True/false
F
Red marrow is found only in long bones.
F
The epiphyses consist mostly of compact bone, usually with yellow marrow in the center.
F
The hardness of bone is related to its two major mineral components, calcium and iron.
T
The homeostasis of blood calcium is maintained by its moving into and out of bone tissue.
T
The occurrence of osteoporosis seems to be related to age, gender, race, and sex hormones.
T
The periosteum is a dense, white, fibrous membrane that covers bone except at joint surfaces.
T
The strength of bone is increased by the arrangement of trabeculae.
T
The tensile strength of bone is nearly equal to that of cast iron, but much lighter.
T
The type of cartilage growth most prevalent in childhood and early adolescence is interstitial or endogenous growth.
T
Throughout life, ossification and resorption continue to occur concurrently.
T
A major difference between bone tissue and cartilage is the make-up of the matrix.
T
Appositional growth of cartilage occurs when chondrocytes in the deep layer of the perichondrium begin to divide and secrete additional matrix.
F
Because of osteoclastic activity, bone fractures in children will heal much faster than fractures occurring in middle-aged individuals.
F
Bone tissue consists mostly of cells, dispersed in a limited amount of matrix.
T
Bone tissue is an osseous tissue.
F
Both cartilage and bone contain living cells and are vascular tissues.
T
Callus tissue binds the broken ends of a fractured bone.
F
During childhood and adolescence, ossification and bone resorption occur at equal rates.
F
Flat bones differ from short bones in that flat bones have an inner portion of cancellous bone covered on the outside with compact bone.
F
Haversian systems are found only in cancellous bone.
T
Haversian systems are found only in compact bone.
T
Hydroxyapatite consists of highly specialized chemical crystals of calcium and phosphate.
F
In an infant's or child's body, virtually all of the bones contain yellow marrow.
T
In young children, vitamin A deficiency can cause a decrease in the thickness of epiphyseal plates in the growing long bones.
F
Interstitial growth of cartilage most often occurs during adolescence.
T
Lack of exercise tends to weaken bones through decreased collagen formation and excessive calcium withdrawal.
T
Most bones of the body are formed from cartilage models.
F
Osteoclasts are nondividing osteoblasts that have become surrounded by matrix and lie within lacunae.
T
Osteogenesis involves the combined action of _osteoblasts and osteoclasts.
T
Osteoporosis occurs more frequently in elderly white women than in males or black women.
T
Variations in the amount of ossification and resorption of bone tissue are age dependent.
F
Walking, jogging, and other forms of exercise can weaken bones because of the pull muscles exert on bones.