Correct Answer: C

Rationale: The correct answer is C because the normal eardrum of a newborn can appear thick and opaque due to the presence of vernix or desquamated epithelium. Immobility of the drum (Choice A) is not a normal finding in a newborn and could indicate a problem. An "injected" membrane (Choice B) would suggest inflammation or infection, not necessarily infection. The appearance of the membrane in a newborn is not identical to that of an adult (Choice D) as it may have a different color, thickness, or opacity due to developmental differences.

Correct Answer: D

Rationale: The correct answer is D because it provides an accurate explanation for the frequent ear infections in the 2-year-old. The eustachian tube in children is indeed shorter and wider compared to adults, making it easier for infections to develop. This anatomical difference predisposes young children to ear infections. Choice A is incorrect because it falsely implies that frequent ear infections in small children are unusual only if something else is wrong. Choice B is incorrect as checking the immune system is not typically the first step in addressing recurrent ear infections. Choice C is incorrect as cerumen (earwax) does not directly contribute to ear infections in the middle ear.

Correct Answer: C

Rationale: The correct answer is C because purpura is characterized by the presence of confluent and extensive patches of petechiae and ecchymoses. Petechiae are small, pinpoint hemorrhages less than 2mm in size, and ecchymoses are larger bruises. This presentation is indicative of a more severe underlying condition, such as a bleeding disorder or vasculitis. Choice A is incorrect as it describes spider veins or telangiectasias, not purpura. Choice B describes a birthmark, not purpura. Choice D is incorrect as it describes petechiae, not purpura, which involves larger areas of bleeding.

Correct Answer: B

Rationale: The correct answer is B. When using an otoscope to assess the nasal cavity, it is crucial to avoid touching the nasal septum with the speculum to prevent discomfort or injury to the patient. Touching the nasal septum can cause pain and potential damage. Incorrect Choices: A: Inserting the speculum at least 3 cm into the vestibule is not necessary and may cause discomfort or injury to the patient. C: Displacing the nose to the side being examined is not required and may not provide any additional benefit during the assessment. D: Keeping the speculum tip medial to avoid touching the floor of the nares is not as critical as avoiding contact with the nasal septum, which is more sensitive and can be easily injured.

Correct Answer: C

Rationale: The correct answer is C because the trigeminal (CN V) and the trochlear (CN IV) nerves are indeed stimulated when the outer surface of the eye is stimulated. The trigeminal nerve is responsible for the sensation of touch in the face and controls the muscles involved in chewing. The trochlear nerve controls the superior oblique muscle of the eye, which helps with downward and inward eye movements. Therefore, when the outer layer of the eye is touched or stimulated, these nerves are activated to convey the sensation to the brain. Choices A, B, and D are incorrect: A: The outer layer of the eye is not particularly sensitive to touch compared to other areas like the cornea or conjunctiva. B: The outer layer of the eye is not darkly pigmented; the pigmented layer is actually the uvea inside the eye. D: The visual receptive layer of the eye, known as the retina, is located deeper within the eye, not