Quiz 7

Which cell is stimulated by the hormones calcitriol and PTH?

E

What is the correct sequence of events in the healing of a bone fracture?

Hematoma formation → soft callus formation → hard callus formation → bone remodeling

Calcitonin

Hormone represented by B

Mature bones are remodeled throughout life via a process known as __________.

appositional growth

What is the blood clot at A called?

hematoma

Bone deposition cell

B

In which stage of ossification does the primary marrow cavity appear?

B

Where would the red bone marrow be found in this adult femur?

B

In which stage of ossification is an epiphyseal plate present?

D

Appositional bone growth is a process that _____.

Forms new bone on the surface of older bone

What type of growth occurs at E?

Interstitial

Arteriosclerosis is one example of ectopic ossification, which means ____.

abnormal calcification of a tissue

Bone elongation is a result of

cartilage growth

The thin layer of slightly denser spongy bone that separates an adults epiphysis from the diaphysis is called the ______.

epiphyseal line

Osteoporosis is more common in elderly females because of the lack of

estrogen

What tissue does stage A primarily consist of?

hyaline cartilage

Which of the following is an inorganic component of the bone matrix? proteoglycans glycoproteins collagen hydroxyapatite glycosaminoglycans

hydroxyapatite

Wolff's law of bone explains the effect of _____.

mechanical stress on bone remodeling

New bone is deposited by cells known as

osteoblasts

A decline in bone density can lead to _____.

osteoporosis

Blood Ca2+ deficiency stimulates __________ secretion, which leads to _____________.

parathyroid hormone, increased osteoclast activity

The result of blood calcium and phosphate levels being too low for normal deposition is a softness of the bones called _______ in children and ______ in adults.

rickets, osteomalacia

Patches of fibrocartilage formed in the healing of a fracture are called ________, whereas the bony collar formed around the fracture is called _________.

soft callus, hard callus

Which of the following is not a function of the skeleton? storage of calcium & phosphate ions storage of red blood cells providing support for most muscles protecting the brain protecting the spinal cord

storage of red blood cells

Red bone marrow does not contain

yellow bone marrow