Human Anatomy: Bone Structure and Function

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Questions and Answers

Which type of bone is exemplified by the vertebrae and facial bones?

  • Short Bones
  • Flat Bones
  • Long Bones
  • Irregular Bones (correct)

What is the primary function of hyaline cartilage in the context of bones?

  • It covers the joint surfaces to allow smooth movement. (correct)
  • It produces red blood cells within the bone.
  • It provides structural support to the bone.
  • It helps anchor muscles and ligaments to the bone.

Which part of the bone is primarily composed of spongy bone?

  • Periosteum
  • Cortex
  • Epiphyses (correct)
  • Diaphysis

What is contained within the periosteum?

<p>Blood vessels and connective tissue (A)</p> Signup and view all the answers

What type of tissue are tendons and ligaments made of?

<p>Dense connective tissue (A)</p> Signup and view all the answers

What is the process called where tissues are replaced by bone during embryonic development?

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

Which part of the embryonic skeleton forms primarily from fibrous connective tissue?

<p>Cranial and facial bones (C)</p> Signup and view all the answers

What remains between the skull bones at birth, indicating incomplete ossification?

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

Where does ossification begin in the form of bone development?

<p>In the centers of the bones (B)</p> Signup and view all the answers

What type of bone marrow is primarily found in the cavity of long bones?

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

Which nutrient is essential for the formation of collagen in the bone matrix?

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

What is the primary role of parathyroid hormone in bone metabolism?

<p>Increases blood calcium levels (B)</p> Signup and view all the answers

Which hormone is responsible for decreasing the reabsorption of calcium from bones?

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

What is the consequence of estrogen or testosterone on long bone growth?

<p>Causes long bones to stop growing (A)</p> Signup and view all the answers

Which nutrient is crucial for the absorption of calcium and phosphorus in the small intestine?

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

What is the primary function of red bone marrow in the skeletal system?

<p>Production of blood cells (D)</p> Signup and view all the answers

Which type of bone tissue is characterized by cylindrical arrangements of osteocytes?

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

How does the skeletal system help in maintaining homeostasis?

<p>Through the storage of excess calcium (D)</p> Signup and view all the answers

Which bones are specifically mentioned as protecting internal organs?

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

What distinguishes spongy bone from compact bone?

<p>Arrangement of osteocytes (B)</p> Signup and view all the answers

What role does calcium play in bone structure?

<p>It is crucial for blood clotting and bone strength (B)</p> Signup and view all the answers

Which of the following is NOT a function of the skeletal system?

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

What is the composition of the bone matrix?

<p>Calcium carbonate and calcium phosphate (C)</p> Signup and view all the answers

What is the main purpose of fontanels in an infant's skull?

<p>To allow for compression during childbirth. (B)</p> Signup and view all the answers

Which type of tissue initially comprises the bones of the trunk and extremities in an embryo?

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

Where does the primary center of ossification develop in long bones?

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

What occurs at the epiphyseal discs in long bones after birth?

<p>Growth in length stops when cartilage is replaced by bone. (C)</p> Signup and view all the answers

Which cells are responsible for forming the marrow canal in long bones?

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

Flashcards

Bone tissue

A type of connective tissue that makes up the skeleton, providing support, protection, and a framework for movement.

Compact bone

The hard, dense outer layer of bone, composed of haversian systems.

Spongy bone

The inner, more porous layer of bone, containing red bone marrow.

Osteocytes

Mature bone cells responsible for maintaining the bone matrix.

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Bone matrix

The non-living, mineralized substance that makes up the majority of bone tissue.

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Hemopoiesis

The process of blood cell production, occurring primarily in the red bone marrow.

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Red bone marrow

A specialized tissue found in the spongy bone, responsible for producing blood cells.

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Calcium

The mineral that is essential for bone structure and other bodily functions.

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What are long bones?

Long bones are longer than they are wide, with a shaft and two ends. They are responsible for support, movement, and red blood cell production.

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What covers bone surfaces in joints?

Hyaline cartilage is a smooth, flexible tissue that covers the ends of bones at joints. It reduces friction and allows for smooth movement.

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What is the membrane covering a bone called?

The periosteum is a tough membrane that covers the outer surface of bones (except the joint surfaces). It helps with bone growth, repair, and attachment of tendons and ligaments.

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What connects muscles to bones?

Tendons are strong cords of fibrous connective tissue that connect muscle to bone. They transmit force from muscles to bones for movement.

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What connects bone to bone?

Ligaments are bands of fibrous connective tissue that connect bone to bone. They provide stability and support to joints.

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Ossification

The process of bone formation, where other tissues are replaced by bone.

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Fontanels

The areas in an infant's skull where fibrous connective tissue remains between the bones.

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Osteoblasts

Cells responsible for creating the bone matrix.

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Intramembranous ossification

The initial stage of bone development in the embryo, where bones form from fibrous connective tissue.

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Endochondral ossification

The initial stage of bone development in the embryo, where bones form from cartilage.

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Growth Hormone

Increases protein synthesis and energy production from all food types.

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Insulin

Increases protein synthesis and energy production from all food types.

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Calcitonin

Decreases the reabsorption of calcium from bones.

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Parathyroid Hormone

Increases protein synthesis and the rate of mitosis of chondrocytes in cartilage; Increases the reabsorption of calcium by the small intestine and kidneys.

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Estrogen or Testosterone

Causes long bones to stop growing.

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Fontanels: What are they?

Soft spots on a baby's skull that allow the skull to compress during birth, allowing for easier passage through the birth canal.

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Diaphysis: What is it?

The central shaft of a long bone, made of compact bone.

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Epiphyses: What are they?

The ends of long bones, made of spongy bone.

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Epiphyseal Plates: What are they?

Cartilage plates located at the ends of long bones, responsible for bone growth in length.

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Ossification: What is it?

The process by which cartilage is gradually replaced by bone throughout childhood and adolescence.

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