Question

1. part a

how many bones make up the adult skull?
○ 5
○ 22
○ 7
○ 12

2.
part a
which bone forms the anterior cranium?
○ palatine bone
○ sphenoid bone
○ temporal bone
○ frontal bone

3.
part a
when looking at the range of motion of the various sections of the vertebral column the ______ has the most flexibility.
○ thoracic spine
○ cervical spine
○ lumbar spine
○ sacral spine

4.
part a
costal cartilages join most ribs to the sternum.
○ true
○ false

5.
part a
the glenohumeral joint that articulates the humerus to the pectoral girdle is a highly mobile joint. this mobility comes at a cost because ______.
○ muscles that span this mobile joint will only provide a reduced amount of power
○ the joint is relatively unstable and can easily dislocate
○ these type of joints are harder to control and can easily be cut off by the free range of motion and coordinate
○ the blood vessels that lead to the arm and hand can easily be cut off

Explanation:

Question 1

The adult skull is composed of 22 bones (8 cranial and 14 facial). So the correct option is the one with 22.

The frontal bone forms the anterior (front) part of the cranium. The palatine is facial, sphenoid is central/cranial but not anterior, temporal is lateral.

The cervical spine (neck region) has the most flexibility among vertebral column sections. Thoracic is rigid (rib attachment), lumbar is less flexible than cervical, sacral is fused.

Answer:

C. 22 (assuming the options are labeled A:5, B:22, C:7, D:12; if labels differ, adjust but the value is 22)

Question 2