ATI RN
Questions About the Muscular System Questions
Question 1 of 5
What is the primary function of hair?
Correct Answer: D
Rationale: Hair's primary functions include all listed: UV protection (scalp shielding), sensory reception (via nerve endings at follicles), and insulation (trapping air for warmth), varying by location (e.g., scalp vs. eyebrows). No single role overshadows others universally scalp hair insulates, eyelashes protect, all sense. This multifunctionality, per hair's evolutionary roles, makes 'd' the correct answer.
Question 2 of 5
Which curve of the spine is formed when a child begins to walk?
Correct Answer: C
Rationale: The lumbar curve, a secondary curvature, forms when a child walks, shifting weight to an upright posture, enhancing balance. Cervical forms earlier (head lifting). Thoracic and sacral are primary, fetal curves. Lumbar's development, per spinal ontogeny, makes 'c' correct.
Question 3 of 5
What is a herniated disc?
Correct Answer: B
Rationale: A herniated disc is a bulging or ruptured intervertebral disc, pressing on spinal nerves, causing pain (e.g., sciatica). It's not a fracture , osteoporosis (c, bone loss), or joint inflammation (d, arthritis). Disc protrusion's effect, per pathology, makes 'b' correct.
Question 4 of 5
Which of the following specialties might focus on studying all of the structures of the ankle and foot?
Correct Answer: C
Rationale: Regional anatomy studies all structures (bones, muscles, nerves, etc.) within a specific body area, like the ankle and foot, making it ideal for a comprehensive focus on that region's anatomy. Microscopic anatomy examines cells/tissues at a cellular level, not gross structures. Muscle anatomy is too narrow, focusing only on muscles, not all ankle/foot components. Systemic anatomy studies body systems (e.g., skeletal) across the whole body, not one region. Regional anatomy's localized, all-inclusive approach, per anatomical study methods, makes 'c' the correct specialty.
Question 5 of 5
C.J. is stuck in her car during a bitterly cold blizzard. Her body responds to the cold by
Correct Answer: C
Rationale: In cold, the body breaks down stored energy (e.g., glycogen, fat) via metabolism to generate heat (thermogenesis), maintaining core temperature. Blood to hands/feet decreases (vasoconstriction) to save heat. Lethargy isn't primary shivering is. Blood oxygen doesn't spike, it's steady. Energy breakdown, per thermoregulation, makes 'c' correct.