A 10% solution of formalin must be made from a stock solution of formaldehyde. The resulting solution would contain how much formaldehyde?

This is a section of aorta that has been stained with the Verhoeff van Gieson (VVG) stain (HP).  The most plausible explanation for the results seen is that the:  66.jpg 

What is the best way to freeze fresh muscle biopsies for EHC analysis?

This symbol would be most appropriately used for: 78.jpg 

This problem was experienced during sectioning; what is the best corrective action that should be taken?  62.jpg 

When observing the results of a Von Kossa stain microscopically, it is noted that the calcium salts are staining a yellow to yellow brown color instead of the expected black. What is a plausible explanation for these results?

This is a photomicrograph of a Gram stain taken from a 36 year old woman who sought medical care for difficulty breathing. She later died from empyema (pus in a body cavity). The reagent responsible for staining the bacteria shown here is:  91.jpg 

Both myelin sheath and nissl substances can be demonstrated by:

Which of the following fixatives do not contain an aldehyde?

Identify the corrective action that would be taken here. 5.jpg