The rhomboid major and minor muscles are deep to the

Correct Answer: C

Rationale: Rhomboid major and minor, between the scapulae, retract and stabilize the shoulder blades, lying deep to the trapezius, a superficial back muscle covering them. Rectus abdominis is anterior, unrelated. Scalenes are neck muscles, not over rhomboids. Ligamentum nuchae , a neck ligament, isn't superficial to rhomboids. Trapezius's broad, upper-back coverage over rhomboids, per anatomical layering, makes 'c' correct.

Correct Answer: B

Rationale: True ribs, 1st to 7th, attach directly to the sternum via their own costal cartilages, forming a stable thoracic cage for organ protection and respiration. Ribs 1-12 include false (8-10) and floating (11-12) ribs. Ribs 8-12 encompass false ribs (8-10, attached indirectly via shared cartilage) and floating (11-12, no sternal connection). Ribs 11-12 are floating only. The 1-7 direct articulation, per thoracic anatomy, defines true ribs, making 'b' correct.

Correct Answer: B

Rationale: The conjunctiva is a thin, transparent mucous membrane lining the inner eyelids and anterior eyeball, except the cornea. It secretes mucus and tears, lubricating the eye and protecting against debris and pathogens. Its transparency allows visibility of underlying vessels, and its immune cells surveil for infections like conjunctivitis. The sclera, the eye's white outer layer, is opaque and tough, supporting structure but not covering the eyelids or anterior surface flexibly. The choroid, a vascular layer between sclera and retina, nourishes the retina but lies deeper, not on the surface. The glabella, a forehead region above the nose, is unrelated to ocular anatomy. The conjunctiva's role extends beyond protection its goblet cells produce mucin, and its continuity with eyelid skin ensures a sealed barrier. Histological sections reveal its stratified epithelium, distinct from the sclera's collagen or choroid's vasculature. Ophthalmic literature underscores its protective and lubricating functions, critical for eye health, distinguishing it from other eye components.

Correct Answer: B

Rationale: Simple cuboidal epithelium, a single layer of cube-shaped cells, mainly functions in secretion and absorption, as in kidney tubules (reabsorbing water) or salivary glands (secreting saliva). Protection is more stratified squamous's role (e.g., skin). Diffusion suits simple squamous (e.g., alveoli), not cuboidal's thicker structure. Filtration occurs in kidneys, but cuboidal cells' active transport/secretion is primary. Its glandular and tubular roles, per epithelial classification, make 'b' correct.

Correct Answer: B

Rationale: Sebaceous glands produce sebum, an oil lubricating skin and hair, secreted via hair follicles in the dermis. Sweat glands produce sweat for cooling. Ceruminous glands make earwax, not skin oil. Mammary glands secrete milk. Sebaceous glands' oily output, preventing dryness, per integumentary function, makes 'b' correct.