The stethoscope is placed over the _______ artery in the antecubital space when taking blood pressure.
brachial
axillary
radial
ulnar
The Correct Answer is A
A. Brachial: The brachial artery runs through the antecubital fossa of the elbow and is the standard site for auscultating Korotkoff sounds during blood pressure measurement. Its superficial location and direct alignment with the cuff make it ideal for accurate readings.
B. Axillary: The axillary artery is located in the armpit region and is not used for routine blood pressure measurement due to its deeper and less accessible position.
C. Radial: The radial artery at the wrist is commonly used to assess pulse, but it is not the standard site for measuring blood pressure with a cuff and stethoscope.
D. Ulnar: The ulnar artery is also located at the wrist and serves primarily to supply the hand. It is not used for standard blood pressure measurements due to its deeper position and smaller size.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. Anti-B antibodies in the donor will agglutinate RBCs of the recipient:Type AB blood does not have anti-A or anti-B antibodies in the plasma. Therefore, the donor’s plasma will not cause agglutination in the recipient.
B. Anti-A antibodies in the donor will agglutinate RBCs of the recipient:Similarly, type AB blood lacks anti-A antibodies, so this is not the cause of incompatibility.
C. Anti-A antibodies in the recipient will agglutinate RBCs of the donor:Type A, Rh-positive recipients produce anti-B antibodies. Anti-A antibodies are not involved in reacting to type AB donor cells, so this is incorrect.
D. Anti-D antibodies in the donor will agglutinate RBCs of the recipient:Rh-negative donors do not have anti-D antibodies in their plasma because they have not been sensitized. Therefore, anti-D from the donor is not the problem.
E. Anti-B antibodies in the recipient will agglutinate RBCs of the donor:Type A, Rh-positive recipients naturally have anti-B antibodies in their plasma. When they receive type AB blood, the donor RBCs carry B antigens, which react with the recipient’s anti-B antibodies, causing agglutination and making the transfusion incompatible.
Correct Answer is D
Explanation
A. Left atrium:The left atrium receives oxygenated blood from the pulmonary veins but does not contain pacemaker tissue. The SA node is not located here.
B. Right ventricle:The right ventricle pumps deoxygenated blood to the lungs and does not house the sinoatrial node.
C. Left ventricle:The left ventricle pumps oxygenated blood to the systemic circulation but does not contain the SA node.
D. Right atrium:The sinoatrial (SA) node is located in the posterior wall of the right atrium near the entrance of the superior vena cava. It serves as the natural pacemaker of the heart, initiating the electrical impulses that regulate heart rate.
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