ATI RN
Multiple Choice Questions Muscular System Questions
Question 1 of 5
What are the muscles known as gluteus maximus, gluteus medius and gluteus minimus named according to? Their:
Correct Answer: A
Rationale: Gluteus maximus, medius, and minimus are named for size largest, middle, smallest among buttock muscles. Shape (e.g., trapezius), whimsy (e.g., sartorius), or fibre direction (e.g., rectus) aren't indicated. Size-based naming distinguishes them, reflecting relative mass critical for hip function and anatomical clarity.
Question 2 of 5
Which of the following statements is correct about what happens during flexion?
Correct Answer: B
Rationale: Flexion decreases the angle between bones, as when bending the elbow (humerus and radius/ulna angle shrinks), a fundamental joint movement in kinesiology. Increasing the angle describes extension, not flexion. Moving away from the body aligns with abduction, not flexion, which typically occurs in a sagittal plane. Moving toward the body's center might suggest adduction, but flexion is about angle reduction, not midline proximity (e.g., knee flexion doesn't necessarily approach the midline). The angle decrease precisely defines flexion's action, making it correct.
Question 3 of 5
Where is the inferior oblique muscle located?
Correct Answer: B
Rationale: The inferior oblique, one of six extraocular muscles, is in the eye socket (orbit), originating near the nasal bone and inserting on the eyeball's posterior, elevating and abducting the eye. The abdomen has obliques (external/internal) for trunk movement, not eyes. The anterior neck includes muscles like SCM, not ocular. The face has expression muscles, not eye movers. Its orbital location, controlling gaze, distinguishes it, making 'b' correct.
Question 4 of 5
The large muscle group that attaches the leg to the pelvic girdle and produces extension of the hip joint is the group.
Correct Answer: A
Rationale: The gluteal group (gluteus maximus, medius, minimus) attaches the femur to the pelvic girdle, with gluteus maximus primarily extending the hip (e.g., standing from sitting). Obturator muscles rotate the thigh, not extend. Adductors pull the leg inward. Abductors move it outward (e.g., gluteus medius), not extend. Gluteals' size and hip extension role, per lower limb mechanics, make 'a' the correct group.
Question 5 of 5
The temporalis muscle, which helps close the jaw, attaches to the which part of the mandible?
Correct Answer: C
Rationale: The temporalis muscle, originating from the temporal fossa, inserts on the mandible's coronoid process, a sharp, anterior projection, elevating the jaw for chewing. 'Turbulance' is a typo or nonsense term, not anatomical. Mandibular condyles articulate with the skull at the TMJ, not the temporalis insertion. Conchae , nasal structures, are unrelated to the mandible. The coronoid process's role as the temporalis's anchor, enhancing bite force, makes 'c' the correct attachment point.