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The Muscular System

The long head of the biceps femoris muscle originates on the ischial tuberosity
Both heads of the biceps femoris muscle flex the leg at the knee
The biceps femoris is located in the posterior thigh
The two heads of the biceps brachii combine to insert on the radial tuberosity
The anterior muscles of the thigh that originate on the os coxae are sartorius; rectus femoris
All fibers of the pectoralis major muscle converge on the lateral edge of the intertubercular sulcus
True or False: The anterior axial muscle that crosses the glenohumeral joint is the pectoralis major muscle. True
The posterior axial muscle that crosses the glenohumeral joint is the latissimus dorsi
The deltoid muscle fibers are separated into anterior, middle, and posterior
The middle fibers of the deltoid muscle abduct the arm
The origin of the external obliques includes ribs five through twelve
The origins of the lateral head of the gastrocnemius muscle are the lateral condyle and posterior surface of the femur
The gastrocnemius muscle is innervated by the tibial nerve
The two heads of the gastrocnemius muscle converge to insert onto the calcaneus
The majority of the fibers of the gluteus maximus insert onto the ileotibial tract
The gluteus maximus is the most powerful muscle during extension
The actions of the internal obliques include compression of the abdomen to assist in forced expiration
The latissimus dorsi inserts on the intertubercular groove of the humerus
One of the actions of the latissimus dorsi muscle is to adduct the arm
The masseter muscle originates on the medial surfaces of the maxilla and the zygomatic arch as well as the inferior border of the zygomatic arch
The masseter is innervated by the _____________ branch of the trigeminal nerve. mandibular
The muscle that generates the most power during elbow flexion is the brachialis
The prime mover of elbow extension is the triceps brachii
The actions of the muscles that cross the hip do not include inversion
The origins of the rectus abdominus muscle are on the pubic bone
The origin of the rectus femoris is the anterior inferior iliac spine
The rectus femoris muscle extends the leg at the knee
A prime mover (agonist) is primarily responsible for a movement
Muscles are named based on all the criteria below except color of muscles
This large, fan-shaped muscle of the upper chest is the prime mover of arm flexion. pectoralis major
Commonly referred to as the ________, this muscle group on the posterior thigh extends the hip. hamstring
This name reveals the number of the muscle's origins. triceps brachii
The names of these muscles tell you their actions. adductor magnus and extensor digitorum
A muscle that is responsible for producing a particular movement is a(n) agonist
Skeletal muscles are named on the basis of size, length ,location and shape of the muscle
When a muscle contracts, the __________ moves toward the __________. insertion; origin
Which of the following is NOT a general action of the muscles of the upper limb? wrist and hand movement forearm movement elbow movement stabilization of the clavicle stabilization of the clavicle
Fixator muscles function to immobilize the origin of a prime mover
A synergistic muscle would aid a(n) agonist
The temporalis muscle is palpable when you clench your teeth
what muscle helps with puckering the lips orbicularis oris
what muscle helps with blinking and squinting orbicularis oculi
what muscle helps with compressing the cheek buccinators
what muscle helps with smiling zygomaticus major and minor
what muscle helps with raising the eyebrows epicranius frontal belly
what muscle helps with rotating the head sternocleidomastoid
what muscle is located in the shoulder deltoid
what muscle is located in the upper chest pectoralis major
what muscle is located in the medial abdominal region rectus abdominis
what muscle is located in the superficial lateral abdominal region external oblique
what muscle is located in the thoracic floor diaphragm
The major adductor of the arm is the latissimus dorsi
The prime mover of arm abduction is the deltoid
Which muscle is the prime mover for arm flexion? pectoralis major
triceps brachii is responsible for what function elbow extension
biceps brachii is responsible for what function elbow flexion
flexor carpi radialis is responsible for what function wrist flexion
extensor digitorum is responsible for what function finger extension
gastrocnemius is responsible for what function plantar flexion
tibialis anterior is responsible for what function dorsiflexion
flexor hallucis longus is responsible for what function great toe flexion and foot inversion
extensor digitorum longus is responsible for what function toe extension
tibialis posterior is responsible for what function foot inversion
gluteus maximus is responsible for what function hip extension: stair climbing
rectus femoris is responsible for what function knee extension: thigh flexion
gluteus medius is responsible for what function thigh abduction
biceps femoris is responsible for what function thigh extension
The bundles of muscle fibers within a skeletal muscle are called fascicles
True or False Levers make muscle action more versatile by all changing the location of the muscle’s insertion Fasle
The more movable end of a muscle is the insertion
The muscles of facial expression are innervated by cranial nerve VII
The strongest masticatory muscle is the ___________ muscle. masseter
The muscle that rotates the eye medially is the ___________ muscle medial rectus
Important flexors of the vertebral column that act in opposition to the erector spinae are the ___________ muscles. rectus abdominis
The major extensor of the elbow is the ___________ muscle. triceps brachii
The muscles that rotate the radius without producing either flexion or extension of the elbow are the ___________ muscles. pronator teres and supinator
The powerful flexors of the hip are the ___________ muscles. (a) piriformis, (b) obturator, (c) pe iliopsoas
Knee extensors known as the quadriceps consist of the three vastus muscles and the rectus femoris muscle
List the four fascicle organizations that produce the different patterns of skeletal muscles. parallel, convergent, pennate, and circular
What is an aponeurosis? a collagenous sheet connecting two muscles
What are two examples of an aponeurosis? epicranial aponeurosis and linea alba
Which four muscle groups make up the axial musculature? muscles of the head and neck, muscles of the vertebral column, oblique and rectus muscles, and muscles of the pelvic floor.
What three functions are accomplished by the muscles of the pelvic floor? ) support the organs of the pelvic cavity, (2) flex joints of the sacrum and coccyx, and (3) control movement of materials through the urethra
On which bones do the four rotator cuff muscles originate and insert? The supraspinatus, infraspinatus, and teres minor originate on the posterior body of the scapula, and the subscapularis originates on the anterior body of the scapula. All four muscles insert on the humerus.
What three functional groups make up the muscles of the lower limbs? (1) muscles that move the thigh, (2) muscles that move the leg, and (3) muscles that move the foot and toes.
Of the following actions, the one that illustrates that of a second-class lever is ankle extension
True or False: Compartment syndrome can result from compressing a nerve in the wrist False
Compartment syndrome can result from: compartments swelling with blood due to an injury involving blood vessels, torn ligaments in a given compartment, pulled tendons in the muscles of a given compartment, torn muscles in a particular compartment.
A(n) ___________ develops when an organ protrudes through an abnormal opening. hernia
Elongated bursae that reduce friction and surround the tendons that cross the dorsal and ventral surfaces of the wrist form ___________. synovial tendon sheaths
Muscle fibers in a skeletal muscle form bundles called fascicles
Created by: Charon514