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