Question 1

Which fascicle arrangement in skeletal muscle is characterized by a broad, triangular-shaped muscle that tapers down into a single tendon, as seen in the pectoralis major?

Accepted Answer

Convergent

Question 2

A muscle that acts as a stabilizer by anchoring a bone and providing protection from injury due to unnecessary movements is called a:

Accepted Answer

Fixator

Question 3

Which of the following muscles is primarily responsible for elevating the mandible during chewing?

Accepted Answer

Masseter

Question 4

The mechanical advantage of a lever system in the human body is defined by the following equation. Which lever class has the fulcrum between the load and the applied force, and the load is moved in the opposite direction from the applied force?

$$	ext{Mechanical Advantage} = \frac{	ext{Length of Effort Arm}}{	ext{Length of Load Arm}}$$

Accepted Answer

First-class lever

Question 5

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

Accepted Answer

Epicranius (occipitofrontalis)

Question 6

A patient is unable to move their eye laterally. Which muscle is most likely impaired?

Accepted Answer

Lateral rectus

Question 7

Which abdominal muscle is responsible for compressing the abdominal contents and is the deepest of the abdominal wall muscles?

Accepted Answer

Transversus abdominis

Question 8

During swallowing, which group of muscles pushes food toward the pharynx?

Accepted Answer

Digastric, stylohyoid, mylohyoid, and geniohyoid

Question 9

Which muscle group is most critical for both locomotion and posture, running along the vertebral column and posterior ribs?

Accepted Answer

Erector spinae

Question 10

A muscle named 'levator scapulae' is named based on which principle?

Accepted Answer

The action it performs

Question 11

Which of the following is TRUE regarding the third-class lever system in the human body?

Accepted Answer

The applied force is between the fulcrum and the load

Question 12

Which muscle is involved in facial expressions that convey negative emotions such as anger and depression?

Accepted Answer

Depressor anguli oris

Question 13

If the origin of a muscle is on the scapula and the insertion is on the radius, which muscle is most likely being described?

Accepted Answer

Biceps brachii

Question 14

Which muscle is responsible for compressing the cheeks and is involved in manipulating food while chewing?

Accepted Answer

Buccinator

Question 15

Which of the following muscles is NOT part of the rotator cuff group?

Accepted Answer

Teres major

Question 16

A muscle that opposes the action of the agonist and allows for modulation and control of movement is called a:

Accepted Answer

Antagonist

Question 17

Which muscle is responsible for pulling the chin down when expressing sadness?

Accepted Answer

Platysma

Question 18

Which of the following is a circular fascicle arrangement that surrounds body openings?

Accepted Answer

Sphincter

Question 19

The diaphragm is primarily responsible for which function?

Accepted Answer

Respiration

Question 20

Which muscle is most involved in rotating the eyeball downward and laterally?

Accepted Answer

Superior oblique

Skeletal Muscle Structure, Function, and Major Muscle Groups

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