A nurse document that a client has a normal pupillary light reflex. The nurse should recognize that this reflex indicates which of the following?

The eye focuses the image in the center of the pupil

Constriction both pupils occurs in response to bright light

The eye focuses the light on the sclera

Dilation of both pupils occurs in response to bright light

Answer and Explanation

The Correct Answer is B

A) The eye focuses the image in the center of the pupil:
This option describes the accommodation reflex, not the pupillary light reflex. The accommodation reflex involves the focusing of the eye to bring an image to the center of the retina, but it does not relate to the constriction of the pupils in response to light. Therefore, it is not the correct answer for describing the pupillary light reflex.

B) Constriction of both pupils occurs in response to bright light:
This is the correct description of the pupillary light reflex. When light is shined into one eye, the normal response is for both pupils (direct and consensual response) to constrict. The pupillary light reflex tests the integrity of the optic nerve (cranial nerve II) and the oculomotor nerve (cranial nerve III), which control the constriction of the pupil in response to light. A normal pupillary light reflex is characterized by the constriction of both pupils when exposed to light.

C) The eye focuses the light on the sclera:
This statement is inaccurate. The sclera is the white part of the eye, and light is focused on the retina (specifically the fovea) for proper vision. This does not relate to the pupillary light reflex, which specifically refers to the constriction of the pupils in response to light.

D) Dilation of both pupils occurs in response to bright light:
This is incorrect. Dilation of the pupils occurs in low light conditions as part of the pupillary dilation reflex (also called the "dark reflex") to allow more light into the eye. However, in response to bright light, the pupils constrict, not dilate. The constriction of the pupils in bright light is the primary characteristic of a normal pupillary light reflex.

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Correct Answer is C

Explanation

A) Both lungs are equal in size with varying numbers of lobes:
This is incorrect. The right lung is slightly larger than the left lung, as the left lung is somewhat smaller to accommodate the heart. The right lung has three lobes, while the left lung has only two lobes.

B) The diaphragm rises in the chest during inspiration:
This is incorrect. During inspiration (inhalation), the diaphragm contracts and moves downward to allow the lungs to expand and fill with air. It rises during exhalation as it relaxes and pushes air out of the lungs.

C) The left lung has two lobes to make room for the heart:
This is correct. The left lung has two lobes (upper and lower) compared to the three lobes of the right lung. The left lung is slightly smaller due to the space the heart occupies on the left side of the chest, allowing for asymmetry between the two lungs.

D) The right lung has two lobes to make room for the liver:
This is incorrect. The right lung has three lobes, not two. The liver is located lower in the abdomen and does not influence the number of lobes in the right lung. The asymmetry of the lungs is due to the position of the heart on the left side of the chest.

A. Simultaneously palpating both arteries to compare amplitude B. Auscultating the artery at the base of the neck at the carotid bifurcation C. Listening with the diaphragm of the stethoscope to assess for bruits D. Instructing the client to take deep breaths during auscultation

Correct Answer is B

Explanation

A) Simultaneously palpating both arteries to compare amplitude: Palpating both carotid arteries simultaneously is contraindicated as it can obstruct blood flow to the brain, potentially causing a decrease in cerebral perfusion and leading to syncope or other complications. Each artery should be palpated one at a time to prevent this risk.

B) Auscultating the artery at the base of the neck at the carotid bifurcation: The correct technique for assessing for carotid artery blockage is to auscultate the artery at the carotid bifurcation, which is located at the base of the neck. The nurse should use the bell of the stethoscope to listen for bruits, which are abnormal sounds caused by turbulent blood flow due to narrowing or blockage of the artery. This is a non-invasive method used to detect vascular abnormalities.

C) Listening with the diaphragm of the stethoscope to assess for bruits: The diaphragm of the stethoscope is generally used for high-pitched sounds like lung and bowel sounds. For auscultating bruits, the bell of the stethoscope is preferred because it is more sensitive to low-pitched sounds, which are characteristic of bruits caused by turbulent blood flow in narrowed arteries.

D) Instructing the client to take deep breaths during auscultation: Instructing the client to take deep breaths is unnecessary and could alter the sound being auscultated. The nurse should have the client breathe normally to avoid interference with the auscultation of the carotid arteries. The goal is to listen for any abnormal sounds (bruits) without any external factors affecting the findings.

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