Question 1

What do these three bones have in common-the humerus, ulna, and radius?&#10;A) They articulate at the wrist.&#10;B) They articulate at the elbow.&#10;C) They articulate at the glenoid cavity.&#10;D) They form a ball-and-socket joint.

Accepted Answer

At the distal end of the humerus are several processes that allow it to articulate with the bones of the forearm. The ulna is the second bone of the forearm. The longer of the two bones, the ulna, is located on the medial or little finger side of the forearm. It has processes and depressions that allow it to articulate with the humerus and radius proximally and with the radius distally. The olecranon process of the ulna is what you feel as the bony point of the elbow. The head of the radius articulates with the humerus and proximal ulna, whereas the distal end articulates with the distal ulna and the carpal or wrist bones. The radial tuberosity at the proximal end of the radius is the site of attachment for one of the muscles responsible for bending the forearm at the elbow.

Question 2

What do the following three structures have in common-elbow, knee, and interphalangeal joints?&#10;A) They are formed exclusively by short bones.&#10;B) They are ball-and-socket joints.&#10;C) They perform circumduction movement.&#10;D) They are hinge joints.

Accepted Answer

The hinge joint allows movement similar to the movement of two boards joined together by a hinge. The hinge allows movement in one direction, where the angle at the hinge increases or decreases. Hinge joints include elbows, knees, and fingers.

Question 3

What do the following three bones have in common-femur, humerus, and tibia?&#10;A) They are located in the lower extremity.&#10;B) They articulate with the acetabulum.&#10;C) They form ball-and-socket joints.&#10;D) They are long bones.

Accepted Answer

Long bones are longer than they are wide. They are found in the arms, forearms, palms, fingers, thighs, legs, and instep. Although it is obvious that the femur (thigh) and the humerus (arm) are long bones, even small bones such as the metacarpals and finger bones are considered long bones.

Question 4

Identify the following bone. It articulates distally with the carpal bones and proximally with the humerus.&#10;A) phalanges&#10;B) scapula&#10;C) clavicle&#10;D) ulna

Accepted Answer

The ulna has processes and depressions that allow it to articulate with the humerus and radius proximally and with the radius distally.

Question 5

Which of the following is most likely to increase bone density?&#10;A) excess parathyroid hormone activity&#10;B) osteoblastic activity&#10;C) bone marrow depression&#10;D) prolonged bed rest

Accepted Answer

Bone remodeling is accomplished by the combined actions of osteoblasts, which are bone-forming cells, and osteoclasts, which are bone-destroying cells.

Question 6

Which of the following is true of the femur?&#10;A) It contains the olecranon process.&#10;B) It articulates with the coxal bone at the acetabulum.&#10;C) It articulates with both the coxal bone and the coccyx.&#10;D) It is also called the shinbone.

Accepted Answer

The femur articulates proximally with the coxal bone to form the hip joint and distally with the bones of the leg to form the knee joint.

Question 7

Which of the following is not characteristic of vertebrae?&#10;A) They are stacked in a column and separated by discs of cartilage.&#10;B) They include the atlas and axis.&#10;C) They include the sacrum and coccyx.&#10;D) They include the body, manubrium, and xiphoid process.

Accepted Answer

The three parts of the sternum are the manubrium (man-OO-bree-ahm), body, and xiphoid (ZYE-foyd) process.

Question 8

Fontanels and unfused sutures in the infant skull:&#10;A) are abnormal.&#10;B) allow for the expansion of the skull for brain growth.&#10;C) occur only in the presence of maternal deprivation of calcium.&#10;D) close and fuse within the first month.

Accepted Answer

The fontanels are one reason why infant skull bones are more movable than those of the adult skull. Another reason is that the sutures of the infant skulls are not fused. Unfused sutures allow for the continued growth of the brain and skull after birth and throughout infancy.

Question 9

The cranium:&#10;A) contains all the bones of the skull.&#10;B) includes the sphenoid, the occipital bone, and the zygomatic bone.&#10;C) houses the brain.&#10;D) includes the occipital bone, the atlas, and the axis.

Accepted Answer

The cranium is a bony structure that encases and protects the brain.

Question 10

Which of the following are aligned parallel to each other?&#10;A) femur and tibia&#10;B) tibia and calcaneus&#10;C) fibula and patella&#10;D) tibia and fibula

Accepted Answer

The fibula is a long, thin bone positioned laterally alongside the tibia in the leg.

Deck 8: Skeletal System