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If thyroid tumor secreted an excessive amount of calcitonin, we would expect
an elevated level of osteoblast activity.
Osteoblasts deposit more bone matrix in response to all of the following factors except
A farmers finger is pulled completely off his hand by a piece of farm machinery. This is
In the development of the skeleton, what typically occurs around the ages of 18-21?
The epiphyseal plates close.
Hypocalcaemia can result from any of the following expect
excessive secretion of parathyroid hormone.
One thing calcitrol does that parathyroid hormone does not is
stimulate the small intestine to absorb more phosphate.
Bones that serve as levers and are moved by skeletal muscle to produce movement are termed
The cavity in the diaphysis of long bones is called the ____ cavity and commonly contains ____ marrow.
The periosteum is a connective tissue sheath which lines the ____of bones and fuses with bones by way of ___ fibers.
Outer space, perforating
Not all compact bone is organized around a central canal with concentric lamellae. Lamellae found in the inner and outer boundaries of dense bone run parallel to the bone surface. These lamellae are called ____
As bone grows in the child only two areas of cartilage are left at each epiphysis. These two areas are
articular cartilage and epiphyseal plate.
At the epiphyseal plate, the zone of calcification
minerals are deposited between lacunae, chondrocytes die and a calcified matrix is left.
In the zone of bone deposition, ____ cells rapidly invade the calcified matrix and lay done bone. Then___ cells erode the spongy bone to form the marrow cavity.
If the pH of blood drops below 7.35, your body is said to be in a state of acidosis. To counteract this acidosis, you would expect your kidneys to excrete more hydrogen ions, your breathing rate to increase to blow off more carbon dioxide, and your bone to
increase the activity of osteoclasts.
An individual has the following symptoms: increased excitability of the nervous system and increased muscle spasms particularly in the hands and feet. This individual most likely is suffering from
Osteoclasts are stimulated, calcium is reabsorbed by the kidneys, calcitriol is formed and osteoblasts are inhibited from forming collagen. The best explanation for these activities is
low blood calcium and increased production of PTH.
The use of anabolic steroids by adolescent boys will
decrease the growth of bone by prematurely closing the epiphyseal plate.
A loss of bone mass, especially spongy bone, is usually a result of lack of exercise or deficiency of estrogen after menopause. This disorder is called
Nodding your head "yes" represents movement of which type of joint.
A second class lever/Saddle Joint
A small rounded process is called a ___ while a massive process is called a(n)___.
The suture that separates the parietal bone from the occipital bone is the____ suture, while the suture between the parietal and temporal bone is the___ suture.
The large irregular opening just medial to the syloid process of the temporal bone is the
external acoustic meatus.
This bone, which resembles the blade of a plow, forms the inferior part of the nasal septum and is called the
The region of the vertebral column, which has the most number of fused or unfused vertebrae, is the
This vertebra has the following characteristics:body,vertebral foramen, spinous process,transverse process,and transverse foramen. This vertebra is a
In herniated, ruptured or slipped disc the area of fibrocartilage called the ___cracks and the ___ oozes out and may put painful pressure on the spinal cord or spinal nerve.
annulus fibrosus,nucleus pulposus.
The head of most ribs articulates with the body of the thoracic vertebra at the
superior and inferior costal facets.
Ribs 8 through 10 attach to costal cartilage of rib 7. RIbs 8 through 10 are called____.
The capitulum of the humerus articulates with the__while the trochlea of the humerus articulates with the ___.
The tibia is one of the major weight bearing bones of the leg and articulates inferiorly with this weight-bearing bone called the___.
The humerus is held in the glenoid cavity more securely by the ___ than any other structure.
To raise your hand and place it on the shoulder of the person standing in front of you involves ____of the shoulder.
To be sitting on a sofa and raise your arm to rest it on the back of the sofa involves___at the shoulder joint.
If you stand on tiptoes to reach something on a high shelf, you are performing ___at the ankle joint.
Suppose you cup your hands to hold some water. This action would most likely involve
adduction of the fingers.
A certain lever has a fulcrum at one end, a tendon exerting an effort of 5 cm distal to the fulcrum and acts againt a resistance of 6 cm distal to the effort. What is the mechanical advantage?
Which of the following is true of joints that are first-class levers.
Their mechanical advantage may be greater or less than 1.0
A structurally classified joint which has no synovial cavity and is held together by ligaments is termed
The functional and structural classifications that best describe the tibiofibular joint are
amphiarthroses, fibrous joint
The suture between the temporal bone and parietal bone and between the temporal bone and sphenoid bone is called____.
The joint between the ribs and costal cartilage is ____ joint which is specifically called a _____.
Synovial fluid is rich in ___ and ____ which gives it a viscous slippery texture similar to egg white before it is heated into white gel.
Which one of the following joints does not fit with the others?
proximal radioulnar joint between head of the radius and radial notch of the ulna.
Which one of the following is the weakest joint?
Ball and socket(head of humerus, glenoid fossa of scapula)
The movement in which one end of an appendage remains relatively stationary while the other end makes a circular motion is
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