Bone Structure and Functions Quiz
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Questions and Answers

Which part of the long bone articulates with another bone to form a joint?

  • Metaphysis
  • Diaphysis
  • Epiphysis (correct)
  • Periosteum
  • Yellow bone marrow is primarily responsible for producing blood cells.

    False (B)

    What are the two primary types of bone marrow?

    Yellow bone marrow and red bone marrow

    The primary mineral stored in bone is __________.

    <p>calcium</p> Signup and view all the answers

    Match the following functions of bones with their descriptions:

    <p>Protect internal organs = Skull protects the brain Store and release fat = Yellow bone marrow Produce blood cells = Red bone marrow Facilitate movement = Attachment points for muscles</p> Signup and view all the answers

    What is the soft connective tissue inside most bones?

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

    The metaphysis of a long bone is where adipocytes are primarily found.

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

    What is the term used for the formation of blood cells?

    <p>Hematopoiesis</p> Signup and view all the answers

    The ___________ is the hollow chamber within the diaphysis of a long bone.

    <p>medullary cavity</p> Signup and view all the answers

    Which of the following statements about bone functions is correct?

    <p>Bones protect organs and facilitate movement. (B)</p> Signup and view all the answers

    What type of bone is dense and tightly packed?

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

    Osteoclasts are responsible for forming new bone matrix.

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

    What are the two primary components of the bone matrix?

    <p>Collagen fibers and calcium &amp; phosphate salts</p> Signup and view all the answers

    The _____ are the mature bone cells formed from osteoblasts.

    <p>osteocytes</p> Signup and view all the answers

    Match the bone cell type to its function:

    <p>Osteogenic Cells = Stem cells that differentiate into osteoblasts Osteoblasts = Cells that form the bone matrix Osteocytes = Mature bone cells Osteoclasts = Cells that reabsorb old bone</p> Signup and view all the answers

    What age group is primarily affected by Paget’s Disease?

    <p>Over 40 years old (C)</p> Signup and view all the answers

    Spongy bone reduces the weight of bones due to its structure.

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

    What condition results from overactive osteoclasts?

    <p>Paget's Disease</p> Signup and view all the answers

    The primary symptoms of Paget's Disease can include _____ and frequent fractures.

    <p>pain</p> Signup and view all the answers

    Which type of bone is an example of spongy bone?

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

    Which of the following bones are most commonly affected by Paget's disease?

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

    Open fractures involve the bone remaining under the skin without breaking it.

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

    What is the primary difference between open reduction and closed reduction?

    <p>Open reduction requires surgery to realign the bone, while closed reduction does not.</p> Signup and view all the answers

    Reduction involves manipulating the bone back into __________.

    <p>alignment</p> Signup and view all the answers

    Match the type of fracture with its description:

    <p>Open Fracture = Bone breaks through the skin Closed Fracture = Bone is out of alignment but remains under the skin Direct Bone Healing = Osteoblasts &amp; osteoclasts unite broken structures Indirect Bone Healing = Cartilaginous patches form before regeneration</p> Signup and view all the answers

    What type of healing involves direct contact between broken bone ends?

    <p>Direct Bone Healing (A)</p> Signup and view all the answers

    The pelvis is less likely to be affected by Paget's disease compared to the skull.

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

    Name one type of callous involved in bone healing.

    <p>Internal callus or external callus</p> Signup and view all the answers

    In __________ fractures, the bone remains aligned but is still within the skin.

    <p>closed</p> Signup and view all the answers

    What happens during indirect bone healing?

    <p>Patches of cartilage form before regeneration (A)</p> Signup and view all the answers

    Flashcards

    Bone Marrow Function

    Bone marrow is a soft connective tissue inside bones, responsible for producing blood cells (red bone marrow) and storing fat (yellow bone marrow).

    Red Bone Marrow

    The part of bone marrow responsible for creating red blood cells, white blood cells, and platelets.

    Yellow Bone Marrow

    The part of bone marrow primarily composed of fat-storing cells (adipocytes).

    Bone Function: Protection

    Bones protect vital internal organs, such as the brain (skull) and spinal cord (vertebral column).

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    Bone Function: Movement

    Bones provide attachment points for muscles, enabling movement.

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    Bone Function: Support

    Bones provide structural support for the body.

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    Bone Function: Mineral Storage

    Bones store and release essential minerals, including calcium and phosphorus for many bodily functions.

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    Epiphysis

    The end of a long bone, articulating with another bone to form a joint.

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    Diaphysis

    The shaft of a long bone.

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    Periosteum

    The tough, vascular covering tissue around a bone.

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    Compact Bone

    Dense, tightly packed bone tissue with a continuous extracellular matrix.

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    Spongy Bone

    Bone with irregular, thin bony plates. It resists compressive forces and reduces bone weight.

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    Bone Matrix

    The supporting framework of bone, composed of collagen fibers and calcium/phosphate salts.

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    Osteocyte

    Mature bone cell.

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    Osteoblast

    Bone-forming cell that secretes the collagen matrix.

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    Osteoclast

    Bone-resorbing cell.

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    Paget's Disease

    A bone disorder caused by overactive osteoclasts, leading to bone deformities and fractures.

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    Osteogenic Cells

    Stem cells that develop into osteoblasts.

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    Bone Remodeling

    The process where bone is broken down and reformed.

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    Collagen in Bone

    Provides flexibility and framework for bone formation.

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    Open Fracture

    A fracture where the broken bone pierces the skin, exposing the bone to the outside environment. This increases the risk of infection.

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    Closed Fracture

    A fracture where the broken bone remains inside the skin, though it may be misaligned.

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    Reduction (Fracture)

    The process of realigning a fractured bone to its original position.

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    Open Reduction

    A procedure where surgery is used to realign a fractured bone. Often necessary for complex fractures.

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    Closed Reduction

    A non-surgical method of realigning a fractured bone, often using casts or splints.

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    Direct Bone Healing

    A healing process where osteoblasts and osteoclasts directly unite broken bone fragments. The bone forms directly on top of the fracture site.

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    Indirect Bone Healing

    A healing process involving the formation of cartilaginous patches between the fracture fragments before bone regeneration begins.

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    Internal Callus

    A mass of fibrocartilaginous tissue that forms within the fracture site during bone healing.

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    External Callus

    A mass of fibrocartilaginous tissue that forms around the fracture site, stabilizing the broken bone during healing.

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    Why are the Pelvis, Skull, Spine and Legs the most affected by Paget's disease?

    These areas are primarily composed of spongy bone, which has a higher turnover rate and is more susceptible to the disordered bone remodeling in Paget's disease.

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    Study Notes

    Bone Structure and Functions

    • Bones protect internal organs, for example: the skull protects the brain, and the vertebral column protects the spinal cord.
    • Bones store and release fat (yellow bone marrow).
    • Bones produce blood cells (red bone marrow).
    • Bones store and release minerals, including calcium and phosphorus.
    • Bones facilitate movement by providing attachment points for muscles.
    • Bones support the body, acting as a scaffolding.

    Bone Marrow

    • Bone marrow is connective tissue found inside most bones.
    • Yellow bone marrow stores fat (adipocytes) in the form of triglycerides.
    • Red bone marrow forms blood cells (hematopoiesis).
    • Red bone marrow produces red blood cells, white blood cells, and platelets.

    Parts of a Long Bone

    • Epiphysis: The end of a long bone that articulates with another bone (forms a joint).
    • Articular cartilage: Hyaline cartilage covering the epiphysis.
    • Metaphysis: The location of the epiphyseal plate (growth plate) within the intermediate area of a long bone.
    • Diaphysis: The shaft of the long bone.
    • Periosteum: The tough, vascular covering of the bone tissue.
    • Medullary cavity: A hollow chamber located within the diaphysis containing bone marrow tissue.

    Bone Classification

    • Long bones: Cylinder-like and longer than they are wide (e.g., femur, tibia, fibula, humerus, ulna, radius, metacarpals, and phalanges).
    • Short bones: Cube-like, with similar dimensions in length, width, and thickness (e.g., carpals and tarsals).
    • Flat bones: Thin and curved (e.g., sternum, ribs, scapulae, and cranial bones).
    • Irregular bones: Complex shape (e.g., vertebrae and facial bones).
    • Sesamoid bones: Small, round bones embedded within tendons (e.g., patella).

    Compact vs. Spongy Bone

    • Compact bone: Dense, tightly packed tissue with a continuous extracellular matrix. Found in the diaphysis. 
    • Spongy bone: Irregular, thin bony plates with projections; highly developed to resist compressive forces, reducing bone weight. Found in the epiphysis.

    Bone Matrix

    • Osseous tissue (bone tissue) is connective tissue that supports the cells, called osteocytes, providing both structure and flexibility.
    • The matrix is composed of collagen fibers (1/3) and calcium and phosphate salts (2/3).
    • Collagen provides flexibility and framework for bone formation.
    • Calcium and phosphate salts provide hardness and strength to bone.

    Bone Cells

    • Osteogenic cells: Stem cells that differentiate into osteoblasts as needed.
    • Osteoblasts: Build bone matrix by secreting the collagen matrix.
    • Osteocytes: Mature bone cells that maintain bone tissue.
    • Osteoclasts: Resorb old bone tissue.

    Paget's Disease

    • A disorder of bone remodeling process.
    • Patients usually over 40 years old.
    • Overactive osteoclasts cause bones to be prone to fractures.
    • Symptoms include bone deformities, pain, and frequent fractures.

    Bone Fractures

    • Open Fractures: The fractured bone breaks through the skin.
    • Closed Fractures: The fractured bone is misaligned but remains within the skin.
    • Reduction: Manipulating the bone back to its correct alignment.
    • Open Reduction: Surgical procedure to reduce the bone.
    • Closed Reduction: Non-surgical procedure to reduce the bone.

    Fracture Repair

    • Direct bone healing involves direct bone-to-bone contact.
    • Indirect bone healing involves the formation of cartilaginous patches between the broken bones before regeneration begins.

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    Bone Structure and Function PDF

    Description

    Test your knowledge on bone structure and functions, including the roles of bones in protection, support, and blood cell production. This quiz covers key aspects of bone marrow and the anatomy of long bones. Perfect for biology students eager to learn more about the skeletal system.

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