Correct Answer: B

Rationale: The correct answer is B: shadow or diminished vision in one quadrant or one half of the visual field. Retinal detachment can cause a shadow or reduced vision specifically in one quadrant or one half of the visual field due to the detachment of the sensory retina from the underlying retinal pigment epithelium. This occurs because the detached retina disrupts the normal function of the photoreceptor cells leading to visual disturbances in that specific area. A: Loss of central vision is not a typical sign of retinal detachment, as it usually affects peripheral vision initially. C: Loss of peripheral vision can occur in retinal detachment, but it is not a defining characteristic as the detachment typically affects a specific quadrant or half of the visual field. D: Sudden loss of pupillary constriction and accommodation is not directly related to retinal detachment but may be seen in other eye conditions like acute angle-closure glaucoma.

Correct Answer: C

Rationale: The correct answer is C: A thin, translucent membrane. In elderly patients, the tympanic membrane tends to become thinner and more translucent due to age-related changes. This is considered a normal finding as it is a common occurrence in older individuals. The other choices are incorrect because: A) Loss of high-tone frequency hearing is not a normal finding in an ear examination of an elderly patient, as age-related hearing loss typically affects high frequencies. B) Increased elasticity of the pinna is not a common age-related change and may indicate a different issue. D) A shiny pink tympanic membrane is not a typical finding in an elderly patient and could suggest inflammation or infection instead of a normal age-related change.

Correct Answer: B

Rationale: Step 1: Jaundice is characterized by a yellow skin color due to elevated bilirubin levels. Step 2: Yellow color extending up to the iris indicates systemic jaundice, involving the whole body. Step 3: Yellow patches throughout the sclera (Choice A) may not indicate systemic jaundice. Step 4: Skin appearing yellow under low light (Choice C) may not be specific to jaundice. Step 5: Yellow deposits on palms and soles (Choice D) are not typical signs of jaundice. Therefore, Choice B is correct as it reflects systemic jaundice, while the other choices do not fully align with the manifestation of true jaundice.

Correct Answer: C

Rationale: Rationale: 1. The middle ear conducts sound vibrations from the outer ear to the inner ear via the ossicles. 2. This transmission is essential for the inner ear to convert the vibrations into electrical signals for the brain to interpret as sound. 3. Maintaining balance (A) is the function of the inner ear's vestibular system. 4. Interpreting sounds (B) is done by the brain, not the middle ear. 5. Increasing amplitude (D) would distort sound perception, not enable inner ear function.

Correct Answer: A

Rationale: The correct answer is A: Over the sternum. When testing for skin mobility and turgor in infants, the sternum is the best location. This area is less affected by factors like fat distribution and muscle tone, providing a more accurate assessment of dehydration. The skin should be gently pinched and released to observe how quickly it returns to its normal position - delayed return indicates dehydration. The other choices are incorrect because testing over the forehead, forearms, or abdomen may not provide an accurate assessment due to variations in fat distribution, muscle tone, or skin elasticity in those areas.