BIOL251 Human Anatomy & Physiology I
w/Lab 2026 | Module 4 Exam Review
|200 Questions and Answers with
Rationale
Section 1: Skeletal System & Bone Tissue (Questions 1-50)
Question 1
Which type of bone cell is responsible for bone formation (building bone matrix)?
A) Osteoclast
B) Osteoblast
C) Osteocyte
D) Osteogenic cell
Correct Answer: B) Osteoblast
,*Rationale: Osteoblasts are the bone-building cells that synthesize and secrete the
organic matrix of bone (osteoid) and are responsible for mineralization. Osteoclasts break
down bone (resorption), osteocytes are mature bone cells that maintain the matrix, and
osteogenic cells are stem cells that differentiate into osteoblasts.
Question 2
Which bone cell is a mature cell that maintains the bone matrix?
A) Osteoblast
B) Osteocyte
C) Osteoclast
D) Chondrocyte
Correct Answer: B) Osteocyte
*Rationale: Osteocytes are mature bone cells derived from osteoblasts that have become
entrapped in the matrix they secreted. They maintain the bone matrix and communicate
with other bone cells via canaliculi. Osteoblasts build bone, osteoclasts resorb bone, and
chondrocytes are cartilage cells.
Question 3
Bone resorption, the breakdown of bone matrix, is the primary function of which
cell type?
A) Osteoblasts
B) Osteocytes
C) Osteoclasts
D) Osteogenic cells
,Correct Answer: C) Osteoclasts
*Rationale: Osteoclasts are large, multinucleated cells derived from hematopoietic stem
cells that are responsible for bone resorption. They secrete acids and proteolytic enzymes
that break down bone matrix, releasing calcium and phosphate into the bloodstream. This
process is essential for bone remodeling and calcium homeostasis.
Question 4
The shaft of a long bone is known as the:
A) Epiphysis
B) Metaphysis
C) Diaphysis
D) Periosteum
Correct Answer: C) Diaphysis
*Rationale: The diaphysis is the long, tubular main shaft of a long bone composed
primarily of compact bone. The epiphyses are the expanded ends, the metaphysis is the
region between the diaphysis and epiphysis containing the epiphyseal plate, and the
periosteum is the fibrous membrane covering the outer surface of bone.
Question 5
The lateral malleolus, which forms the outer bump of the ankle, is part of which
bone?
A) Tibia
B) Talus
C) Fibula
D) Calcaneus
, Correct Answer: C) Fibula
*Rationale: The lateral malleolus is the distal projection of the fibula that forms the
prominent outer bump of the ankle. It articulates with the talus and provides lateral
stability to the ankle joint. The tibia forms the medial malleolus, the talus is the ankle
bone that articulates with both malleoli, and the calcaneus is the heel bone.
Question 6
What is the primary function of the transverse foramina found in cervical
vertebrae?
A) Attachment for ribs
B) Passage for vertebral arteries and veins
C) Support for the skull
D) Attachment for back muscles
Correct Answer: B) Passage for vertebral arteries and veins
*Rationale: The transverse foramina are unique to cervical vertebrae and provide passage
for the vertebral arteries and veins that supply blood to the brain. This is a distinguishing
feature of cervical vertebrae that is not found in thoracic or lumbar vertebrae.
Question 7
Which region of the vertebral column contains costal facets for rib articulation?
A) Cervical
B) Thoracic
w/Lab 2026 | Module 4 Exam Review
|200 Questions and Answers with
Rationale
Section 1: Skeletal System & Bone Tissue (Questions 1-50)
Question 1
Which type of bone cell is responsible for bone formation (building bone matrix)?
A) Osteoclast
B) Osteoblast
C) Osteocyte
D) Osteogenic cell
Correct Answer: B) Osteoblast
,*Rationale: Osteoblasts are the bone-building cells that synthesize and secrete the
organic matrix of bone (osteoid) and are responsible for mineralization. Osteoclasts break
down bone (resorption), osteocytes are mature bone cells that maintain the matrix, and
osteogenic cells are stem cells that differentiate into osteoblasts.
Question 2
Which bone cell is a mature cell that maintains the bone matrix?
A) Osteoblast
B) Osteocyte
C) Osteoclast
D) Chondrocyte
Correct Answer: B) Osteocyte
*Rationale: Osteocytes are mature bone cells derived from osteoblasts that have become
entrapped in the matrix they secreted. They maintain the bone matrix and communicate
with other bone cells via canaliculi. Osteoblasts build bone, osteoclasts resorb bone, and
chondrocytes are cartilage cells.
Question 3
Bone resorption, the breakdown of bone matrix, is the primary function of which
cell type?
A) Osteoblasts
B) Osteocytes
C) Osteoclasts
D) Osteogenic cells
,Correct Answer: C) Osteoclasts
*Rationale: Osteoclasts are large, multinucleated cells derived from hematopoietic stem
cells that are responsible for bone resorption. They secrete acids and proteolytic enzymes
that break down bone matrix, releasing calcium and phosphate into the bloodstream. This
process is essential for bone remodeling and calcium homeostasis.
Question 4
The shaft of a long bone is known as the:
A) Epiphysis
B) Metaphysis
C) Diaphysis
D) Periosteum
Correct Answer: C) Diaphysis
*Rationale: The diaphysis is the long, tubular main shaft of a long bone composed
primarily of compact bone. The epiphyses are the expanded ends, the metaphysis is the
region between the diaphysis and epiphysis containing the epiphyseal plate, and the
periosteum is the fibrous membrane covering the outer surface of bone.
Question 5
The lateral malleolus, which forms the outer bump of the ankle, is part of which
bone?
A) Tibia
B) Talus
C) Fibula
D) Calcaneus
, Correct Answer: C) Fibula
*Rationale: The lateral malleolus is the distal projection of the fibula that forms the
prominent outer bump of the ankle. It articulates with the talus and provides lateral
stability to the ankle joint. The tibia forms the medial malleolus, the talus is the ankle
bone that articulates with both malleoli, and the calcaneus is the heel bone.
Question 6
What is the primary function of the transverse foramina found in cervical
vertebrae?
A) Attachment for ribs
B) Passage for vertebral arteries and veins
C) Support for the skull
D) Attachment for back muscles
Correct Answer: B) Passage for vertebral arteries and veins
*Rationale: The transverse foramina are unique to cervical vertebrae and provide passage
for the vertebral arteries and veins that supply blood to the brain. This is a distinguishing
feature of cervical vertebrae that is not found in thoracic or lumbar vertebrae.
Question 7
Which region of the vertebral column contains costal facets for rib articulation?
A) Cervical
B) Thoracic
