Question 40
Domain 1: English Language ProficiencyThe friction skin furrows of fingerprints are usually visible.
Correct answer: D
Explanation
Friction skin on fingerprints has alternating ridges and grooves. The visible lines are the raised ridges, while the furrows are the recessed grooves between them, so “grooves” fits the description of the furrows.
Why each option is right or wrong
A. follicles
Follicles are hair-root structures in skin, not the surface furrows of fingerprints.
B. wrinkles
Wrinkles are larger skin folds from aging or movement, not normal fingerprint furrows.
C. circles
Circles describe a shape pattern, not the anatomical depressions between fingerprint ridges.
D. grooves
Under standard dermatoglyphic anatomy, friction skin is made up of alternating raised ridges and depressed furrows; the furrows are the recessed channels between the ridges. In fingerprint examination, the visible pattern is therefore described in terms of grooves/furrows rather than the raised ridges, so the term that matches the skin furrows is "grooves."