A&P Chapter 10

Which of the following statements is correct regarding muscle position and its related action? A muscle that crosses on the posterior side of the knee joint produces flexion. The latissimus dorsi crosses the posterior side of the shoulder joint to produce flexion. A muscle that crosses the ankle joint anteriorly produces flexion. The pectoralis major crosses on the anterior side of the shoulder joint to produce extension.

Which of the following statements is correct regarding muscle position and its related action? The teres major crosses on the medial side of the shoulder joint to produce adduction. A muscle that crosses the ankle joint posteriorly produces adduction. The deltoid crosses the shoulder joint medially to produce abduction. A muscle that crosses on the lateral side of the hip joint produces adduction.

________ are the muscles primarily responsible for producing a particular movement.

Which functional group has the major responsibility for producing a specific movement? fixators antagonists agonists synergists

Which of the following is NOT used as a criterion for naming muscles? whether the muscle is controlled by the involuntary or voluntary nervous system the number of origins for the muscle the shape of the muscle the locations of the muscle attachments the location of the muscle

Which of the following is CORRECTLY matched? pennate arrangement of fascicles: spindle-shaped muscle parallel arrangement of fascicles: characteristic of sphincter muscles circular arrangement of fascicles: describes the deltoid muscle convergent arrangement of fascicles: fan shaped muscle

Most skeletal muscles of the body act in ________. third-class lever systems power lever systems second-class lever systems first-class lever systems

true or false The more a muscle shortens during a contraction, the greater the power of the muscle.

Which of the following movements demonstrates a first-class lever? standing on your toes lifting a rock with your right hand and arm raising your head up off your chest flexing your knee to raise your heel toward your buttocks

The anterior muscles of the thigh that originate on the os coxae are __________. sartorius; rectus femoris sartorius; vastus medialis rectus femoris; vastus medialis vastus lateralis; vastus medialis

The two heads of the biceps brachii combine to insert on the __________. ulnar notch radial notch radial tuberosity olecranon process

Both heads of the biceps femoris muscle __________. extend the hip extend the leg at the knee flex the leg at the knee flex the hip

The long head of the biceps femoris muscle originates on the __________. posterior superior iliac spine ischial tuberosity iliac crest anterior superior iliac spine

The biceps femoris is located in the __________. posterior arm posterior thigh anterior thigh anterior arm

The deltoid muscle fibers are separated into __________. superficial and deep anterior, middle, and posterior superior, middle, and inferior lateral, medial, and proximal

The middle fibers of the deltoid muscle __________. abduct the arm adduct the arm medially rotate the arm laterally rotate the arm

The origin of the external obliques includes ribs __________. five through twelve eight through twelve seven through twelve six through twelve

The origins of the lateral head of the gastrocnemius muscle are the __________. medial condyle and posterior surface of the femur patellar surface and posterior surface of the femur lateral condyle and posterior surface of the femur patellar surface and anterior surface of the femur

The gastrocnemius muscle is innervated by the __________. ulnar nerve tibial nerve plantar nerve fibular nerve

The two heads of the gastrocnemius muscle converge to insert onto __________. the middle phalanx of digit one digits two through five the posterior surface of the tibia the calcaneus

The majority of the fibers of the gluteus maximus insert onto the __________. inferior border of the os coxae gluteal tuberosity ileotibial tract superior border of the os coxae

The gluteus maximus is the most powerful muscle during __________. flexion lateral rotation medial rotation extension

The latissimus dorsi inserts __________. on the lesser tubercle of the humerus on the intertubercular groove of the humerus on the deltoid tuberosity of the humerus on the greater tubercle of the humerus

One of the actions of the latissimus dorsi muscle is to __________. abduct the arm flex the arm adduct the arm lateral rotation of 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 medial and lateral surfaces of the maxilla and the inferior and superior border of the zygomatic arch medial surface of maxilla, but not the zygomatic arch inferior border of the zygomatic arch only

The masseter is innervated by the _____________ branch of the trigeminal nerve. maxillary mandibular ophthalmic lingual

The origin of the rectus femoris is the ____________. anterior inferior iliac spine greater trochanter linea aspera anterior femur

The rectus femoris muscle extends the leg at the __________. elbow knee ankle hip

The trapezius muscle may be separated into all of the following groups, except __________. inferior lateral middle superior

All fibers of the trapezius muscle are innervated by the __________. axillary nerve spinal accessory nerve coxal nerve scapular nerve

All fibers of the triceps brachii are innervated by the __________. humeral nerve ulnar nerve axillary nerve radial nerve

Which of the following is a hamstring muscle? biceps femoris rectus femoris vastus lateralis vastus medialis

All fibers of the pectoralis major muscle converge on the lateral edge of the__________. radial tuberosity greater tuberosity intertubercular sulcus deltoid tuberosity

The anterior axial muscle that crosses the glenohumeral joint is the pectoralis major muscle. True False

The posterior axial muscle that crosses the glenohumeral joint is the __________. brachioradialis latissimus dorsi pectoralis major trapezius