Parallel curving ridges of dermis that shape the overlying epidermis into friction ridges
A) are associated with thin skin.
B) improve the grip of the hands.
C) decrease friction on surfaces where they are located.
D) are caused by the pattern of the reticular layer of the dermis.
E) tend to make the surface smooth.

Question

Quizplus · Accepted Answer

Parallel curving ridges of dermis shape the overlying epidermis into friction ridges, which improve the grip of the hands by increasing friction, not decreasing it. These ridges are not associated with thin skin, nor do they make the surface smooth. They are caused by the pattern of the underlying dermal papillae, not the reticular layer of the dermis.

Parallel Curving Ridges of Dermis That Shape the Overlying Epidermis