Ch. 7 Skeletal System (online)
The shaft of a long bone is composed of this type of bone:
compact bone
During osteogenesis, where does the primary ossification center form?
diaphysis
The medullary cavity of a long bone is lined with
endosteum
Yellow bone marrow contains a large percentage of:
fat
Which of the following causes growth in long bones and skeletal muscles?
growth hormone (GH)
A young boy fractured his femur in the region of the epiphyseal plate. Which of the following might occur?
impaired lengthwise growth in the femur
Concentric circles of narrow sheets of calcified matrix are referred to as
lamellae
Regulatory functions of the skeletal system include
maintaining the normal concentrations of calcium and phosphate ions in body fluids
___ is the process of bone formation which is governed by bone-forming cells called ___.
ossification; osteoblasts
When blood calcium levels fall too low, PTH is triggered to activate these cells, ___, to destroy bone.
osteoclasts
In a living bone, what is contained in a lacuna?
osteocyte
Compact bone is formed from cylinder-shaped structures known as:
osteons
Two hormones that work together to elevate calcium levels in the body are ________ and ________.
parathyroid hormone; calcitriol
The connective tissue covering the outer surface of a bone is (the)
periosteum
Which of the following occurs in intramembranous ossification?
Fibrous connective tissue is converted to bone tissue, which first resembles spongy bone.
Bone growth occuring after epiphyseal plates close is called:
appositional growth
An adult only has cartilage in the:
articular cartilage
Osteogenesis is the process of:
bone formation
What hormone lowers blood calcium levels by depositing the excess calcium to bones?
calcitonin