health assessment practice questions

Correct Answer: B

Rationale: The correct answer is B: Dehydration. Depressed and sunken fontanelles in an infant indicate dehydration due to decreased fluid volume. Dehydration causes a decrease in tissue turgor, leading to the fontanelles appearing sunken. Rickets (A) is a condition characterized by weak or soft bones due to vitamin D deficiency. Mental retardation (C) is a developmental disorder, not related to fontanelle appearance. Increased intracranial pressure (D) would cause bulging fontanelles, not depressed fontanelles. Therefore, the most likely condition in this case is dehydration.

Correct Answer: B

Rationale: The correct answer is B: Dehydration. Depressed and sunken fontanelles in an infant indicate dehydration due to decreased fluid volume. Dehydration causes a decrease in tissue turgor, leading to the fontanelles appearing sunken. Rickets (A) is a condition characterized by weak or soft bones due to vitamin D deficiency. Mental retardation (C) is a developmental disorder, not related to fontanelle appearance. Increased intracranial pressure (D) would cause bulging fontanelles, not depressed fontanelles. Therefore, the most likely condition in this case is dehydration.

Correct Answer: C

Rationale: The correct answer is C because stimulation of the sympathetic branch of the autonomic nervous system results in the elevation of the eyelid (ptosis) and dilation of the pupil (mydriasis). This is due to the action of the dilator pupillae muscle and the superior tarsal muscle. Pupillary constriction (choice A) is controlled by the parasympathetic branch via the sphincter pupillae muscle. Adjusting the eye for near vision (choice B) is controlled by the ciliary muscle, which is under parasympathetic control, not sympathetic. Contraction of the ciliary body (choice D) is also controlled by the parasympathetic system for accommodation of near vision, not the sympathetic system.

Correct Answer: C

Rationale: Rationale for Correct Answer (C): 1. Red glow in pupils indicates a normal reflection off the inner retina known as the red reflex. 2. The red reflex helps to visualize the internal structures of the eye, including the retina. 3. This finding is expected during an ophthalmoscopic examination. 4. No abnormality is suggested by the presence of a red glow in the pupils. Summary of Other Choices: A: Incorrect. Red glow does not indicate an opacity in the lens or cornea. B: Incorrect. Checking the light source is unnecessary as red glow is a normal finding. D: Incorrect. Referral is not needed as red reflex is a normal part of an ophthalmoscopic exam.

Correct Answer: D

Rationale: The correct answer is D because floaters are a common and typically benign phenomenon caused by condensed vitreous fibers in the eye. A nurse should educate the patient that floaters are usually not significant and do not require immediate intervention. Option A is incorrect because counting the number of floaters is unnecessary. Option B is incorrect because presuming glaucoma without proper assessment is inappropriate. Option C is incorrect because seeing occasional floaters is a common and normal occurrence in many individuals.