Question

question 14

a needle would pierce the epidermal layers of the forearm in which order?

a - corneum, granulosum, spinosum, basale
b - basale, spinosum, granulosum, lucidum, corneum
c - granulosum, basale, spinosum, corneum
d - basale, spinosum, granulosum, corneum

Explanation:

Identify skin type of forearm

Using the Integumentary System Anatomy knowledge point

• The forearm is covered by thin skin.
• Thin skin lacks the stratum lucidum layer.
• It contains four epidermal layers.

Determine direction of penetration

• A needle piercing the skin travels from superficial to deep.
• The outermost layer is the stratum corneum.
• The deepest layer is the stratum basale.

Sequence the layers from superficial to deep

• Layer 1 (outermost): stratum corneum.
• Layer 2: stratum granulosum.
• Layer 3: stratum spinosum.
• Layer 4 (deepest): stratum basale.

Match with the options

• Option A: corneum, granulosum, spinosum, basale (Correct).
• Option B: basale to corneum (Deep to superficial, incorrect).
• Option C: incorrect order.
• Option D: deep to superficial, thin skin layers (Incorrect).

Answer:

• (A) corneum, granulosum, spinosum, basale (Correct answer)
• (B) basale, spinosum, granulosum, lucidum, corneum
• (C) granulosum, basale, spinosum, corneum
• (D) basale, spinosum, granulosum, corneum