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Histology-World!
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Histology Testbank: Bone 3a |
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Instructions: For each histology question, pick the one best answer. This histology test bank is also useful for the histology questions on the USMLE (USMLE step 1). 1. Answer: e Compact bone is also called dense bone. Compact bone has the Haversian system. Immature bone is woven bone. It is nonlamellar bone or bundle bone. Spongy bone is also referred to as cancellous bone. The mineralized tissue is seen as spicules. Marrow spaces are also present. 2. Answer: d An osteoclast is a multinucleated cell involved in the degradation of bone. It is a bone resorbing cell. An osteon is the cylindrical structure with bone. An osteon is also called a Haversian system. The mature bone cell is called an osteocyte. It sits in a space, called a lacuna. An osteoblast is an immature bone cell. The osteoblast is the bone forming cell. Osteoid is unmineralized bone matrix. 3. Answer: b The matrix of bone is mineralized. Within the matrix are collagen fibers and proteoglycans. Elastic fibers and reticular fibers are types of fibers seen in connective tissue. However, collagen fibers are the fibers found in bone. Although bone is classified as a connective tissue, it is not classified nor is it composed of dense irregular connective tissue. Dense irregular tissue is seen in the dermis. Bone is not classified nor is it composed of dense regular connective tissue. Dense regular connective tissue is seen in tendons and ligaments. 4. Answer: a Canaliculi are the little tunnels within bone. Sharpey's fibers are collagen fibers that extend into a bone at an angle. Trabeculae are the spicules seen with spongy bone. Tome's process is seen in teeth, this process is responsible for enamel production. An osteocyte rests in a space called a lacuna. 5. Answer: e The space of Disse is in the liver. The space of Disse is also called the perisinusoidal space. It is the space between the liver sinusoids and the hepatocytes. The space of Mall is also in the liver. The space of Mall is located at the portal canal and is the region between the connective tissue and the liver parenchymal cells. It is the site where lymph is formed within the liver. A vacuole is a small clear space within an individual cell. A lacuna is a small space or depression. The space that the chondrocyte rests in is a lacuna. Howship's lacuna is seen in bone. Howship's lacuna is a space seen underneath an osteoclast. 6. Answer: b The perimysium is the connective tissue sheath which surrounds muscle fascicles. The periosteum is the connective tissue covering of a bone. The perichondrium is the connective tissue which surrounds cartilage. The perineurium is the covering of nerve fascicles. The endosteum is the lining of the inner bone (the side which abuts the medullary cavity). Note from Sarah Bellham: The prefix "peri" means around, such as in the word "perimeter". The prefix "endo" means within or inner, such as in "endosteum", "endocrine", "endoscope". 7. Answer: c Hyaline cartilage forms the articular surface on bones. 8. Answer: b Red marrow contains active hematopoietic tissue. Yellow marrow is primarily fat. 9. Answer: b An osteoclast is a multinucleated cell involved in the degradation of bone. It is a bone resorbing cell. An osteon is the cylindrical structure with bone. An osteon is also called a Haversian system. The mature bone cell is called an osteocyte. It sits in a space, called a lacuna. An osteoblast is an immature bone cell. The osteoblast is the bone forming cell. Osteoid is unmineralized bone matrix. 10. Answer: a Compact bone is also called dense bone. Compact bone has the Haversian system. Immature bone is woven bone. It is nonlamellar bone or bundle bone. Spongy bone is also referred to as cancellous bone. The mineralized tissue is seen as spicules. Marrow spaces are also present. |
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