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A&P Exam 2
Terms in this set (60)
Long bones grow from the
Which of the following processes results in an increase in bone diameter?
Which of the following is NOT an effect of parathyroid hormone?
- increased calcitriol synthesis
- reduction of calcium excretion
- RISE IN BLOOD PHOSPHATE LEVELS
- increased osteoclast activity
Closure of the epiphyseal plates marks the ends of all forms of bone growth.
false - (endochondral ossification) epiphyseal fusion marks end of bone growth
Which of the following influences bone remodeling?
- vitamin D
- hormones like estrogen and testosterone
- intake of dietary calcium
Where within the epiphyseal plate are the dividing cartilage cells located?
Between the resting zone and the hypertrophic zone.
Which of the following is the most important stimulus for epiphyseal plate activity during infancy and childhood?
Calcitriol increases blood calcium levels by promoting calcium ion absorption in the small intestine.
The process of dissolving bone and returning its minerals to the bloodstream is known as
Proliferation and hypertrophy of cartilage cells in the epiphyseal plate leads to longitudinal bone growth
by pushing the epiphysis away from the diaphysis
Calcitonin is released in response to an elevated calcium ion concentration in the blood.
A fracture in the shaft of a bone would be a break in the
Ossification of the ends of long bones
is produced by secondary ossification centers
Which of the following is necessary for intramembranous ossification to take place?
Formation of primary ossification centers in the fibrous connective tissue membrane
Which of the following cell types accomplishes the breakdown or resorption of bone during remodeling?
Ossification is the process of
A radiograph of a young child's hand will most likely show open epiphyses.
The diaphysis of a long bone is primarily made up of
During skeletal mineralization, calcium and phosphate combine to form
The epiphysis of a growing long bone in a child will have two regions of cartilage
articular cartilage; epiphyseal plate
Which of the following features forms the chin?
Which of the following bones is part of the vertebral column?
Which of the following is the bone of the axial skeleton to which the pectoral girdle attaches?
Ribs 11 and 12 are called ______________ ribs since they don't articulate with the sternum.
Which of the following is associated with the onset of osteoporosis in older women?
estrogen deficiency due to menopause
The sphenoid and ethmoid bones make up the majority of the hard palate forming the roof of the mouth.
What is the main function of the intervertebral discs?
to provide the vertebral column with cushioning and flexibility
Which of the following features would you NOT expect to find on a thoracic vertebra?
- TRANSVERSE FORAMINA
- transverse processes
- costal facets
- spinous processes
The bone that supports your body weight when you are sitting down is the
Bones of the skull are joined along lines called
Which of the following is NOT one of the facial sinuses?
Prevention of osteoporosis includes adequate intake of
calcium and vitamin D
The ____________ arch of the foot extends from the heel to the big toe.
The left and right parietal bones are joined by the coronal suture.
Wolff's law describes how
the thickness and shape of a bone is dependent on the stresses placed upon the bone
Most fingers each have three _________________, but the thumb has only two.
Which of the following is a facial bone?
During fracture repair, formation of the soft callus is followed by
formation of the hard callus
Which of the following bones forms the medial aspect of the leg?
The head of the humerus articulates with the glennoid fossa of the scapula to form the shoulder joint.
The shoulder, hip, jaw, and elbow are all examples of _______________________ joints.
Which of the following is NOT a characteristic shared by all synovial joints?
- articular cartilage
- joint cavity
- joint capsule
What type of myofilament contains actin and attaches to the Z band of a sarcomere?
Which of the following muscles raises the eyebrows?
What is the function of T tubules in muscle contraction?
transmit the action potential deep into the muscle fiber
Each skeletal muscle only contains one type of skeletal muscle fiber.
The latissimus dorsi is a major adductor of the arm.
The functional unit of a muscle fiber extends from one Z disc to the next and is called a
Thick myofilaments are primarily made up of which of the following proteins?
Which of the following is NOT a function of skeletal muscle?
- maintain body posture
- generate heat
- MAINTAIN ELECTROLYTE HOMEOSTASIS
- move the limbs
A property common to all muscle cells is elasticity, which is the ability to increase in length.
Which of the following joints is stabilized by the anterior and posterior cruciate ligaments?
The chewing muscles that protract the mandible and produce side-to-side grinding movements are the
Which of the following muscles does NOT contribute to the rotator cuff?
- TERES MAJOR
- teres minor
The function of myoglobin in muscle cells is to
hold a reserve supply of oxygen in the muscle
Which of the following muscle functions is being fulfilled by a muscle that holds a bone or joint steady during movement?
Which of the following proteins can be found within a muscle fiber?
Muscles that require a great deal of precise control will have large motor units that include a great number of muscle fibers.
false, they will have smaller motor units
Internal and external rotation of the humerus is made possible by a _________________ joint.
ball and socket
The arm muscle that flexes and supinates the forearm is
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