GENERAL HISTOLOGY

EPITHELIUM

EPITHELIAL TISSUES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Chemicals that are used to make the colorless parts of the cell more visible under the microscope.
A
stains (iodine, methylene blue)
B
acids (hydrochloric, nitric)
C
water (distilled, tap)
D
oil (immersion)
Explanation: 

Detailed explanation-1: -Identification of Microorganisms: Methylene blue is a dye frequently employed by biologists to aid in the identification of microorganisms. As the bacteria are nearly colourless, a biologist can detect bacterial forms and structures by adding a drop or two of methylene blue to a microscope slide.

Detailed explanation-2: -Methylene blue-stains animal cells to make nuclei more visible. Neutral/Toluylene red-stains nuclei red and may be used on living cells.

Detailed explanation-3: -The methylene blue stain makes nuclei more visible although it stains both nuclei and cytoplasm; the eosin mainly colors the cytoplasm and cell membranes.

Detailed explanation-4: -A microscope is an instrument that is used to magnify small objects. Some microscopes can even be used to observe an object at the cellular level, allowing scientists to see the shape of a cell, its nucleus, mitochondria, and other organelles.

Detailed explanation-5: -Methylene blue stain is a solution used to highlight certain cell parts of animal, bacteria, and blood tissue specimens. This stain is a 1% aqueous solution, and it’s especially useful for microscope slide preparation.

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