Prior to Staining,smears of Microorganisms Are Heat-Fixed in Order to

question 20

Multiple Choice

Prior to staining,smears of microorganisms are heat-fixed in order to

• A)allow eventual visualization of internal structures.
• B)ensure removal of dust particles from the slide surface.
• C)attach it firmly to the slide.
• D)create small pores in cells that facilitates binding of stain to cell structures.

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Definitions:

Sarcomere

The basic unit of a muscle's cross-striated myofibril and the site of muscle contraction.

Myofilaments

The filaments of myofibrils, constructed from proteins, primarily actin, and myosin, which are essential for muscle contraction.

I Bands

I Bands are the light-appearing regions of a sarcomere in muscle fibers, reflecting areas where thin filaments do not overlap with thick filaments.

Z Lines

The boundaries in a striated muscle fiber that separate one sarcomere from the next, crucial for muscle contraction.