Bone Structure and Blood Supply Quiz

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Questions and Answers

Why is cartilage considered weaker than bone?

  • Due to being avascular and having limited healing ability (correct)
  • As it produces ECM at a slower rate
  • Because it contains more chondrocytes
  • Because it has a rich blood supply for faster healing

What is the main function of bones in the human body?

  • To store and release minerals like calcium and phosphate (correct)
  • To provide flexibility and resilience
  • To generate heat
  • To produce insulin

Which type of bone marrow is responsible for hematopoiesis?

  • Red marrow (correct)
  • Elastic marrow
  • Yellow marrow
  • Compact marrow

What type of bone formation develops flat bones of the skull, some facial bones, the mandible, and central portions of clavicle?

<p>Intramembranous ossification (D)</p> Signup and view all the answers

Where do nutrient arteries typically enter a bone?

<p>At the growth end of the bone (D)</p> Signup and view all the answers

What covers the vital organs such as ribs, skull, and vertebral column for protection?

<p>Compact bone (C)</p> Signup and view all the answers

Which type of bone lamellae is associated with concentric plates of bone forming osteons around the central canal?

<p>Concentric lamellae (B)</p> Signup and view all the answers

In bones, what strengthens the extracellular matrix by depositing minerals?

<p>Calcification (B)</p> Signup and view all the answers

What is the term for the formation and development of bone?

<p>Ossification (A)</p> Signup and view all the answers

Why is cartilage considered a precursor model for bone growth?

<p>As it serves as a template for bone formation during fetal development (B)</p> Signup and view all the answers

Which layer gives rise to skeletal, cardiac, smooth muscles, bone, blood, dermis, kidneys, ureters, adrenal cortex, and dura mater during development?

<p>Mesoderm (B)</p> Signup and view all the answers

Which type of artery enters the periosteum in the diaphysis through interosteonic canals?

<p>Periosteal artery (C)</p> Signup and view all the answers

What is the primary role of vitamin D in the body?

<p>Promotes calcium and phosphorus absorption in the intestine (A)</p> Signup and view all the answers

Which type of fracture is characterized by the bone being bent with one side fractured and the other side intact?

<p>Greenstick fracture (D)</p> Signup and view all the answers

During which phase of bone repair does the formation of fibrocartilaginous callus occur?

<p>Restorative Phase (B)</p> Signup and view all the answers

Which age group experiences a stage where bone resorption is greater than bone deposition?

<p>Middle age adults (C)</p> Signup and view all the answers

In what type of fracture does one end of the broken bone get driven into the other end?

<p>Impacted fracture (C)</p> Signup and view all the answers

Which vitamin deficiency can lead to decreased bone density due to the impaired synthesis of bone proteins?

<p>Vitamin K deficiency (C)</p> Signup and view all the answers

What is the main function of osteoclasts in bone remodeling?

<p>Removal of Ca2+ and collagen fibers (A)</p> Signup and view all the answers

Which type of bone is replaced at a higher rate annually?

<p>Spongy bone at 20% (C)</p> Signup and view all the answers

What is the impact of orthodontic braces on bone remodeling?

<p>They increase stress on the bones (B)</p> Signup and view all the answers

In osteoporosis, what is one factor that contributes to the condition?

<p>Decreased hormone production (A)</p> Signup and view all the answers

Which hormone stimulates osteoblast activity in adults?

<p>Thyroid hormone (A)</p> Signup and view all the answers

What is the role of Vitamin C in bone health?

<p>Promotes collagen synthesis (A)</p> Signup and view all the answers

What is the primary function of osteoprogenitors?

<p>Develop into mature bone cells (B)</p> Signup and view all the answers

Which of the following bone cells is responsible for resorbing bone matrix?

<p>Osteoclasts (B)</p> Signup and view all the answers

What is the main inorganic component responsible for providing rigidity to bone?

<p>Calcium phosphate [Ca3(PO4)2] (A)</p> Signup and view all the answers

Where are osteocytes located within bone tissue?

<p>In lacunae, communicating via canaliculi (B)</p> Signup and view all the answers

Which type of bone tissue is abundant in epiphysis and supports/protects red bone marrow?

<p>Spongy bone (D)</p> Signup and view all the answers

What is the basic structural and functional unit of mature compact bone?

<p>Osteon (B)</p> Signup and view all the answers

During endochondral ossification, what happens as chondrocytes hypertrophy?

<p>They start to die due to calcification of ECM (A)</p> Signup and view all the answers

Which stage of endochondral ossification involves the development of the primary ossification center?

<p>Development of medullary cavity (D)</p> Signup and view all the answers

What triggers osteoprogenitor cells to form osteoblasts during endochondral ossification?

<p>Nutrient artery penetration (D)</p> Signup and view all the answers

In endochondral ossification, what type of bone is formed when osteoblasts develop spongy bone around the primary ossification center?

<p>Cancellous bone (C)</p> Signup and view all the answers

Which type of growth in the cartilage model leads to an increase in width?

<p>Appositional growth (A)</p> Signup and view all the answers

When does the diaphysis start to calcify first during endochondral ossification?

<p>6th-8th week (C)</p> Signup and view all the answers

Which structure breaks down trabeculae and replaces most of the diaphysis with compact bone?

<p>Osteoclasts (B)</p> Signup and view all the answers

Which type of ossification develops flat bones of the skull, some facial bones, the mandible, and central portions of the clavicle?

<p>Intramembranous ossification (A)</p> Signup and view all the answers

Where do metaphyseal arteries supply blood in bones?

<p>Between diaphysis and epiphyseal plate (B)</p> Signup and view all the answers

Which layer of bone gives rise to epithelial tissues during embryonic development?

<p>Endoderm (C)</p> Signup and view all the answers

Where do nutrient arteries typically enter bones?

<p>Periosteum through interosteonic canals (B)</p> Signup and view all the answers

What is the primary nutrient artery pathway that supplies blood to bones away from the growth end?

<p>Nutrient arteries (D)</p> Signup and view all the answers

Which is responsible for forming concentric plates of bone around the central canal, creating osteons?

<p>Concentric lamellae (D)</p> Signup and view all the answers

What is the main source of skeletal, cardiac, and smooth muscles during embryonic development?

<p>Mesoderm (C)</p> Signup and view all the answers

What type of growth in bone length involves the replacement of cartilage by bone on the diaphyseal side of the epiphyseal plate?

<p>Interstitial growth (B)</p> Signup and view all the answers

Which zone of the epiphyseal plate is characterized by large chondrocytes undergoing mitosis, often forming a 'stack of coins' appearance?

<p>Zone of proliferating cartilage (C)</p> Signup and view all the answers

What type of bone growth occurs through the deposition of concentric lamellae around blood vessels by osteoblasts?

<p>Appositional growth (A)</p> Signup and view all the answers

Which type of cells differentiate into osteoblasts to secrete collagen fibers and organic molecules for appositional growth in bones?

<p>Periosteal cells (D)</p> Signup and view all the answers

In bone remodeling, which cells destroy bone tissue in the medullary cavity and contribute to increasing the inner diameter as the outer width grows?

<p>Osteoclasts (C)</p> Signup and view all the answers

Which type of growth contributes to an increase in the width of bones and occurs throughout the lifespan?

<p>Appositional growth (B)</p> Signup and view all the answers

What is the final zone in the epiphyseal plate where minerals are deposited, chondrocytes undergo apoptosis, and bone tissue is formed?

<p>Zone of calcified cartilage (B)</p> Signup and view all the answers

Which type of tissues are bones primarily categorized as?

<p>Connective (C)</p> Signup and view all the answers

Where do chondrocytes, the functional cells of cartilage, reside?

<p>Lacunae (A)</p> Signup and view all the answers

Which function of bones involves the covering and protection of vital organs?

<p>Protection (A)</p> Signup and view all the answers

What is the main source and storage of calcium and phosphates in bones?

<p>Calcification (A)</p> Signup and view all the answers

Which type of bone tissue is more flexible and resilient compared to bone?

<p>Hyaline cartilage (A)</p> Signup and view all the answers

Where does hemopoiesis, the production of new red blood cells, primarily occur in adults?

<p>Red bone marrow (A)</p> Signup and view all the answers

What is the organic component responsible for maintaining bone strength and flexibility?

<p>Collagen fibers (D)</p> Signup and view all the answers

Which bone classification is associated with bones that are longer than they are wide?

<p>Long bones (B)</p> Signup and view all the answers

What is the main role of Vitamin D in bone health?

<p>Facilitates Ca2+ and phosphorus absorption in the intestine (B)</p> Signup and view all the answers

Which type of fracture is characterized by one end of the bone being driven into the other?

<p>Impacted fracture (A)</p> Signup and view all the answers

During which phase of bone repair does the formation of a fibrocartilaginous and bony callus occur?

<p>Restorative Phase (A)</p> Signup and view all the answers

What type of bone fracture is characterized by partial bending of the bone with one side fractured and the other side intact?

<p>Greenstick fracture (C)</p> Signup and view all the answers

Which group experiences a stage where bone resorption exceeds bone deposition?

<p>Middle-aged individuals (C)</p> Signup and view all the answers

What happens during the Bone Remodeling Phase of bone repair?

<p>Osteoclasts absorb dead bone portions (D)</p> Signup and view all the answers

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