Tissue types and function · USMLE Step 1

What is the primary function of epithelial tissue in the body?

  1. Structural support, insulation, and binding of organs
  2. Transmission and integration of electrical signals
  3. Contraction, movement, and force generation
  4. Covering surfaces, absorption, secretion, and protection
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Correct answer: Covering surfaces, absorption, secretion, and protection

Epithelial tissue forms continuous layers that cover body surfaces and line cavities; it functions in protection, absorption (e.g., in the gut), secretion (e.g., glands), and forming barriers.

Difficulty: Medium Question 2 of 22

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