Question

HUMAN ANATOMY UNIT ONE STUDY G 22. Movement away from the 23. Movement toward the 24. Movement 25. Movement Antial Language and Basics 10. Which of the following muscles does NOT strengthen the shoulder joint a) Tens Minor d) subscapularis b) Supraspinatus c) pectoralis minor c.) infraspinatus 11. An example of a diarthrotic synchondrosis is a) the epiphyseal plates d) the knee joint b) the joint between the sternum and the fourth c ) none of these, for such a joint does not exist nb c) any intertarsal joint PY 12. A pivot joint is (mark all that may apply): a.) an egg shaped surface that fits into an oval pocket b.) exemplified by the proximal radioulnar joint where the head of the radius is secured to the ulna c.) a rounded and fitted into a ridge of another bone anchored by ligaments d.) occurs between carpal bones or Larsal bones. 13. Or the various types of skeletal muscle fibers, the ones with the most glycogen granules, produces the most power, and has the least amount of mitochondria arc: a) red slow.twitch b) white fast-twitch c) intermediate fast-twitch d) red fast-twitch 14. A common characteristic of the three types of muscle tissue is that bea t 22 a) they all have striations b) contraction is triggered by the release of calcium an d c) they all contain sarcomeres d) they all have intercalated discs. obid 15. The only muscle cells that branch are muscle cells. a) skeletal b) smooth c) cardiac odved) red mail and son om Part II- True and False og spildot 16. In skeletal muscle cach muscle fiber is individually innervated by one neuron, but a single neuron can innervate many different muscle fibers. 17. The sarcoplasmic reticulum stores calcium. Talou s ) luglio 18. In the sarcomere, the A-band length NEVER changes. 19. In the sarcomere, the H-band is the entire length of the thick filament and it shortens and narrows during contraction 20. In the sarcomere, the I band straddles 2 sarcomeres, consists only of thin filaments, and will shorten and disappear during contraction. 21. Most joints of the body fall under the fibrous classification noodil o n lo month A. eversion B. opposition C . abduction D. extension AB, adduction AC. flexion AD. retraction E protraction d 18

Answer 1

Ans 10 - The shoulder joint is also known as the glenohumeral joint. The rotator cuff is a group of four muscles that surround and strengthen the shoulder joint .
Ans 10 The shoulder joint is the main joint of the shoulder. It is a ball and socket joint that allows the arms to rotate in a circular fashion or to hinge out and up away from the body. The ball of the joint is the rounded, medial anterior surface of the humerus and the socket is formed by the glenoid carity, the dish-shaped portion of the lateral scapula. The joint capsule is a soft tissue enelope that encircles the glenohumeral joint and attaches to the scapula, Phumerus, and head of the biceps The rotator cuff is a group of four muscles that swaround the shoulder joint and contribute to the shoulder's stability. The muscles of the rotator cuff are supraspinatus subscapularis, infraspinatus, and teres minor The cuf adheres to the glenohumeral capsule and attaches

groove. to the humeral head. The infraspinatus and the teres minor, along with the anterior fibers of the deltoid muscle, are responsible for external rotation of the arm. The supraspinatus and subscapularis tendons join as a sheath that surrounds the biceps tendon at the entrance of the bicipital - Pectoralis minor arises from the third, fourth, and fifth ribs, near their cartilage and inserts into the medial border and upper surface of the coracoid process of the scapula. This muscle aids in respiration, medially Protates the scapula, protracts the Escapula, and also draws the scapula. So the pectoralis minor muscle does not strengthen the shoulder Ljoint option (e) pectoralis minor is the correct answer. inferiorly.

CORĄCOID PROCESS CLAVICLE BURSA SUPRASPINATUS $UBSCAPULARIS + TERES MINOR & HUMERUS BICEPS MUSCLE SCAPULA Diagram of shoulder anatomy, front view