Normal Size Small Size show me how
Physiology Week 5
Week 5 Quiz
|The cell organelles that synthesize organic matrix substances in bone formation are:
|The cell organelles that synthesize organic matrix substances in bone formation are the endoplasmic reticulum and ribosomes. The osteon, or haversian, system delivers nutrients to and removes waste products from bone cells.
|In the epiphyseal plate, the zone of hypertrophy is in the _____ layer
|Is the third layer. The next set of cell layers, called the zone of hypertrophy, is com-posed of older, enlarged cells that are undergoing degenerative changes associated with calcium deposition (Patton, 032018)
|Small cells that synthesize and secrete a specialized organic matrix are
|Osteoblasts. Osteoblasts are small cells that synthesize and secrete an organic matrix called osteoid. (Patton, 032018)
|When the knee is flexed, the patella can be easily distinguished
|False. The patella (kneecap) is the largest sesamoid bone—one of the few that consistently appear in the human skeleton. (Patton, 032018)
|Which of the following is not a characteristic of the diaphysis?
|Provides a bulbous shape for attachment of muscle. Its hollow, cylindrical shape and the thick compact bone that composes it adapt the diaphysis well to its function of providing strong support without adding cumbersome weight. (Patton, 032018)
|Which of the following is not a characteristic of the epiphyses?
|Cylindrical in shape.
|The cells responsible for active erosion of bone minerals are called:
|Osteoclasts. Osteoclasts are giant multinucleate cells that are responsible for the active erosion of bone minerals. They are formed by the fusion of several precursor cells and contain large numbers of mitochondria and lysosomes (Patton, 032018).
|The humerus articulates proximally with the clavicle
|False. The humerus articulates proximally with the scapula
|An open fracture is also known as a compound fracture
|Which structures are unique to the fetal skull and provide additional space for molding the head shape as the baby passes through the birth canal?
|After the age of 50, the density of bone
|Decreases slowly because of a shift in the remodeling activity.
|The following are functions of bone except for
|Support, protection, mineral storage, hematopoiesis
|Before childbirth, the symphysis pubis softens
|In intramembranous ossification, the process of appositional growth refers to the:
|Addition of an outside layer of osseous tissue on flat bones
|Appositional growth of cartilage occurs when chondrocytes begin to divide and secrete
|Until bone growth in length is complete, a layer of the cartilage, known as the _____, remains between the epiphysis and diaphysis
|Bones grow in diameter by the combined action of which two of the three bone cell types?
|Osteoblasts and osteoclasts
|A condition that is caused by an abnormally increased roundness in the thoracic curvature is
|The ulna articulates proximally with the:
|During childbirth, a baby passes through an imaginary plane called the
|Bones act as a reservoir for which of the following minerals?
|Young children’s bones have a greater risk of fracturing because of incompletely ossified bone.
|Hematopoiesis is carried out in the:
|Red bone marrow
|Which of the following is not one of the primary functions performed by bones?
|Normally, bone loss will begin to exceed bone gain between the ages of _____ years
|35 and 40 years
|Which of the following may cause skeletal variations?
|Inadequate supply of calcium and vitamin D, mechanical stresses, age
|Because of how the clavicle articulates with the scapula, all shoulder movements involve the sternoclavicular joint
|Blood calcium levels involve secretion of which two hormones?
|Parathyroid and calcitonin
|A person with a fractured patella would expect discomfort in the: