Human Anatomy Weekly Quiz 4

Muscle, Head & Neck, and Back

What type of muscle fiber is the slowest to fatigue and stores oxygen?

slow oxidative

Where is cardiac muscle found in the body?

myocardium

How many nuclei are found in a cardiac muscle cell?

one

What do the smallest units of skeletal muscle form when added together?

myofibrils

What is the most inferior of the muscles that pull the upper lip superiorly?

zygomaticus major

What muscle of facial expression pulls the upper lip superiorly and exposes the upper teeth?

zygomaticus minor

What axial muscle is superior to the mental region?

orbicularis oris

What is the action when only the muscles on one side of the posterior neck contract?

the head rotates to the same side

What is the insertion of the most superior/medial muscle of mastication?

coronoid process of the mandible

What is the most lateral group in the erector spinae group?

iliocostalis group

What bones form the right squamous suture?

right parietal and right temporal bones

What is found is between the two large bony structures on the proximal area/anterior view of the bone of the brachium?

intertubercular sulcus of the humerus

What does the superior articulating surface of the posterior bone of the pectoral girdle articulate with? Be as specific as possible.

acromial end of the clavicle

What is the name of a tendon that has a sheet-like arrangement?

aponeurosis

What muscle tissue is non-striated?

smooth muscle tissue

What is the name of the dense irregular connective tissue sheath that surrounds a skeletal muscle fascicle?

perimysium

What muscle fiber does not store oxygen?

fast glycolytic

What muscle is medial to the most inferior of the muscles of mastication?

buccinator

What is an action of the axial muscle that forms the cheek?

moves food medially between the molars

What muscle of mastication inserts on the mastoid process of the temporal bone?

none

What is the most superficial muscle of the lower to middle back?

latissimus dorsi

What bones form the right squamous suture?

right parietal and right temporal bones

Starting from the lateral border, what is the second carpal bone in the proximal row?

lunate

What carpal bone cannot be seen from the posterior view?

pisiform

What do we call muscles that oppose the actions of a prime mover?

antagonists

What muscle fiber contains some myoglobin but is not the slowest to fatigue?

fast oxidative

What is the most inferior muscle that pulls the lower lip and, to some extent, the mandible, inferiorly?

platysma

What is the most inferior section of the sternum?

xiphoid process of the sternum

What is the most inferior/anterior structure of the os coxae where muscles attach?

pubic tubercle of the pubis

What is the most inferior/posterior structure of the os coxae?

ischial tuberosity of the ischium

What muscle fibers are fastest to fatigue?

fast glycolytic

What is the union between cardiac muscle cells called?

intercalated disc

What protein in muscle fibers saves oxygen?

myoglobin

When a skeletal muscle crosses a joint, the bone that moves the least is called what?

origin

What muscle is inferior to the superior/anterior of the axial muscles?

orbicularis oculi

What paranasal sinus is found in a facial bone?

maxillary sinus

What is found running the length of the shaft in the posterior view of the bone of the thigh?

linea aspera of the femur

What is the structure that is proximal/anterior/midline and is inferior to the articulating structures of the medial bone of the leg?

tibial tuberosity of the tibia

In naming a muscle, what is the term that indicates that the muscle fibers are arranged in a circular fashion?

orbicularis

What structure is inferior/medial to the neck of the lateral bone of the antebrachium?

radial tuberosity of the radius