😀 EASY

This quiz includes questions covering bone structure, formation, growth and repair. Enjoy!

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Bone Structure

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Question 1
Which of these is not a feature of cortical bone?
A
Resists stresses produced by weight and movement
B
Reduces weight of bones
C
Provides support and protection to spongy bone in the centre
D
Strong but heavy
E
Forms the outer layer of all bones
Question 2
What is the development of bone cells?
A
Mesenchymal stem cells--> osteoprogenitor cells--> osteoblast-->osteocyte
B
Mesenchymal stem cells--> osteoblast--> osteoprogenitor cells-->osteocyte
C
Osteocyte--> osteoprogenitor cells--> osteoclast--> mesenchymal stem cells
D
Mesenchymal stem cells--> osteoprogenitor cells--> osteoclast-->osteocyte
E
Osteocyte--> osteoprogenitor cells--> osteoblast-->mesenchymal stem cells
Question 3
Which of the following is not true of osteocytes?
A
Involved in calcium homeostasis
B
Occupy lacunae surrounded by bone matrix
C
Gap junctions between dendritic processes of osteocytes allow transfer of ions and nutrients
D
No cell division
E
Secrete matrix
Question 4
Describe the process of bone resorption.
A
Osteocytes move to the area that needs to be resorbed. They form a tight seal on the bone with their ruffled border on the bone surface, and release enzymes (to breaks down organic portion of bone matrix) and hydrochloric acid (to dissolve inorganic salts of bone matrix).
B
Osteoblasts move to the area that needs to be resorbed. They form a tight seal on the bone with their ruffled border on the bone surface, and release enzymes (to breaks down organic portion of bone matrix) and hydrochloric acid (to dissolve inorganic salts of bone matrix).
C
Osteoclasts move to the area that needs to be resorbed. They form a tight seal on the bone with their ruffled border on the bone surface, and release enzymes (to breaks down organic portion of bone matrix) and hydrochloric acid (to dissolve inorganic salts of bone matrix).
D
Osteoclasts move to the area that needs to be resorbed. They form a tight seal on the bone with their ruffled border on the bone surface, and release osteoblasts (to breaks down organic portion of bone matrix) and hydrochloric acid (to dissolve inorganic salts of bone matrix).
E
Osteoblasts move to the area that needs to be resorbed. They form a tight seal on the bone with their ruffled border on the bone surface, and release osteoclasts (to breaks down organic portion of bone matrix) and hydrochloric acid (to dissolve inorganic salts of bone matrix).
Question 5
Which is true of RANKL (receptor activator of nuclear factor kappa B ligand)?
A
Activation leads to bone formation
B
Bind to RANK on osteoblasts for activation
C
Binds to RANK on osteoclasts for activation
D
Produced by osteocytes
E
Produced by osteoclasts
Question 6
Which of the following is not a process of intramembranous ossification?
A
Membrane of mesenchyme differentiates directly into osteogenic cells
B
The matrix develops into spongy/trabecular bone around the capillaries
C
Osteoblasts cluster together and secrete organic bone matrix
D
Mesenchyme differentiates to cartilage which then differentiates into osteogenic cells
E
The bone matrix becomes calcified
Question 7
Which of the following is not a zone in the epiphyseal growth plate?
A
Ossification (osteogenic) zone
B
Growth (proliferation) zone
C
Hypertrophic zone
D
Resting zone
E
Degenerative (Reabsorption) zone
Question 8
Where does a Salter-Harris Fracture occur?
A
Metaphysis
B
Epiphysis
C
Diaphysis
D
Cortical bone
E
Trabecular bone
Question 9
Which population does Greenstick fractures commonly occur in?
A
Children
B
Adolescences
C
Middle age
D
Elderly
E
Athletes
Question 10
What is the order of the fracture healing stages?
A
Haematoma--> Callus-->Granulation tissue--> Woven bone--> Lamellar bone--> Remodelling
B
Haematoma-->Granulation tissue--> Callus--> Woven bone--> Lamellar bone--> Remodelling
C
Haematoma-->Granulation tissue--> Callus--> Weak bone--> Large bone--> Remodelling
D
Haematoma-->Granulation tissue--> Callus--> Weak bone--> Lamellar bone--> Remodelling
E
Callus-->Granulation tissue--> Haematoma--> Woven bone--> Lamellar bone--> Remodelling
Question 11
What are the three factors that aid fracture healing?
A
Wound opening Space between bones Adequate blood supply
B
Stability of the fracture Infection Adequate blood supply
C
Movement of fracture Apposition of bone ends Adequate blood supply
D
Stability of the fracture Apposition of bone ends Adequate blood supply
E
Infection Apposition of bone ends Adequate blood supply
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