Question 1

Lateral rotation of the eyeball is facilitated by the ________.&#10;A) superior rectus, inferior rectus, and lateral rectus muscles&#10;B) superior oblique, lateral rectus, and inferior oblique muscles&#10;C) superior rectus, medial rectus, and inferior rectus muscles&#10;D) lateral rectus and medial rectus muscles

Accepted Answer

Lateral rotation of the eyeball is facilitated by the lateral rectus muscle, which is innervated by the abducens nerve, and the superior oblique and inferior oblique muscles, which are innervated by the trochlear nerve. The superior rectus, inferior rectus, medial rectus muscles are responsible for different eye movements than lateral rotation.

Question 2

Identify the prime mover that facilitates the action described in the following situation: After receiving positive feedback from your anatomy professor,the corners of your mouth elevate as you smile with delight.

A) depressor anguli oris
B) orbicularis oris
C) zygomaticus major
D) zygomaticus minor

C

Accepted Answer

The prime mover that facilitates the action of elevating the corners of the mouth in a smile is the zygomaticus major muscle. It originates from the zygomatic bone and inserts on the corner of the mouth, allowing it to elevate and pull back when contracted. The other options listed are muscles involved in facial expression, but they do not specifically facilitate the action described in the situation.

Question 3

During a focused breathing exercise,you feel your ribs elevate as you inhale.Which muscle or muscle group is responsible for this action?&#10;A) internal intercostal muscles&#10;B) external intercostal muscles&#10;C) the transversus thoracis muscle&#10;D) the diaphragm

Accepted Answer

The external intercostal muscles are responsible for elevating the ribs during inhalation. The internal intercostal muscles aid in exhalation by depressing the ribs. The transversus thoracis muscle is a deep muscle that aids in exhalation, while the diaphragm is the primary muscle responsible for inhalation by contracting and descending, creating a vacuum effect that draws air into the lungs.

Question 4

Upon arriving in your anatomy lab,you drop your pencil.Identify the muscle that allows for flexion of the vertebral column,allowing you to bend at the waist to retrieve the pencil.&#10;A) transversus abdominis&#10;B) external oblique&#10;C) internal oblique&#10;D) rectus abdominis

Accepted Answer

The rectus abdominis muscle is primarily responsible for flexing the vertebral column, which allows you to bend forward at the waist. This action is necessary for movements such as bending down to pick up a pencil from the floor.

Question 5

An antagonist ________.&#10;A) opposes a specific action&#10;B) serves as the fixed attachment of a muscle&#10;C) promotes or facilitates a specific action&#10;D) is also known a prime mover. Contraction results in a specific action

Accepted Answer

An antagonist opposes a specific action. In muscle physiology, an antagonist muscle works in opposition to the agonist muscle to control a movement. In the context of storytelling or literature, an antagonist is a character or force that opposes the main character or protagonist.

Question 6

________ attach muscles to bones.&#10;A) Cartilages&#10;B) Cords&#10;C) Tendons&#10;D) Ligaments

Accepted Answer

Tendons attach muscles to bones, allowing movement and stability in the skeletal system. Cartilages, cords, and ligaments have different functions and attachments in the body.

Question 7

An agonist ________.&#10;A) opposes a specific action&#10;B) promotes or facilitates a specific action&#10;C) serves as the fixed attachment of a muscle&#10;D) is also known as a prime mover. Contraction results in a specific action

Accepted Answer

The answer of An agonist ________.&#10;A) opposes a specific action&#10;B)...

Question 8

Identify the muscle or muscles that facilitate the action described in the following situation: During a trip to New York City,you whistle loudly to hail a taxicab.&#10;A) buccinator, mentalis&#10;B) buccinator, orbicularis oris&#10;C) buccinator, depressor anguli oris&#10;D) buccinator

Accepted Answer

Whistling requires the contraction of the buccinator muscle to create a small opening of the lips and the orbicularis oris muscle to shape the lips into a rounded position. Therefore, the muscle(s) that facilitate the action described in the situation is/are the buccinator and orbicularis oris muscles. Among the answer choices, only B includes both muscles.

Question 9

The muscles of the head,neck,and trunk are referred to as the ________ muscles.&#10;A) smooth&#10;B) appendicular&#10;C) axial&#10;D) skeletal

Accepted Answer

The muscles of the head, neck, and trunk are collectively known as axial muscles. This is because they are located along the central axis of the body and are primarily responsible for core stability, posture, and movement of the spine and ribcage. Smooth muscles are located in various internal organs, appendicular muscles are those that move the limbs, and skeletal muscles are the voluntary muscles in the body.

Question 10

Contraction of muscle results in movement because ________.&#10;A) at a joint, the bone acts as a pulley and the joint serves as a lever&#10;B) at a joint, the bone acts as a lever, the joint serves as a fulcrum, and effort is generated by muscle attached to bone&#10;C) at a joint, the bone acts as a fulcrum and the joint serves as a pulley&#10;D) at a joint, the bone acts as a fulcrum and the joint serves as a lever

Accepted Answer

When a muscle contracts, it generates a force that pulls on a bone. This bone acts as a lever and the joint serves as a fulcrum. The effort generated by the muscle causes movement around the joint. This is known as the lever system of movement, which is best described by option B.

Question 11

The diaphragm ________.&#10;A) originates and inserts on the ribs&#10;B) is the primary muscle of respiration&#10;C) elevates the ribs&#10;D) depresses the ribs

Accepted Answer

The answer of The diaphragm ________.&#10;A) originates and inserts on...

Question 12

An aponeurosis is most similar to a ________.&#10;A) muscle&#10;B) ligament&#10;C) bone&#10;D) tendon

Accepted Answer

The answer of An aponeurosis is most similar to a...

Question 13

Muscles of the head ________.&#10;A) play an important role in breathing&#10;B) facilitate movement of the facial features and promote mastication&#10;C) allow voluntary eye movements&#10;D) extend, laterally flex, and rotate the head

Accepted Answer

The answer of Muscles of the head ________.&#10;A) play an...

Question 14

Identify the prime mover that facilitates the action of your nostrils in the following situation: After a particularly vigorous exercise class,your strong breathing is accompanied by flaring of the nostrils.

A) nasalis
B) frontalis
C) mentalis
D) procerus

Accepted Answer

The answer of Identify the prime mover that facilitates the...

Question 15

Describe the relationship between the origin and insertion of a muscle.&#10;A) The origin remains fixed and the insertion moves toward the origin during contraction.&#10;B) Both the origin and insertion move when a muscle contracts.&#10;C) The insertion remains fixed and the origin moves toward the origin during contraction.&#10;D) There is no relationship between the origin and insertion.

Accepted Answer

The answer of Describe the relationship between the origin and...

Question 16

Which of the following muscles is NOT involved in mastication?&#10;A) frontalis&#10;B) masseter&#10;C) temporalis&#10;D) lateral pterygoid

Accepted Answer

The answer of Which of the following muscles is NOT...

Question 17

Identify the prime mover that facilitates the action of your nostrils in the following situation: After a particularly vigorous exercise class,your strong breathing is accompanied by flaring of the nostrils.

A) nasalis
B) frontalis
C) mentalis
D) procerus

Accepted Answer

The answer of Identify the prime mover that facilitates the...

Question 18

Identify the muscle or muscles responsible for the voluntary tongue movement necessary to facilitate swallowing.&#10;A) styloglossus, tensor veli palatine, and laryngeal elevators&#10;B) genioglossus, hyoglossus, and superior pharyngeal constrictor&#10;C) palatoglossus, levator veli palatini, and styloglossus&#10;D) palatoglossus, styloglossus, genioglossus, and hyoglossus

Accepted Answer

The answer of Identify the muscle or muscles responsible for...

Question 19

A synergist ________.&#10;A) serves as the fixed attachment of a muscle&#10;B) assists the action of the agonist&#10;C) opposes a specific action&#10;D) is also known a prime mover. Contraction results in a specific action

Accepted Answer

The answer of A synergist ________.&#10;A) serves as the fixed...

Question 20

Inability to control (stop/start)the flow of urine may suggest ________.&#10;A) a weak external oblique muscle&#10;B) a weak spinalis muscle&#10;C) a weak pubococcygeus muscle&#10;D) weak intercostal muscles

Accepted Answer

The answer of Inability to control (stop/start)the flow of urine...

Deck 11: Muscles of the Head, Neck, and Trunk