Week 9 Quiz

An adult skeleton has 206 bones. How are they split between the two divisions?

Select one.

• 80 axial and 126 appendicular
• 86 axial and 120 appendicular, with the girdles counted as axial
• 126 axial and 80 appendicular
• 80 axial and 120 appendicular, with the girdles left out

A study card asks which division the scapula belongs to. Which answer, with its reason, is correct?

Select one.

• Axial, because it sits on the trunk beside the ribs
• Appendicular, because it attaches the arm to the axial skeleton
• Axial, because it is a flat bone like the sternum
• Appendicular, because it is one of the long bones of the arm

Which list gives the vertebrae of the vertebral column by region, from the top down?

Select one.

• 12 cervical, 7 thoracic, 5 lumbar
• 7 cervical, 5 thoracic, 12 lumbar
• 7 cervical, 12 thoracic, 5 lumbar
• 5 cervical, 12 thoracic, 7 lumbar

Each limb has 30 bones, and the appendicular skeleton has 126. After the four limbs are counted, how many bones are left, and which are they?

Select one.

• 4 bones: the 2 clavicles and the 2 scapulae
• 6 bones: the 2 clavicles, the 2 scapulae, and 2 ribs
• None, because the girdles belong to the axial skeleton
• 6 bones: the 2 clavicles, the 2 scapulae, and the 2 hip bones

A person stands in the anatomical position, palms facing forward. Which forearm bone lies on the thumb side?

Select one.

• The radius, because the thumb is lateral
• The ulna, because the thumb is medial
• The ulna, because it is the larger forearm bone
• The humerus, because it runs down to the thumb

Which bone of the leg, between the knee and the ankle, carries the body's weight?

Select one.

• The fibula, the lateral bone of the leg
• The tibia, the medial bone of the leg
• The fibula, the medial bone of the leg
• The tibia, the lateral bone of the leg

How is a suture between two skull bones classified by structure and by function?

Select one.

• A synovial joint and a diarthrosis
• A cartilaginous joint and an amphiarthrosis
• A fibrous joint and a synarthrosis
• A fibrous joint and a diarthrosis

Which part of a synovial joint secretes the synovial fluid that lubricates the joint and nourishes the cartilage?

Select one.

• The articular cartilage on each bone end
• The ligaments that steady the joint
• The outer fibrous layer of the articular capsule
• The synovial membrane lining the capsule

True or false: lifting the arm straight out to the side, away from the midline, is flexion at the shoulder.

True or false.

• True
• False

Select every true statement about this week's joints.

Select every option that applies.

• Every synovial joint is a diarthrosis.
• The hip and the shoulder are the only ball-and-socket joints.
• The shoulder's shallow socket lets the arm swing freely, and it dislocates easily.
• A suture has a fluid-filled joint cavity.
• The elbow is a ball-and-socket joint.