Which of the following is not a component of the skeletal system?
Tendons
A(n) ____ would not involve damage to the structures that comprise the skeletal system
Ruptured calcaneal (Achilles) tendon
The bones of the skeleton provide structure to the body and serve as a ____ to hold up the body and maintain proper positioning of some organs
Support
The skull, pelvis, ribs, vertebral column, and sternum provide ____ to many delicate organs of the body by encasing them in hardened, shell-like or caged structures
Protection
The ____ of the entire skeleton or skeletal elements utilizes the anchoring of muscles to attachment sites on the bones, which then serve as levers
Movement
Minerals can be stored in the skeleton, which acts as a reservoir, storing or releasing minerals as needed to maintain ____ throughout the body
Electrolyte balance
The storage or release of buffering compounds works to aid the body in ____ balance
Acid-Base
Contained within the spongy sections of bones, red bone marrow is responsible for ___
Blood formation
Which of the following would directly affect osseous tissue?
A vitamin-C deficiency
What is the calcium-phosphate salt deposited within bone called?
Hydroxyapatite
What is the function of red bone marrow?
Blood cell production
Within compact bone, a central canal is found at the center of which structure?
An osteon
____ is/are found in compact bone but not spongy bone
Central canals
In an adult, which of the following is a bone that does not contain red bone marrow?
Radius
In an adult, a compound fracture of the ____ could lead to a "fat" embolism entering the blood stream
Tibia
The bones of the skull form by which type of ossification?
Intramembranous
Where does bone formation occur during the endochondral ossification?
Hyaline cartilage model
Elongation of bones is accomplished via ___ growth
Interstitial
Growth in the epiphyseal plate adds to the ___ of a bone until the plate is depleted in early adulthood
Length
The ____ is a layer of hyaline cartilage with a metaphysis on each side
Epiphyseal plate
When the cartilage is depleted, the epiphyseal plates ___, and the bone can not grow longer
Close
The internal mark in the bone left behind by the closed epiphyseal plate is called the ____
Epiphyseal line
Mineralization is a process that extracts ____ and ____ from the blood plasma and deposits it into bone
Calcium; Phosphate
To help regulate body calcium levels, bone has two reserves. The disadvantage of the stable reserve is that it ____
Cannot easily be exchanged or released into the tissue fluid
Each of the following complications listed below is a result of homeostatic calcium imbalance. Which would not be life threatening?
A deficit of appositional bone grwoth
Which hormone inhibits osteoclasts and stimulates osteoblasts to lower blood calcium levels?
Calcitonin
The most active form of ___ is called calcitriol
Vitamin D
Osteoblast activity in children is stimulated by the hormone ____
Calcitonin
When blood calcium levels drop, glands embedded in the posterior thyroid secrete ____ hormone, which stimulates osteoclastic activity
Parathyroid
The hormone ____ influences both resorption and deposition of bone.
Calcitrol
Vitamin D stimulates absorption of dietary calcium from the ____ system
Digestive
When When levels of blood calcium increase in children, calcitonin is released from the ___ of the thyroid gland
C cells
This circulating calcitonin inhibits ___ and stimulates ____ within minutes
Osteoclasts; Ostepblasts
The effect on osteoclasts causes a decrease in bone resorption and a concurrent ____ in bone deposition due to the activity of osteoblasts
Increase
The decline in bone breakdown and increased mineralization causes blood calcium to ___ back to normal levels
Decrease
When levels of blood calcium ____, parathyroid hormone is released from the parathyroid glands located on the posterior thyroid
Decrease
Parathyroid hormone causes an increase in the number of ____ and greater rates of bone resorption
Osteoclasts
In the kidney, parathyroid hormone will decrease the amount of calcium excreted by increasing ___ from kidney tubules
Reabsorption
Parathyroid hormone increases the renal conversion of ____ , which secondarily works to increase calcium levels in the blood
Calcidiol to calcitriol
Inhibition of ___ by parathyroid hormone occurs as a result of a decreased production of organic matrix
Osteoblasts
As a result of direct actions on the target cells of the bone and kidneys along with an indirect action on the small intestine (calcitriol), parathyroid hormone works to ____ blood calcium levels.
Increase
Which of the following best describes osteomalacia?
The softening of the bones in adults due to calcium depletion
Osteogenesis imperfecta is due to the deficiency of ____ in the matrix, which makes the bones extremely brittle
Collagen
Greenstick fractures most commonly occur in children because ____
Their bones contain a higher proportion of collagen
A ____ fracture is one in which the bone is broken into three or mor pieces
Comminuted
During fracture healing, cartilage is deposited in granulation tissue to form which of the following?
A soft callus
Any break in a bone is called a ____ , and repair is done in stages by the body
Fracture
A ____ will form and will turn into granulation tissue at the site of injury
Hematoma
Depositions of collagen and fibrocartilage will then turn the tissue into a soft ___
Callus
____ deposit a temporary bony collar around the fracture ossification occurs
Osteoblasts
The process finishes with bone ____ converting spongy to compact bone
Remodeling
Which type of bone growth occurs within cartilage and results in bone elongation?
Interstitial
Bones in the legs, arms, spine and pelvis grow?
At different rates
Which of the following is not considered a weight bearing activity?
Swimming
Trusses and arches, which help form an internal scaffolding network, are found in ___
Trabecular bone
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 mineral is most important throughout life to assist in maintaining strong bones?
Calcium
Which structure is highlighted?
Microscopic canals between the lacunae of ossified bone
Canaliculi
Which structure is highlighted?
A microscopic, longitudinal channel located at the center of each osteon in compact
Central canal
Which structure is highlighted?
The functional, cylindrical unit of mature compact bone
Osteon