More than one choice may apply.
Which of the following are correctly matched?
a. Short bone—wrist
b. Long bone—leg
c. Irregular bone—sternum
d. Flat bone—cranium
Introduction:
Bones form the major structures of the human body providing it rigidity and support. Based upon the structure, the bones are classified into a long bone, short bones, flattened bones, and irregular bones.
Answer to Problem 1MC
Correct answer:
The wrist, leg, and cranium are made of short, long, and flat bones, respectively.
Explanation of Solution
Explanation for the correct answers:
Option (a) is given that short bone is located at the wrist. They appear like cubes and spongy in nature, with an outer layer of compact bone. Short bones are mainly present in the wrist and ankles. Hence, option (a) is correct.
Option (b) is given that femur is a long bone. Long bones are those whose length is greater than their diameter. They have a long shaft and bulbous endings for the formation of joints. Hence, option (b) is correct.
Option (d) is given that cranium is a flat bone. Cranium is composed of a number of flat bones joined together. It is the top portion of the skull and protects the brain from external injury. It consists of frontal, temporal, occipital, parietal, sphenoid, and ethmoid bones. Hence, option (d) is correct.
Explanation for the incorrect answer:
Option (c) is given that sternum is an irregular bone. The sternum is a flat bone, which is the central axis of the rib cage in the thoracic cavity. So, it is an incorrect option.
Hence, option (c) is incorrect.
The short bones and the long bones are located at the wrist and ankles, and legs and arms, respectively. Cranium is made up of a flat bone, which in turn, comprises of many flat bones.
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Chapter 5 Solutions
Essentials of Human Anatomy & Physiology (12th Edition)
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