Chapter 5/6/7 Human A/P PQ

Bob was completely bald on the top of his head by the time he was 35 years of age. Bob noticed he produced abundant sweat on his head when he exercised. He also noticed that his scalp was no longer oily. Which of the following changes account for the observations?(1) He has fewer functional hair follicles now.(2) He has fewer functional sebaceous glands now.(3) He has fewer merocrine sweat glands now.(4) He has fewer apocrine sweat glands now.

1,2

Bone remodeling may occur

All: as bones grow/adjust to stress/fractures heal/ constantly during life

The processes of intramembranous and endochondral ossification are similar in several respects. Which of the following statements applies to both intramembranous and endochondral ossification?

Both processes form woven bone

Osteoclast activity decreases when ___ levels are elevated

Calcitonin

WHat is the site of longitudinal growth in long bones

Epiphyseal plate

Which of the following statements about bone remodeling and repair is correct?

Exposure of a bone to increased mechanical stress can lead to bone remodeling

Andrew is in a car accident and fractures his maxilla. To which group of bones does this belong?

Face

Which of the following is associated with osteoclast reabsorption of bone?

Hydrogen ions form an acid environment in bone matrix

A coroner determines the cause of death to be strangulation because this delicate bone is fractured. Which bone is this?

Hyoid

A young bone (10) exhibited the following symptoms: advanced development of secondary sexual characteristics and rapid growth. Which of the following likely caused his condition?

Hypersecretion of testosterone

Which of following bones forms part of the lateral wall of the nasal cavity?

Inferior nasal conchae

Which of the following is found inferior to the maxilla and has a posterior articulation with the temporal?

Mandible

Which of the following facial bones is correctly matched with its function?

Maxilla- possesses sockets for teeth

A person who gets hit on the back of the head might suffer injury to which of these bones?

Occipital

Which of the following is correctly matched?

Osteoclast-responsible for reabsorption

Which of the following statements regarding PTH (parathyroid hormone) is true?

PTH causes increased reabsorption of Ca2+ in the kidneys

Vitamin C is essential for normal collagen synthesis. If a child suffered from a vitamin C deficiency, which of the layer of skin would be most affected?

Reticular layer of dermis

Which of the following bones is part of the axial skeleton?

Rib

Which of the following events of endochondral ossification occurs last?

Secondary ossification centers appear in epiphyses

A 12 year old girl has not yet experienced a bone growth spurt. Which particular chemicals must her body produce before this can occur?

Sex hormones

Which of the following bones is paired?

Temporal

Which of the following statements concerning the epidermis is true>

The epidermis is nourished by blood vessels located in the dermis

Which of the following statements concerning the subcutaneous layer is false

The subcutaneous layer is composed of dense connective tissue with collagen and elastin fibers

Which of the following statements concerning the vertebrae is true?

Thoracic vertebrae have long, thin spinous processes.

Which of the following statements concerning vitamin D is false

Vitamin D causes kidney to excrete calcium

Which of the following bones form the nasal septum?

Vomer and ethmoid

Which of the following statements regarding calcium homeostasis is true?

When blood calcium levels are too low, osteoclast activity increases

Getting a kiss on the cheek means the --- bone is involved.

Zygomatic

Body odor results from secretions from the... sweat glands

apocrine

The first cervical vertebrae is the ---.

atlas

A victim of an automobile accident goes into shock, which results in decreased blood flow, the skin will

become pale

The thumb and big toe are similar in that

both have two rather than three phalanges

Osteoblasts involved in bone growth in length come primarily from

connective tissue surrounding blood vessels of the endosteum

The stratum basale

contains cells that undergo mitosis to form new epidermal cells

Cartilage

contains chondrocytes located in lacunae

Spongy bone tissue

contains interconnecting plates called trabeculae

Stretch marks develop of the abdomen of pregnant women because of the stretching and rupture of the...

dermis

A patient in a skiing accident is told that the lateral side of the ankle joint has been crushed. The bone that has been injured is the -----.

fibula

Which of the following anatomical features of bones is correctly matched with its function?

foramen- a hole for a blood vessel

The proper sequence of events in bone repair is

hematoma formation, callus formation, callus ossification, remodeling of bone

The compression (weight-bearing) strength of bone matrix is due to the presence of ----.

hydroxyapatite crystals

Parallel curving ridges of dermis that shape the overlying epidermis into friction ridges

improve the grip of the hands

The site where spinal nerves exit the vertebral column is the ----.

intervertebral foramen

Thick skin

is found in areas subject to pressure or friction, such as the palms.

Which statement is true about the dermis?

it is responsible for most of the skin's structural strength

Delicate unpigemented hairs that cover the fetus in early development is called

lanugo

The medullary cavity is

lined with endosteum

In appositional growth of cartilage

new chondrocytes and new matrix are added on the outside of the tissue

The sequence of events that produces growth at the epiphyseal plate is

proliferation, hypertrophy, calcification, cell death, ossification, and remodeling

Important functions of the skeletal system include

protection of the brain and soft organs

The anterior boundary of the rib cage is/are the ...

sternum

The layer of epidermis that undergoes mitosis and forms new epidermal cells is the ---.

stratum basale

Which layer of the epidermis is found in only a few areas of the body

stratum lucidum

A person who has cerebrospinal fluid draining from the ear probably has a fracture of the --- bone.

temporal

The longitudinal growth of long bones ceases when

the epiphyseal plate is completely replaced with bone tissue

The ribs articulate with the --- vertebrae.

thoracic

Those ribs that attach directly to the sternum are referred to as --- ribs.

true

Normal bone growth requires adequate amounts of certain substance from the diet. Which of the following list three of the dietary needs for normal bone growth?

calcium, phosphate, and vitamin D

A passageway connecting neighboring osteocytes in an osteon is a

canaliculus