During the assessment of an infant, the nurse notes that the fontanelles are depressed and sunken. Which condition does the nurse suspect?

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Question 1 of 5

During the assessment of an infant, the nurse notes that the fontanelles are depressed and sunken. Which condition does the nurse suspect?

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.

Question 2 of 5

During an examination, the nurse finds that a patient's left temporal artery is more tortuous and feels hardened and tender compared with the right temporal artery. What condition does the nurse suspect?

Correct Answer: C

Rationale: The correct answer is C: Temporal arteritis. Temporal arteritis is characterized by inflammation of the temporal arteries, leading to symptoms such as tenderness, hardness, and tortuosity. The left temporal artery being more affected than the right is a common presentation. Crepitation (choice A) refers to a crackling sound or sensation, typically associated with bone or joint abnormalities, not arterial inflammation. Mastoiditis (choice B) is an infection of the mastoid bone behind the ear, not related to temporal arteries. Bell's palsy (choice D) is a condition affecting facial nerves, not arteries.

Question 3 of 5

When examining a patient's eyes, the nurse knows that stimulation of the sympathetic branch of the autonomic nervous system:

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.

Question 4 of 5

A patient has a normal pupillary light reflex. The nurse recognizes this to indicate that:

Correct Answer: D

Rationale: The correct answer is D because a normal pupillary light reflex involves the constriction of both pupils in response to bright light. This reflex is controlled by the autonomic nervous system, specifically the parasympathetic nervous system. When light is detected by the retina, signals are sent to the brain which then triggers the constriction of both pupils to reduce the amount of light entering the eye. Choices A, B, and C are incorrect because they do not accurately describe the pupillary light reflex. Vision convergence, light reflection, and focusing the image at the center of the pupil are not directly related to the pupillary light reflex.

Question 5 of 5

A 52-year-old patient complains of seeing occasional"floaters or spots" in front of his eyes. The nurse should:

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.

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