MCAT Biology Question 162: Answer and Explanation
Home > MCAT Test > MCAT biology practice tests
Test Information
- Use your browser's back button to return to your test results.
- Do more MCAT biology practice tests.
Question: 162
12. Which of the following statements regarding the periosteum is INCORRECT?
- A. The periosteum serves as a site of attachment of bone to muscle.
- B. Cells of the periosteum may differentiate into osteoblasts.
- C. The periosteum is a fibrous sheath that surrounds long bones.
- D. The periosteum secretes fluid into the joint cavity.
Correct Answer: D
Explanation:
The periosteum, a fibrous sheath that surrounds long bones, is the site of attachment to muscle tissue. Some periosteum cells are capable of differentiating into bone-forming cells called osteoblasts. This eliminates choices (A), (B), and (C). It is the synovium that secretes fluid into the joint cavity (joint space), not the periosteum, making choice (D) the correct answer.