Free Scientist in Histotechnology - HTL(ASCP) Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Scientist in Histotechnology - HTL(ASCP) practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1Which microscopic finding is characteristic of crush artifact in a lymphoid tissue specimen?

   1. A. Dark, distorted nuclei, some elongated and intensely basophilic
   2. B. Brown-black granules concentrated around erythrocytes
   3. C. Poor nuclear detail with bacteria in central vessels
   4. D. Unstained central tissue surrounded by a fixed rim

   Answer: A

   Explanation: Leica describes crush artifact as "dark, distorted cell nuclei, some of which are extremely elongated and intensely basophilic." This identifies the nuclear distortion caused by mechanical trauma.

   Reference: Steps to Better Specimen Collection and Transport — Avoid Mechanical Trauma, image description

2. 2A small liver specimen was processed on an excessively long ethanol/xylene cycle. What tissue consistency is most consistent with this error?

   1. A. Crisp and brittle
   2. B. Sludgy and greasy
   3. C. Soft from retained water
   4. D. Shrunken back within the wax

   Answer: A

   Explanation: Leica's troubleshooting guide says "The tissue is likely to be over-processed" for crisp, crunchy, or brittle tissue. The long cycle in the stem supports over-processing.

   Reference: Difficult Blocks and Reprocessing — Problem 1. Crisp, crunchy or brittle tissue

3. 3When orienting a skin specimen for routine histology, which anatomical boundary must usually be visible in each section for diagnosis?

   1. A. Dermal-epidermal junction
   2. B. Papillary-reticular dermal junction
   3. C. Dermal-subcutaneous junction
   4. D. Basal-spinous epidermal junction

   Answer: A

   Explanation: Leica states "The pathologist must be able to see the dermal-epidermal junction in each tissue section". Accurate skin orientation preserves this diagnostic boundary.

   Reference: Dermatopathology for the Histology Lab — Introduction, skin orientation

4. 4What structural information does routine H&E staining provide when a pathologist first examines a tissue section?

   1. A. The arrangement of cells and visible nuclear and cytoplasmic features
   2. B. The exact DNA sequence of a suspected tumor clone
   3. C. The concentration of a single antigen in the entire specimen
   4. D. The live metabolic rate of the tissue before excision

   Answer: A

   Explanation: The guide says H&E shows "the organization (or disorganization) of the cells" and "nuclear changes typically seen in cancer." These morphological features, rather than molecular quantitation, are the information requested.

   Reference: An Introduction to Routine and Special Staining — Why H&E Staining is Routine

5. 5A histology worker needs hazard and protective information for formaldehyde in the work area. Where must the employer make its safety data sheet available?

   1. A. Readily accessible during the work shift in the work area
   2. B. Only at an offsite corporate office
   3. C. Only after the annual safety inspection
   4. D. Only with the next chemical shipment

   Answer: A

   Explanation: For laboratories, OSHA requires that received SDSs be "readily accessible during each workshift to laboratory employees when they are in their work areas." Offsite or delayed access does not meet this requirement.

   Reference: OSHA Hazard Communication Standard, 29 CFR 1910.1200 — 29 CFR 1910.1200(b)(3)(ii)

6. 6Which microscopic pattern in an unfixed liver specimen is most consistent with a prolonged delay before fixation?

   1. A. Poorly defined nuclei and imprecise cytoplasmic detail
   2. B. Dark elongated nuclei compressed by forceps
   3. C. Brown-black formalin pigment near erythrocytes
   4. D. Crisp nuclear and cytoplasmic boundaries

   Answer: A

   Explanation: The collection guide reports "poorly defined nuclei and imprecise cytoplasmic detail" after an extended delay before fixation. Crush, acidic formalin pigment, and well-preserved detail have different causes.

   Reference: Steps to Better Specimen Collection and Transport — Avoid Delayed Fixation, liver image description

7. 7A paraffin block shows tissue receding from the surrounding wax after sectioning, and processing was incomplete. Which mechanism explains the delayed recession?

   1. A. Residual processing solvent evaporates from underprocessed tissue
   2. B. Paraffin cools and contracts without any residual solvent
   3. C. Formalin reacts only after the wax block is formed
   4. D. Tissue absorbs moisture from the air after sectioning

   Answer: A

   Explanation: Leica states "Under-processed tissue shrinks back into the block due to evaporation of residual solvent." Recession of tissue within wax points to incomplete solvent displacement.

   Reference: Difficult Blocks and Reprocessing — Problem 2. Shrunken tissue

8. 8A full-thickness skin block combines which three tissue layers with different cutting properties?

   1. A. Epidermis, dermis, and adipose tissue
   2. B. Epidermis, medulla, and cartilage
   3. C. Dermis, renal cortex, and adipose tissue
   4. D. Mucosa, muscularis, and serosa

   Answer: A

   Explanation: The Leica dermatopathology teaching material identifies "epidermis, dermis and adipose layers" in a full-thickness skin specimen. Their different consistencies matter during embedding and sectioning.

   Reference: Dermatopathology for the Histology Lab — Introduction, full-thickness skin

9. 9In an H&E section, which cellular component is basophilic because it contains DNA and nucleoprotein?

   1. A. Cytoplasmic collagen fibers
   2. B. The cell nucleus
   3. C. Neutral mucin droplets
   4. D. Extracellular elastic fibers

   Answer: B

   Explanation: The H&E chemistry section identifies the "cell nucleus (which contains DNA and nucleoprotein)" among basophilic structures stained by hematoxylin. The other listed components do not have that nuclear composition.

   Reference: An Introduction to Routine and Special Staining — H&E Chemistry

10. 10Under OSHA's formaldehyde standard, which type of exposure measure is assessed over an eight-hour work period?

    1. A. Time-weighted average
    2. B. Fifteen-minute short-term exposure limit
    3. C. Instantaneous peak concentration only
    4. D. Annual cumulative exposure

    Answer: A

    Explanation: OSHA defines the 0.75 ppm formaldehyde limit "as an 8-hour time-weighted average (TWA)." The short-term limit uses a different 15-minute window.

    Reference: OSHA Hospital Laboratory Formaldehyde — Requirements under OSHA's Standards, 29 CFR 1910.1048(c)(1)