Cs 2 HW 9.6

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Cs 2 HW 9.6 - Quiz

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Questions and Answers
  • 1. 

    (insertion)Humerus, intertubercular groove

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    A. Pectoralis major
    Explanation
    The correct answer is Pectoralis major because it is the only muscle listed that is directly associated with the humerus and the intertubercular groove. The other muscles listed are not connected to the humerus or the intertubercular groove.

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  • 2. 

    (insertion)Scapula, medial border

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    D. Serratus anterior
    Explanation
    The serratus anterior is a muscle located along the medial border of the scapula. It is responsible for protracting and stabilizing the scapula, allowing for movements such as reaching forward and pushing. The other options listed, pectoralis major, pectoralis minor, and subclavius, are muscles that are not specifically located along the medial border of the scapula. Therefore, the correct answer is serratus anterior.

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  • 3. 

    (insertion)Scapula, coracoid process

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    B. Pectoralis minor
    Explanation
    The correct answer is Pectoralis minor because the scapula has a bony process called the coracoid process, to which the Pectoralis minor muscle attaches. The other muscles listed, such as Pectoralis major, Subclavius, and Serratus anterior, do not attach to the coracoid process.

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  • 4. 

    (action)Rotates, protracts & stabilizes scapula

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    D. Serratus anterior
    Explanation
    The serratus anterior muscle is responsible for rotating, protracting, and stabilizing the scapula. It attaches to the medial border of the scapula and the lateral surface of the ribs. When it contracts, it pulls the scapula forward and around the rib cage, allowing for movements such as reaching forward or raising the arm overhead. The pectoralis major and minor muscles are primarily involved in movements of the shoulder joint, while the subclavius muscle helps to stabilize the clavicle.

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  • 5. 

    (action)Fixes clavicle, depresses shoulder

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    C. Subclavius
    Explanation
    The subclavius muscle is responsible for fixing the clavicle and depressing the shoulder. It is located beneath the clavicle and helps stabilize the joint. This muscle works in conjunction with other muscles like the pectoralis major, pectoralis minor, and serratus anterior to facilitate movement and stability in the shoulder and upper body.

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  • 6. 

    (action)Adducts, medially rotates & flexes upper armDraws upper arm across thorax

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    A. Pectoralis major
    Explanation
    The pectoralis major is responsible for the action of adducting, medially rotating, and flexing the upper arm. It also helps in drawing the upper arm across the thorax.

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  • 7. 

    (action)Depresses, protracts & downwardly rotates scapula

    • A.

      Pectoralis major

    • B.

      Pectoralis minor

    • C.

      Subclavius

    • D.

      Serratus anterior

    Correct Answer
    B. Pectoralis minor
    Explanation
    The pectoralis minor muscle is responsible for depressing, protracting, and downwardly rotating the scapula. This means that when the pectoralis minor contracts, it pulls the scapula downwards, forwards, and rotates it downwards. This action is important for movements like reaching forward and downward, as well as stabilizing the scapula during certain upper body exercises.

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  • 8. 

    (origin)Clavicle, anterior and lateral thirdScapula, acromion & spine

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    A. Deltoid
    Explanation
    The deltoid is a muscle located in the shoulder region. It is responsible for the abduction of the arm, meaning it helps to lift the arm away from the body. The other muscles listed are also located in the shoulder region but have different functions. The subscapularis is responsible for internal rotation of the arm, the supraspinatus assists in abduction of the arm, the infraspinatus is responsible for external rotation of the arm, and the teres major and teres minor assist in adduction and external rotation of the arm respectively. Therefore, the correct answer is the deltoid.

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  • 9. 

    (origin)Scapula, infraspinatous fossa

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    D. Infraspinatus
    Explanation
    The correct answer is Infraspinatus. The infraspinatus is a muscle located in the infraspinatous fossa of the scapula. It is one of the four muscles that make up the rotator cuff in the shoulder. The infraspinatus muscle is responsible for external rotation of the shoulder joint and is important for stabilizing and controlling movement in the shoulder.

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  • 10. 

    (origin)Scapula, lateral border

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infaspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    F. Teres minor
    Explanation
    The given list consists of muscles that are associated with the scapula, which is a bone in the shoulder region. The teres minor is one of the muscles that is located on the lateral border of the scapula. It is a small muscle that assists in the rotation of the arm and is part of the rotator cuff muscles. Therefore, the correct answer is teres minor.

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  • 11. 

    (origin)Scapula, supraspinatous fossa

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    C. Supraspinatus
    Explanation
    The supraspinatus is a muscle located in the supraspinatous fossa of the scapula. It is one of the muscles that make up the rotator cuff in the shoulder. Its main function is to assist in the abduction of the arm, helping to lift the arm away from the body. Therefore, the supraspinatus is the correct answer because it is the muscle that is specifically associated with the supraspinatous fossa of the scapula.

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  • 12. 

    (origin)Scapula, subscapular fossa

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    B. Subscapularis
    Explanation
    The subscapularis is the correct answer because it is the muscle that is located in the subscapular fossa of the scapula. The other muscles listed are also muscles of the shoulder, but they are not specifically associated with the subscapular fossa.

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  • 13. 

    (origin)Scapula, inferior angle

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    E. Teres major
    Explanation
    The teres major muscle is located in the posterior aspect of the scapula, specifically in the inferior angle region. It is one of the muscles that make up the rotator cuff and is responsible for adduction, extension, and medial rotation of the arm. The other muscles listed are also located around the scapula, but the teres major is the only one that is specifically located in the inferior angle region.

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  • 14. 

    (insertion)Humerus, intertubercular groove

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supaspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    D. Infraspinatus
    Explanation
    The given correct answer, "Infraspinatus," is a muscle located in the shoulder region. It is one of the muscles that make up the rotator cuff, which helps to stabilize and move the shoulder joint. The muscle originates from the infraspinous fossa of the scapula and inserts onto the greater tubercle of the humerus. It is responsible for the external rotation and extension of the shoulder joint.

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  • 15. 

    (insertion)Humerus, lesser tubercle

    • A.

      Deltoid

    • B.

      Subscapularis

    • C.

      Supraspinatus

    • D.

      Infraspinatus

    • E.

      Teres major

    • F.

      Teres minor

    Correct Answer
    B. Subscapularis
    Explanation
    The subscapularis muscle is the correct answer because it is the only muscle listed that attaches to the lesser tubercle of the humerus. The other muscles listed attach to different parts of the humerus or scapula.

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