MasteringA&P 6.7-6.8

How many thoracic vertebrae are found in the human body?

12

How many fused components make up the sacrum?

5

How many lumbar vertebrae are found in the human body?

5

Which part of the rib indicates the site where the tubular body, or shaft, begins curving toward the sternum?

Angle

Which vertebra is referred to as the axis?

C2

Which vertebral region permits a relatively greater degree of flexibility, through the interlocking vertebral bodies, than do other regions?

C3-C7

Which of the following statements regarding vertebral regions is correct?

During development, the sacrum originates as a group of five vertebrae, whereas the coccyx begins as three to five very small vertebrae.

Which vertebral column disorder involves an exaggerated thoracic curve, resulting in a round-back appearance?

Kyphosis

Compression fractures or compression-dislocation fractures, that occur after a hard fall, most often involve which vertebrae?

L1-L2 and T12

When a person stands holding a heavy object, which spinal curve is exaggerated to prevent toppling forward?

Lumbar

Which of the following statements regarding lumbar vertebrae is FALSE?

Lumbar vertebrae have the largest of the vertebral foramina among the vertebral regions.

Which of the following describes the vertebral body of the lumbar vertebrae?

Massive, oval, flat faces

Which portion of ribs 1-10 contacts the transverse process of a thoracic vertebra?

The inferior portion of the tubercle, via an articular facet

Which of the following statements about the sternum is FALSE?

The muscular diaphragm and the external oblique muscles plus the rectus abdominis attach to the xiphoid process.

Which of the following spinal curves are considered to be "primary curvatures" because they appear late in fetal development?

Thoracic and sacral curve

The thoracic cage consists of __________.

Thoracic vertebrae, rib cage, sternum

Which vertebral structure transfers weight along the axis of the vertebral column?

Vertebral body

Rib pairs 2-7 attach to which part of the sternum?

body

The __________ vertebrae support the skull, stabilize relative positions of brain and spinal cord, and allow controlled head movement.

cervical

Ribs 11 and 12 are specifically called __________ ribs.

floating

Which vertebral processes project laterally or dorsolaterally and are sites of muscle attachments, as well as sites of rib articulation in the thoracic area?

transverse processes