Question 1

Which type of fascicle arrangement is best suited for producing the greatest range of motion in a muscle?

Accepted Answer

Parallel

Question 2

A muscle that surrounds an external body opening, such as the orbicularis oris, is classified as which fascicle arrangement?

Accepted Answer

Circular

Question 3

In a lever system, if the effort arm is longer than the load arm, what is the mechanical outcome?

Accepted Answer

Mechanical advantage

Question 4

Which of the following best describes a third-class lever in the human body?

Accepted Answer

The effort is applied between the fulcrum and the load

Question 5

Which muscle compartment of the thigh is responsible for adducting the thigh and what is its primary nerve supply?

Accepted Answer

Medial compartment; obturator nerve

Question 6

A patient presents with difficulty flexing their forearm at the elbow. Which nerve is most likely affected?

Accepted Answer

Musculocutaneous nerve

Question 7

Which muscle is the prime mover (agonist) for flexion of the forearm at the elbow?

Accepted Answer

Biceps brachii

Question 8

During embryonic development, limb muscles arise from which structure?

Accepted Answer

Myotomes

Question 9

Which muscle is responsible for compressing the cheeks during chewing?

Accepted Answer

Buccinator

Question 10

If a muscle crosses on the lateral side of a joint, what movement does it generally produce?

Accepted Answer

Abduction

Question 11

Which of the following muscles is innervated by the facial nerve and is involved in closing the eyelids?

Accepted Answer

Orbicularis oculi

Question 12

Which muscle group is primarily responsible for maintaining the normal curvatures of the spine?

Accepted Answer

Erector spinae

Question 13

A muscle named 'flexor carpi radialis' tells you all of the following EXCEPT:

Accepted Answer

It extends the fingers

Question 14

Which of the following is a real-life example of a second-class lever in the human body?

Accepted Answer

Standing on tip-toe

Question 15

Which muscle is a synergist to the biceps brachii in flexing the forearm?

Accepted Answer

Brachialis

Question 16

Which of the following best describes the action of the diaphragm during inspiration?

Accepted Answer

It contracts and flattens, increasing thoracic volume

Question 17

A patient has lost the ability to abduct their arm at the shoulder. Which muscle is most likely paralyzed?

Accepted Answer

Deltoid

Question 18

Which muscle is NOT part of the quadriceps femoris group?

Accepted Answer

Biceps femoris

Question 19

Which compartment of the leg contains muscles that dorsiflex the foot and extend the toes?

Accepted Answer

Anterior compartment

Question 20

Which muscle is the primary mover for plantar flexion of the foot at the ankle?

Accepted Answer

Gastrocnemius

Muscles of the Body: Structure, Function, and Organization

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