The nurse is changing the position of a person with flaccid paralysis. The priority action will be:

Correct Answer: A

Rationale: Flaccid paralysis causes muscle limpness, increasing the risk of joint stiffness or deformity from prolonged immobility. Changing joint position is the priority to prevent contractures and maintain alignment, using careful support to avoid strain. Not using a footboard might prevent footdrop in some cases, but it's secondary to overall joint care. Moving only side to side limits flexibility and risks pressure sores, ignoring full-body needs. Avoiding pillows dismisses a tool for support, which isn't the issue positioning is. Adjusting joints takes precedence, as it directly addresses the paralysis-related risk of fixed postures, ensuring long-term mobility and comfort.

Correct Answer: C

Rationale: The pelvic floor is divided into two main regions: the anal triangle and the urogenital triangle. The description provided inferior to the pubic symphysis, bounded by the pubic symphysis and ischial tuberosities, and containing the external genitalia specifically refers to the urogenital triangle. This region is located anteriorly in the perineum and includes structures such as the urethra and external genitalia in both males and females. The term deep is a directional descriptor and does not define a specific region. Fixators refers to muscles that stabilize the origin of a prime mover, unrelated to pelvic floor anatomy. Superficial is another directional term and does not match the detailed anatomical boundaries provided. Thus, urogenital triangle is the correct answer, as it precisely corresponds to the anatomical area described in the question, distinguishing it from other regions like the anal triangle.

Correct Answer: A

Rationale: The rotator (musculotendinous) cuff is a group of four muscles subscapularis, supraspinatus, infraspinatus, and teres minor whose tendons encircle the shoulder joint, providing stability and enabling a wide range of motion. This cuff strengthens the glenohumeral joint, preventing dislocation during activities like throwing. Deep is a positional term, not a structure. Perineum is the pelvic floor region, unrelated to the shoulder. The diaphragm is the breathing muscle. The rotator cuff's specific role and composition match the question, making it the correct answer, as it's a critical anatomical feature in shoulder function and a common site of injury in sports or aging.

Correct Answer: C

Rationale: The rectus femoris has fascicles running parallel to the midline of the body, as part of the quadriceps group, extending the knee with fibers aligned longitudinally along the thigh. External obliques have diagonal fascicles, aiding trunk rotation. Transverse abdominis runs horizontally, compressing the abdomen. Biceps femoris has longitudinal but slightly angled fascicles in the posterior thigh, not strictly midline-parallel. Rectus femoris' straight, midline-aligned fascicles (rectus means straight ) make it the correct answer, reflecting its anatomical orientation and role in linear force production distinct from the angled or transverse patterns of other options.

Correct Answer: A

Rationale: The trapezius inserts on the clavicle and acromion process of the scapula, stabilizing and moving the shoulder girdle, such as in shrugging. Pectoralis major inserts on the humerus, not the clavicle or acromion. Latissimus dorsi inserts on the humerus too, affecting the arm. Gracilis is a thigh muscle, unrelated. Trapezius is the correct answer, as its insertion matches the question's sites, playing a key role in pectoral girdle motion and posture, distinct from arm-focused muscles.