Question 1

Which of the following best describes the function of a muscle's origin and insertion?

Accepted Answer

The origin is typically the immovable or less movable attachment, while the insertion is the movable attachment.

Question 2

A muscle with fascicles arranged in concentric rings is best suited for which function?

Accepted Answer

Closing body openings, such as the mouth or eyes

Question 3

Which muscle arrangement is most likely to generate the greatest force, and why?

Accepted Answer

Multipennate, because it contains many fibers converging on a single tendon, increasing cross-sectional area

Question 4

During elbow flexion, which muscle acts as the antagonist to the biceps brachii?

Accepted Answer

Triceps brachii

Question 5

A patient is unable to close their eyelids tightly. Which muscle is most likely affected?

Accepted Answer

Orbicularis oculi

Question 6

Which of the following best describes the role of synergist muscles?

Accepted Answer

They stabilize the origin of the prime mover and assist in the same movement.

Question 7

A muscle named 'flexor carpi radialis longus' can be inferred to:

Accepted Answer

Flex the wrist on the radial side and is a long muscle

Question 8

Which muscle is the prime mover for jaw closure during mastication?

Accepted Answer

Masseter

Question 9

If a patient has difficulty elevating their shoulders (shrugging), which muscle is most likely weakened?

Accepted Answer

Trapezius

Question 10

Which of the following muscles is a major contributor to inspiration by increasing the volume of the thoracic cavity?

Accepted Answer

Diaphragm

Question 11

A muscle with the name 'sternocleidomastoid' indicates which of the following about its attachments?

Accepted Answer

It originates on the sternum and clavicle and inserts on the mastoid process.

Question 12

Which muscle arrangement is best suited for producing a wide range of motion but less power?

Accepted Answer

Parallel

Question 13

A patient presents with difficulty in chewing and keeping food between their teeth. Which muscle is most likely impaired?

Accepted Answer

Buccinator

Question 14

Which of the following muscles is primarily responsible for arm abduction at the shoulder joint?

Accepted Answer

Deltoid

Question 15

If the external intercostal muscles are paralyzed, what would be the most immediate effect on respiration?

Accepted Answer

Inspiration would be impaired due to inability to elevate the rib cage.

Question 16

Which muscle group is the prime mover for back extension and helps maintain erect posture?

Accepted Answer

Erector spinae

Question 17

A muscle named 'adductor magnus' is most likely to:

Accepted Answer

Adduct the thigh and is a large muscle

Question 18

Which of the following best explains why pennate muscles can generate more force than parallel muscles of the same size?

Accepted Answer

Pennate muscles have more fibers packed into a given muscle volume, increasing cross-sectional area.

Question 19

A patient is unable to rotate their head to the left. Which muscle is most likely affected?

Accepted Answer

Right sternocleidomastoid

Question 20

Which muscle is primarily responsible for compressing the abdominal contents and increasing intra-abdominal pressure during activities such as coughing or vomiting?

Accepted Answer

Transversus abdominis

Anatomy of the Muscular System: Structure, Attachments, and Fascicle Arrangement

Guida di studio - Domande di pratica

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