Skeletal Homework

Height begins to decrease on average after age

30.

At which of the following ages would calcium loss from bone be more than calcium deposits into bone, even when a high calcium diet is eaten?

50 years old

Which of the following is(are) an example of an intramembranous bone?

Broad, flat skull bones

Which of the following is not a function of bones?

Contraction

Bone-building cells beneath the endosteum lay down bone to form ridges around a blood vessel.

False

Once a tunnel of bone is formed around a blood vessel, the bone-building cells of the periosteum lay down bone in concentric circles that fill in the tunnel.

False

Which of the following is not a step in endochondral bone formation?

Hyaline cartilage changes to adipose tissue.

What is a function of bone that is due to its relationship with skeletal muscle?

Movement of limbs

Throughout life, bone tissue continues to change. ______ are responsible for resorbing bone matrix and ______ are responsible for replacing it.

Osteoclasts; osteoblasts

A six-month-old baby is admitted to the hospital with a broken bone. This is the third fracture in the otherwise healthy child. The parents are arrested on charges of child abuse. The defense lawyer gets the charges dropped after the results of genetic tests indicate which of the following conditions?

Osteogenesis imperfecta

Which of the following is not found associated with spongy bone?

Osteons

What is the role or function of yellow marrow in the bone tissue?

Yellow bone marrow is a site for storage of fat.

What is the definition of hematopoiesis?

The process of blood cell formation.

Which is true of sex hormones?

They stimulate ossification of the epiphyseal plates.

Which of the following bones is not part of the orbit of the skull?

Vomer

Which of the following are components of the pelvic girdle?

all of the above.

Bones in the legs, arms, spine and pelvis grow:

at different rates.

What is the most important mineral to assist in maintaining strong bone throughout life?

calcium

The secondary curves of the vertebral column are the

cervical and lumbar curvatures.

The atlas is one of the

cervical vertebrae.

What is the end of a long bone called?

epiphysis

The talus, calcaneus, navicular, cuboid, and lateral, intermediate, and cuneiform bones are all part of the

foot

Articular cartilage is

hyaline cartilage.

Curvatures of the spine produce all of the following except

increased height.

The zygomatic bone is an example of a(n)

irregular bone.

The femur

is all of the above.

The concentric rings of compact bone are called:

lamellae.

The hard palate is composed of the

maxillary and palatine bones.

Bacteria infecting the mucous membranes in the air cells of the mastoid process most likely spread from the

middle ear.

Articular cartilage of a long bone is found

on the outer surface of the epiphyses.

Bone-producing cells are called:

osteoblasts.

The combination of all of the concentric rings of bone built around blood vessels is called a(n):

osteon.

Bisphosphonates are drugs that slow the progress of

osteoporosis.

Which of the following is not considered a weight bearing activity?

swimming

In which decade of life does the removal of the bone matrix first exceed production of new bone?

third decade

The primary curves of the vertebral column are the

thoracic and sacral curvatures.

The presence of an epiphyseal plate indicates that

the bone is lengthening.

The zygomatic arch is composed of processes of

the zygomatic and temporal bones.

Trusses and arches which help form an internal scaffolding network are found in:

trabecular bone.

Ribs that join the sternum directly by costal cartilages are called

true ribs.

The number of bones in the skeletal system is

variable

What vitamin is necessary for proper absorption of calcium in the small intestines?

vitamin D