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Skeletal System Quiz

Anatomy: Introduction to the Skeletal System

QuestionAnswer
Which of the following is not an active tissue found in the bone? a. Cartilage b. Cuboidal Epithelim c. blood d. nervous tissue b. Cuboidal Epithelium
What is the shaft of a long bone called? Diaphysis
A bone that consists mainly of tightly packed tissue is called.. Compact bone
What are trabeculae? thin, bony plates where cells lie to get nutrients from substances diffusing into the canaliculi
What is a long bone? Bone that has long, longitudinal axes & expanded ends (ex. forearm & thigh bones)
What is a short bone? Bone that is cubelike, with equal lengths & widths (ex. wrists & ankles)
What is a flat bone? Bone with platelike structures and broad surfaces (ex. ribs, scapula, skull)
What is an irregular bone? Bone that is a variety of shapes and connected to other bones (ex. vertebrae & facial bones)
What is the classification on bone called that is not common in the body? (Hint: the patella falls under this category.) Sesamoid
The bone of the cartilage between the primary and secondary ossification centers in long bones and is important for bone lengthening is called what? Articular cartilage
What happens once bone formation is complete? Osteoblasts & osteoclasts continuously remodel the bones
Cells that form new bones are called.. Osteoblasts
Cells that remodel bones are called.. Osteoclasts
What are the functions of bones? Support & protection, body movement, blood cell formation, storage of inorganic salts
What is hematopoiesis? the process of blood cell formation
Where does hematopoiesis occur in the body? In children, it occurs in the red bone marrow. In adults, in occurs in the pelvis, cranium, vertebrae, and sternum.
What is the function of yellow bone marrow? It stores fat and replaces red marrow in adults
What is the function of red bone marrow? It produces blood cells in the medullary cavity of bones in children.
What is an endosteum? a thin layer of cells that lines the medullary cavity
What is a periosteum? a tough, vascular covering of fibrous tissue that encloses the bone
What are canaliculi? a cellular process in which osteocytes communicate with nearby cells
How does ossification work in the infant skeleton? begins as fragile membranes and cartilage but after 3 months of birth, that solidifies into bone
What is another name for spongy bone? cancellous bone
What is spongy bone? consists of branching bony plates and irregular connecting spaces
What are haversian systems? osteocytes and layers of extracellular matrix clustered around a central canal in compact bone
What are Volkmann canals? They contain larger blood vessels & nerves by which the smaller blood vessels & nerve fibers in central canals communicate with the surface of the bone & medullary cavity
What are the 5 major types of a long bone? Epiphysis, diaphysis, medullary cavity, periosteum, endosteum
Describe the microscopic structure of compact bones. Osteocytes & layers of matrix are clustered around a central canal forming a cylinder shape unit called an osteon
How does an endochondral bone develop? develops in the fetus from masses of hyaline cartilage shaped like bony structures
How do osteoblasts & osteoclasts remodel bone? Osteoblasts become active within the layers of connective tissues & deposits bony matrix around itself. Osteoclasts break down the calcified extracellular matrix & secrete an acid that dissolves the inorganic component of the matrix
What substances are normally stored in bone tissue? calcium phosphate, magnesium, sodium, potassium, blood, fats
Created by: lezaq