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Week 5 Chapters 11, 12, & 13

Why is cartilage slow to heal? because it is semi-solid and flexible and because it does not have a blood supply
Why are osteocytes spread out in bone tissue? Formation of osteoid spreads out the osteoblasts that formed the ossification centers.
Which of the following bones is (are) formed by intramembranous ossification? the flat bones of the cranium
Bones grow in length due to activity in the ________. epiphyseal plate
Bones grow in diameter due to bone formation ________ In the endosteum or periosteum
Which of the following represents the correct sequence of zones in the epiphyseal plate? calcification, maturation, proliferation, reserved
In endochondral ossification, what happens to the chondrocytes? They die in the calcified matrix that surrounds them and form the medullary cavity.
Select the answer that best describes the axial skeletal structure. Supports and protects organs, Provides framework for muscles that adjust positions of neck , head, and trunk ; Provides framework for muscles that perform respiratory movements , and Provides framework for muscles that anchor and stabilize the append
Adipocytes, found in the yellow bone marrow, stores and releases ____________________________ for energy. fat and triglycerides
Which function of the skeletal system would be especially important if you were in a car accident? protection of internal organs
Without red bone marrow, bones would not be able to ________. male blood cells
Which of the following provide flexibility and smooth surfaces for movement? Cartilages
The fontenelles of an infant's skull consists of fibrous membrane
Which statement below is correct regarding fontanelles? The anterior and posterior fontanelles allow for overlaping of skull bones to decrease the diamiter of the fetal head at birth, Allows for brain growth, The anterior fontanelle closes at about 2 years of age, and The fontanelles are fibrous membra
Hematopoietic stem cells that are found in red bone marrow can develop into a variety of different blood cells, including red blood cells, white blood cells, and platelets. true
A person with a fractured patella would expect discomfort in the: knee
The ulna articulates proximally with the: humerus.
Which of the following is not one of the primary functions performed by bones? Hormonal production
The humerus articulates proximally with the clavicle. false
Because of how the clavicle articulates with the scapula, all shoulder movements involve the sternoclavicular joint. true
Calcification of the organic bone matrix occurs when complex calcium salts are deposited in the matrix.
In bone growth, the medullary cavity is enlarged because of the activity of: osteoclasts
An open fracture is also known as a compound fracture. true
Which of the following may cause skeletal variations? Inadequate supply of calcium and vitamin D, Mechanical stress , and age
The cells responsible for active erosion of bone minerals are called: osteoclasts.
Appositional growth of cartilage occurs when chondrocytes begin to divide and secrete additional matrix.
The humerus articulates proximally with the scapula.
Which of the following is not dependent on the proper amount of calcium ions in the blood? Blood clotting , Transmission of nerve impulses, and Contraction of cardiac muscle
Small cells that synthesize and secrete a specialized organic matrix are osteoblasts.
During childbirth, a baby passes through an imaginary plane called the: pelvic outlet.
Which of the following is not a characteristic of the epiphyses? Cylindrical in shape
When the knee is flexed, the patella can be easily distinguished. false
An age-related skeletal disease that is characterized by loss of bone mineral density and increased bone fragility is osteoporosis.
Before childbirth, the symphysis pubis softens. true
The following are functions of bone except for support, protection, mineral storage, and hematopoiesis.
Young children’s bones have a greater risk of fracturing because of incompletely ossified bone. false
The cell organelles that synthesize organic matrix substances in bone formation are: endoplasmic reticulum and Golgi apparatus.
As the activity of osteoblasts increases, the: amount of calcium in bone increases and level of calcium in the blood decreases.
Normally, bone loss will begin to exceed bone gain between the ages of _____ years. 35 and 40
One similarity between the structures of the foot and hand is the equivalent degrees of movement of both the thumb and the big toe. false
Hematopoiesis is carried out in the: red bone marrow.
Bones grow in diameter by the combined action of which two of the three bone cell types? osteoblasts and osteoclasts
Blood calcium levels involve secretion of which two hormones? parathyroid and calcitonin
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? fontanels
In intramembranous ossification, the process of appositional growth refers to the: addition of an outside layer of osseous tissue on flat bones.
Created by: ashleysummers
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