PHGY 220 Chapter 11

The anterior border of the perineum is the anus. urethra. pubic symphysis. scrotum in the male and the labia majora in the female.

pubic symphysis.

You just ran over a skunk on your way to class. The odor was overwhelming and in response you wrinkled your nose in disgust by contracting your nasalis muscle. procerus muscle. depressor anguli oris. frontal belly of the occipitofrontalis muscle. occipital belly of the occipitofrontalis muscle.

procerus muscle.

The most laterally placed of the three erector spinae components, the ___________ group, is composed of three parts: cervical, thoracic, and lumbar. longissimus spinalis iliocostalis

iliocostalis

Which extrinsic eye muscle moves through a pulleylike loop? Inferior oblique Superior oblique Lateral rectus Medial rectus Superior rectus

Superior oblique

The pronator teres and pronator quadratus cause pronation of the forearm. What muscle opposes this movement? Pectoralis major Subscapularis Supinator Biceps brachii Triceps brachii

Supinator

Pharyngeal constrictor muscles are especially important for which function? Breathing Swallowing Expressing fright Chewing food Mixing food with enzymes

Swallowing

Which of the following is not one of the rotator cuff muscles? Teres major Teres minor Supraspinatus Infraspinatus Subscapularis

Teres major

If the right sternocleidomastoid contracts unilaterally, the resulting movement will be lateral flexion of the head to the right and rotation of the head to the left. lateral flexion of the head to the left and rotation of the head to the right. lateral extension of the head to the right and rotation of the head to the left. lateral extension of the head to the left and rotation of the head to the right.

lateral flexion of the head to the right and rotation of the head to the left.

Which extrinsic eye muscle is innervated by the abducens nerve (CN VI)? Inferior oblique Superior oblique Lateral rectus Medial rectus Superior rectus

Lateral rectus

You hear a sharp noise to your left causing you to shift your eyes in that direction. Which muscles were responsible for your glance? Left eye - lateral rectus, right eye - medial rectus Left eye - medial rectus, right eye - lateral rectus Left eye and right eye - lateral rectus Left eye and right eye - medial rectus Left eye - superior oblique, right eye - inferior oblique

Left eye - lateral rectus, right eye - medial rectus

Which muscles help us in the initial breakdown of food? Extrinsic eye muscles Muscles of mastication Muscles that move the tongue Muscles of facial expression Muscles of the pharynx

Muscles of mastication

What is a retinaculum? A flat band of muscle A wide aponeurosis A sliding tendon An area where several muscles converge A thickened fibrous band of fascia

A thickened fibrous band of fascia

Which muscle does not attach proximally to the ischial tuberosity? Biceps femoris Semimembranosus Adductor longus Semitendinosus Quadratus femoris

Adductor longus

If you had all of your fingers (including the thumb) spread out wide, which muscle or group would bring your thumb toward your first finger? Adductor pollicis Palmar interossei Dorsal interossei Lumbricals Abductor pollicis longus

Adductor pollicis

A nursing baby is using what muscle to suckle? Risorius Platysma Mentalis Levator labii superioris Buccinator

Buccinator

In the male, which muscle ejects urine or semen, compresses the base of the penis, and helps in formation of an erection? Iliococcygeus Superficial transverse perineal muscle External urethral sphincter Bulbospongiosus Pubococcygeus

Bulbospongiosus

These muscles elevate the ribs and have their origin on the inferior border of the superior rib and their insertion on the superior border of the inferior rib. Internal intercostals External intercostals Transversus thoracis Diaphragm Serratus posterior inferior

External intercostals

Which of the following elevates the ribs? External intercostals Internal intercostals Serratus posterior inferior Transversus thoracis

External intercostals

Which of the abdominal muscles has its fibers running in an inferomedial direction? Rectus abdominis Transversus abdominis Internal oblique External oblique None of these choices is correct.

External oblique

These two muscles are known as the triceps surae and together are the most powerful plantar flexors of all of the leg muscles. Tibialis posterior and popliteus Gastrocnemius and soleus Flexor digitorum longus and flexor hallucis longus Tibialis anterior and extensor digitorum longus Extensor hallucis longus and fibularis longus

Gastrocnemius and soleus

Which muscle does not move the mandible? Temporalis Masseter Lateral pterygoid Medial pterygoid Genioglossus

Genioglossus

Which muscle is used for sticking out the tongue? Hyoglossus Palatoglossus Styloglossus Hypoglossus Genioglossus

Genioglossus

All of these muscles, except one, have their proximal attachment on the scapula. Select the exception. Pectoralis major Coracobrachialis Triceps brachii Subscapularis Infraspinatus

Pectoralis major

Which muscle or group is responsible for adduction of the toes? Adductor hallucis Flexor hallucis brevis Plantar interossei Dorsal interossei Quadratus plantae

Plantar interossei

Which muscle "unlocks" the fully extended knee joint? Popliteus Tibialis posterior Tibialis anterior Gastrocnemius Soleus

Popliteus

With three seconds left on the clock, Mia breaks free and scores the winning goal in her soccer game. Of the muscles listed, select the one with the primary action in extending the leg for kicking. Biceps femoris Semimembranosus Sartorius Quadriceps femoris Tensor fasciae latae

Quadriceps femoris

Which muscle forms the traditional "six-pack" of a well-toned abdominal wall? Rectus abdominis Transversus abdominis Internal oblique External oblique Longissimus

Rectus abdominis

Which of the following muscles elevates and retracts (adducts) the scapula? Pectoralis minor Rhomboid major Subclavius Serratus anterior Scalenes

Rhomboid major

Which is the longest muscle of the body? Sartorius Gracilis Quadriceps femoris Biceps brachii Brachioradialis

Sartorius

Which muscle is the prime extensor of the elbow joint? Deltoid muscle Triceps brachii Biceps brachii Brachialis Brachioradialis

Triceps brachii

For axial muscles, which is usually a muscle's less movable attachment? The superior attachment site The inferior attachment site The proximal attachment site The distal attachment site

The inferior attachment site

What is the diamond-shaped region between the lower appendages called? The periosteum The pedundal triangle The perineum The posterior diaphragm The coccygeal triangle

The perineum

Which cranial nerve innervates the superior oblique muscle? The abducens nerve The trigeminal nerve The trochlear nerve The oculomotor nerve The glossopharyngeal nerve

The trochlear nerve

Which muscle is the primary dorsiflexor of the foot at the ankle? Tibialis anterior Extensor hallucis longus Fibularis brevis Extensor digitorum longus Gracilis

Tibialis anterior

The frontal belly of the occipitofrontalis muscle causes what action? Sneering Smiling Flaring the nostrils Wrinkling the brow (forehead) Frowning

Wrinkling the brow (forehead)

Of the muscles that move the glenohumeral joint, two attach proximally on the axial skeleton. Which ones?a: Latissimus dorsib: Deltoidc: Pectoralis majord: Teres majore: Coracobrachialis a and b a and c b and d c and e d and e

a and c

The principal elbow flexors located on the anterior side of the humerus are thea: biceps brachiib: brachialisc: brachioradialisd: deltoide: trapezius a, b, c b, c, d c, d, e a, c, e b, d, e

a, b, c

A muscle whose action opposes that of the prime mover is known as a(n) agonist. antagonist. synergist. extensor.

antagonist.

Muscles of the pectoral girdle attach proximally on the clavicle and scapula and attach distally on the axial skeleton. humerus and attach distally on the axial skeleton. axial skeleton and attach distally on the humerus. axial skeleton and attach distally on the clavicle and scapula. humerus and attach distally on the clavicle and scapula.

axial skeleton and attach distally on the clavicle and scapula.

For elbow flexion, biceps brachii is the agonist and triceps brachii is the antagonist. biceps brachii is the antagonist and triceps brachii is the agonist. triceps brachii is the synergist and biceps brachii is the antagonist. deltoid is the agonist and biceps brachii is the synergist. biceps brachii is the synergist and triceps brachii is the agonist.

biceps brachii is the agonist and triceps brachii is the antagonist.

The flexor digitorum longus is located in the deep layer of the posterior compartment of the leg, and it flexes toes 2-5. deep layer of the posterior compartment of the leg, and it flexes toes 1-3. superficial layer of the posterior compartment of the leg, and it flexes toes 2-5. superficial layer of the posterior compartment of the leg, and it flexes toes 1-3. anterior compartment of the leg, and it flexes toes 1-5.

deep layer of the posterior compartment of the leg, and it flexes toes 2-5.

The muscle that forms a partition between the thoracic and abdominal cavities is the scalenes. interspinales. internal intercostal. diaphragm. transversus thoracis.

diaphragm.

The intrinsic foot muscles form a __________ group and a _________ group. posterior, flexor anterior, posterior dorsal, plantar anterior, flexor dorsal, ventral

dorsal, plantar

The muscles of the anterior compartment of the leg function to dorsiflex the foot and extend the toes. dorsiflex the foot and flex the toes. plantarflex the foot and extend the toes. plantarflex the foot and flex the toes.

dorsiflex the foot and extend the toes.

Many of the muscles in the anterior compartment of the forearm work to _______ the wrist, and they have their proximal attachment on the _______ epicondyle of the humerus. flex, lateral flex, medial extend, lateral

flex, medial

When a child raises her hand to show you she is five years old, she is using all of the following muscles except the extensor digitorum. flexor digitorum. palmar interossei. lumbricals. dorsal interossei

flexor digitorum.

Of the muscles listed, the only one that inserts on the hyoid bone is the hyoglossus. palatoglossus. styloglossus. lateral pterygoid. genioglossus.

genioglossus.

Muscles whose functions are to depress either the hyoid bone or the thyroid cartilage of the larynx are the _________ muscles. mylohyoid suprahyoid infrahyoid stylohyoid

infrahyoid

The rhomboid muscle is named for its size. origin. fiber orientation. shape. action.

shape.

The word "biceps" in the name of a muscle refers to the fact that the insertion of the muscle is split into two parts. the muscle is shaped in two round sections, one after the other. the muscle has two tendons of origin. the muscle has two very different actions.

the muscle has two tendons of origin.