A group of nursing students are studying the conduction system of the heart. The nursing students should recognize that the pacemaker of the heart is known as
The Correct Answer is {"dropdown-group-1":"C"}
The pacemaker of the heart is known as the sinoatrial (SA) node. The SA node is a specialized group of cells located in the right atrium of the heart. It generates electrical impulses that initiate each heartbeat and set the rhythm for the entire heart.
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Correct Answer is D
Explanation
A. The eyes converge to focus on the light.
This statement refers to the convergence reflex, where both eyes move medially (towards each other) to maintain single binocular vision when focusing on a near object. It is not related to the pupillary light reflex, which involves changes in pupil size in response to light.
B. The eye focuses the image in the center of the pupil.
This choice does not accurately describe the pupillary light reflex. The pupillary light reflex involves constriction of the pupil in response to light, not focusing an image in the center of the pupil.
C. Dilation of both pupils occurs in response to bright light.
This statement is incorrect. In response to bright light, the pupils should constrict, not dilate. Dilation of pupils in bright light could indicate an abnormal response, such as in cases of certain neurological conditions or drug use.
D. Constriction of both pupils occurs in response to bright light.
This choice is correct. In the pupillary light reflex, both pupils constrict when exposed to bright light. This response is a protective mechanism to prevent excessive light from entering the eyes, ensuring optimal visual acuity.
Correct Answer is C
Explanation
A. Checks the instrument gauge to ensure the reading starts at zero:
This action is correct. Before taking a blood pressure reading, it's essential to ensure that the instrument's gauge starts at zero. This ensures accurate measurement as the reading reflects the pressure above zero.
B. Centers the cuff bladder over the client's brachial artery:
This action is correct. Proper placement of the blood pressure cuff over the brachial artery is crucial for accurate readings. Centering the cuff ensures that the artery is correctly compressed for measurement.
C. Places the client's arm above the level of the client's heart:
This action is incorrect. Placing the arm above heart level can result in a falsely low blood pressure reading. The arm should be at the same level as the heart to obtain an accurate measurement.
D. Wraps the blood pressure cuff around the client's arm using firm pressure:
This action is correct, but it's important to note that while the cuff should be snug, it should not be too tight or too loose. Wrapping the cuff with firm, even pressure ensures proper compression of the artery for an accurate measurement.
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