Question 1

Which statement best describes the difference between a muscle's origin and insertion?

Accepted Answer

Origin is the immovable (or less movable) bone, while insertion is the movable bone.

Question 2

A muscle that provides the major force for producing a specific movement is called the:

Accepted Answer

Prime mover

Question 3

Which muscle arrangement pattern is best described as a muscle with fascicles running parallel to the long axis of the muscle, such as the sartorius?

Accepted Answer

Parallel

Question 4

The biceps brachii and triceps brachii can act as antagonists to each other. If the biceps brachii is the prime mover for elbow flexion, what is the role of the triceps brachii during this movement?

Accepted Answer

Antagonist

Question 5

Which muscle is responsible for raising the eyebrows and wrinkling the forehead?

Accepted Answer

Frontal belly of epicranius

Question 6

A muscle named 'extensor carpi radialis longus' is most likely located:

Accepted Answer

On the radial side of the forearm

Question 7

Which of the following is a function of synergist muscles?

Accepted Answer

They help the prime mover by promoting the same movement or reducing undesirable movements.

Question 8

If a muscle is described as 'bipennate,' what does this indicate about its fascicle arrangement?

Accepted Answer

Fascicles are arranged on both sides of a central tendon, resembling a feather.

Question 9

Which muscle is the prime mover for tongue protrusion and helps prevent airway obstruction?

Accepted Answer

Genioglossus

Question 10

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

Accepted Answer

Orbicularis oculi

Question 11

Which of the following muscles is innervated by the facial nerve and inserts into the skin rather than bone?

Accepted Answer

Epicranius

Question 12

A muscle with a triangular or fan-shaped arrangement of fascicles, such as the pectoralis major, is classified as:

Accepted Answer

Convergent

Question 13

Which muscle is deep to the masseter and is important for whistling, sucking, and holding food in place during chewing?

Accepted Answer

Buccinator

Question 14

If a muscle is named 'rectus femoris,' what does the term 'rectus' indicate about its muscle fibers?

Accepted Answer

They run straight and parallel to the midline.

Question 15

Which muscle helps depress the mandible and tenses the skin of the neck?

Accepted Answer

Platysma

Question 16

A muscle with multiple origins, such as the triceps brachii, is described as:

Accepted Answer

Having multiple heads

Question 17

Which muscle retracts and elevates the tongue?

Accepted Answer

Styloglossus

Question 18

Which of the following is NOT a basic pattern of fascicle arrangement in skeletal muscles?

Accepted Answer

Circular

Question 19

A muscle that acts to prevent undesirable movements at a joint, such as stabilizing the wrist during finger flexion, is called a:

Accepted Answer

Synergist

Question 20

Which equation best represents the relationship between force, lever arm, and torque in muscle movement?

Accepted Answer

$$T = F 	imes r$$

Skeletal Muscle Structure, Function, and Nomenclature

Guida di studio - Domande di pratica

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