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ATI LPN · Anatomy and Physiology · Multiple Choice Questions About Skeletal System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

The site where a motor neuron meets a muscle fiber to initiate muscle contraction is known as the:

A. Synaptic cleft

B. Axon terminal

C. Neuromuscular junction

D. Sarcomere

Correct Answer: Neuromuscular junction

Question 2 of 5

The head of the humerus articulates with the glenoid cavity of the:

A. femur

B. radius

C. os coxa

D. scapula

Correct Answer: scapula

Question 3 of 5

Which of the following describes the movements known as pronation and supination?

A. The flexing of the arm with respect to the forearm around the elbow.

B. The swivelling of the foot to the medial and lateral directions.

C. The twisting of the wrist while the elbow is held motionless.

D. The rotation at the shoulder that causes the arm to describe a cone shape.

Correct Answer: The twisting of the wrist while the elbow is held motionless.

Question 4 of 5

How do synovial joints differ from the other types of bone articulation?

A. they have a joint cavity.

B. the bones are joined by fibrous tissue.

C. the articulating bones are joined by cartilage.

D. the articulating bone surfaces are covered by tendons.

Correct Answer: they have a joint cavity.

Question 5 of 5

Which one of the following bones is not part of the Axial Skeleton?

A. Vertebrae

B. Sternum

C. Ulna

D. Ribs

Correct Answer: Ulna

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