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