ATI RN
Questions About Muscular System with Answers Questions
Question 1 of 5
Where is the temporalis muscle located?
Correct Answer: C
Rationale: The temporalis muscle is on the side of the head, originating from the temporal bone's fossa and inserting on the mandible's coronoid process, aiding jaw closure. The forehead hosts frontalis, part of occipitofrontalis. The neck has muscles like sternocleidomastoid, not temporalis. The chin relates to mentalis, not temporalis. Its lateral cranial position, visible when clenching teeth, confirms 'c' as the correct location in head anatomy.
Question 2 of 5
In the region just deep to the eyebrows, are present which allow nerves and arteries to pass.
Correct Answer: C
Rationale: The supraorbital foramina (or notches), located just deep to the eyebrows on the frontal bone's supraorbital margin, allow the supraorbital nerve and artery to pass, supplying sensation and blood to the forehead. The nasal bridge is the bony junction of nasal bones, not a passage site. The frontal sinus , an air cavity above the eyes, doesn't transmit nerves or arteries. The maxillary sinus , below the eyes in the maxilla, is unrelated to this region. The supraorbital foramina's specific location and function in neurovascular passage make 'c' the correct answer.
Question 3 of 5
Which of the following ribs are known as true ribs?
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.
Question 4 of 5
A thin, transparent mucous membrane that covers the inner surface of the eyelids and the anterior surface of the eye is the?
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.
Question 5 of 5
What is the main function of simple cuboidal epithelium?
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.