Anatomy and Physiology Musculoskeletal System 2 — Questions and Answers
Question 1: Which bone forms the posterior portion of the hard palate?
- Palatine bone (Correct answer)
- Maxilla
- Vomer
- Zygomatic bone
Correct answer: Palatine bone
The palatine bone forms the posterior one-third of the hard palate, while the maxilla forms the anterior two-thirds.
Question 2: What is the term for the connective tissue sheath surrounding an individual muscle fascicle?
- Perimysium (Correct answer)
- Epimysium
- Endomysium
- Sarcolemma
Correct answer: Perimysium
The perimysium is the connective tissue layer that surrounds each fascicle, a bundle of muscle fibers.
Question 3: Which cells are responsible for bone formation?
- Osteoblasts (Correct answer)
- Osteoclasts
- Osteocytes
- Chondroblasts
Correct answer: Osteoblasts
Osteoblasts synthesize and deposit the bone matrix (osteoid) and are the primary cells responsible for new bone formation.
Question 4: At what joint does the radius articulate with the carpal bones of the wrist?
- Radiocarpal joint (Correct answer)
- Ulnocarpal joint
- Radioulnar joint
- Carpometacarpal joint
Correct answer: Radiocarpal joint
The radiocarpal joint is the main wrist joint where the distal radius articulates with the proximal row of carpal bones.
Question 5: What is the functional unit of skeletal muscle contraction?
- Sarcomere (Correct answer)
- Myofibril
- Muscle fiber
- Motor unit
Correct answer: Sarcomere
The sarcomere is the basic contractile unit of skeletal muscle, extending from one Z-line to the next.
Question 6: Which type of bone marrow is responsible for hematopoiesis (blood cell production) in adults?
- Red bone marrow (Correct answer)
- Yellow bone marrow
- Compact bone
- Cancellous bone
Correct answer: Red bone marrow
Red bone marrow contains hematopoietic stem cells and is the site of blood cell production in adults, found primarily in flat and irregular bones.
Anatomy and Physiology Musculoskeletal System 2
Which bone forms the posterior portion of the hard palate?