for laboratory employee safety?

-OSHA -employer -employee

What is compliance?

adherence to all applicable laws, rules and regulations, as well as internal policies that govern a business

Koehler illumination does this

adjusts for even light across the field

What is the best substance to use for cleaning oil from microscope objectives?

alcohol-based products

Which lab specimens must be treated with standard (universal) precautions?

all human blood and body fluids

You should wear a face shield or eye goggles when?

cleaning up an acetic acid spill

ocular x objective=

total magnification

What is the purpose of the blue filter when using tunston- halogen microscope light?

eliminate yellow color

What can increase the resolution of an object under the microscope?

enlarging the NA of the objective lens

Which microscope procedure requires high contrast and lower light?

examining unstained objects e.g urine sediment

The most frequent cause of needle punctures is

improper disposal of phlebotomy equipment

Where should the condenser be located when using the 100x oil objective?

in highest position

Which procedure is safe from the production of an aerosol mist?

manual differentials on blood smears

What is the best source of information regarding the nature of a chemical and its hazards?

material safety data sheets

What is the most likely reason for cells on a hemocytometer appearing fuzzy when switching from low power to the 40x objective?

oil on the 40x lens

How should a microscope be carried?

one hand under the base and the other around the arm

An object is brought into focus using the 10x objective lens. When the 40x objective lens is moved into position, only a minor adjustment is required to bring it into focus. What is the term used to describe lenses with this feature?

parfocal

What type of microscope helps in the identification of urine crystals?

polarized light

Universal standard precautions written by OSHA are designed to:

protect employees from possible contamination

Proper specimen collection and patient satisfaction are components of

quality assurance

In regard to fire safety a written fire protection and response plan must be in place and tested how often?

quarterly

The ability to distinguish between two objects that are situated close to one another, as separate entities is

resolution

Why is it not advisable to interchange one ocular lens with another from a different brand of microscope?

the two optical lenses in a microscope are optically matched with one another

An image viewed on the microscope is clearly seen under both the 10x and 40x objectives but is not visible under the 100x objective. What is the most likely reason for this?

there is no oil on the slide

What immersion oil is used most commonly in hematology?

type B

What is the first and most important thing to do before repairing electrical laboratory equipment?

unplug it

Where must fluid resistant lab coats be worn?

walking to a patient room to collect a sample

Safety training must be provided and documented at time of initial assignment and how often thereafter?

yearly