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ATI LPN · Anatomy and Physiology · Muscular System Exam Questions

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Which muscle has a convergent pattern of fascicles?

A. biceps brachii

B. gluteus maximus

C. pectoralis major

D. rectus femoris

Correct Answer: pectoralis major

Question 2 of 5

What causes the myosin binding site of an actin molecule to be exposed?

A. ATP attaching to the myosin cross-bridge

B. a nerve impulse reaching the motor end plate of a motor nerve

C. calcium ions attaching to troponin

D. acetylcholine crossing the neuromuscular junction

Correct Answer: calcium ions attaching to troponin

Question 3 of 5

What is the function of the erector spinae?

A. movement of the arms

B. stabilization of the pelvic girdle

C. postural support

D. rotating of the vertebral column

Correct Answer: postural support

Question 4 of 5

What structures attach a muscle to a bone?

A. a tendon

B. a fasciculus

C. a sarcomere

D. an internal intercostal

Correct Answer: a tendon

Question 5 of 5

The patient, who is a legal secretary, asks the nurse how she can avoid developing carpal tunnel syndrome. The nurse suggests:

A. exercising the wrist with repetitive flexion movements

B. wrapping the wrists with elastic bandages

C. acquiring a pad to support wrists while typing

D. applying warm compresses to wrists every evening

Correct Answer: acquiring a pad to support wrists while typing

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