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zoo141 Chapter 6

intramembranous ossification/abnormalities of bone growth/regulation of blood ca

QuestionAnswer
Intramembranous ossification forms dermal bones
mesenchymal cells secrete osteoid, which first forms spongy bone
remodeling converts some spongy bone into compact bone
connective tissue around the bone becomes fibrous layer of the periosteum
Abnormalities of bone growth,pituitary growth failure inadequate growth hormone → reduced epiphyseal cartilage activity → abnormally short bones
Abnormalities of bone growth, achondroplasia epiphyseal cartilages of long bones grow unusually slowly
Abnormalities of bone growth, marfan syndrome excessive cartilage formation at the epiphyseal cartilages
Abnormalities of bone growth, gigantism overproduction of growth hormone before puberty
Abnormalities of bone growth, fibrodysplasia ossificans progressiva fibrous tissues (including muscles, tendons, and ligaments) become ossified
Abnormalities of bone growth, acromegaly growth hormone levels rise abnormally after epiphyseal cartilages close
REGULATION OF BLOOD CALCIUM, decreased blood calcium parathyroid hormone (PTH) secretion →
REGULATION OF BLOOD CALCIUM increased calcitriol increased calcium reabsorption by kidneys, increased calcium absorption by intestines → increased blood calcium
REGULATION OF BLOOD CALCIUM osteoclasts stimulation → increased erosion of bone → calcium released from bone → increased blood calcium
REGULATION OF BLOOD CALCIUM increased blood calcium calcitonin secretion
REGULATION OF BLOOD CALCIUM decreased calcium reabsorption by kidneys, decreased calcium absorption by intestines → decreased blood calcium
REGULATION OF BLOOD CALCIUM osteoclasts inhibited decreased erosion of bone → calcium deposited into bone → decreased blood calcium
Created by: btuehara
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