Which of the following blood pressure readings would be indicative of hypertension?
120/80
110/60
170/96
140/90
The Correct Answer is C
A. 120/80: This reading falls within the normal blood pressure range. Systolic pressure is at the upper end of normal, and diastolic pressure is well within normal limits, so it does not indicate hypertension.
B. 110/60: This is considered a low-normal blood pressure reading. Both systolic and diastolic pressures are below the thresholds for hypertension, indicating normal or slightly low blood pressure.
C. 170/96: This reading is significantly elevated, with both systolic and diastolic pressures above normal limits. A systolic pressure ≥140 mmHg or a diastolic pressure ≥90 mmHg meets the criteria for hypertension, making this reading indicative of the condition.
D. 140/90: While this reading meets the minimum threshold for stage 2 hypertension, it is less severe than 170/96. It does indicate hypertension but is less markedly elevated compared with option C.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Lymph nodes:Lymph nodes filter lymph and provide immune surveillance, but they do not directly absorb or transport dietary fats from the small intestine to the bloodstream.
B. Tonsils:Tonsils are lymphoid tissues located in the pharynx that trap pathogens entering through the mouth or nose. They play no role in fat absorption or transport.
C. Peyer’s patches:Peyer’s patches are lymphoid follicles in the small intestine that monitor intestinal bacteria and facilitate immune responses. They are not involved in the absorption of dietary fats.
D. Lacteals:Lacteals are specialized lymphatic capillaries located in the villi of the small intestine. They absorb dietary fats in the form of chylomicrons and transport them via lymph to the bloodstream, bypassing the hepatic portal system.
Correct Answer is A
Explanation
A. Both B and E:Chemoreceptors monitor chemical changes in the blood, such as CO₂ levels and pH (H⁺ concentration), and baroreceptors monitor blood pressure changes. Some chemoreceptors work alongside baroreceptors to regulate respiration and cardiovascular function, making both B and E correct in the context of chemical detection.
B. The amount of CO₂ and H⁺ in the blood:Chemoreceptors detect changes in CO₂ and hydrogen ion concentration, which reflect the blood’s acidity. These receptors help adjust respiration rate to maintain homeostasis of blood pH and gas levels.
C. Heart rate:Heart rate is regulated primarily by the autonomic nervous system via the sinoatrial node and baroreceptor reflexes, not directly by chemoreceptors.
D. The blood pressure change:Blood pressure changes are detected by baroreceptors, not chemoreceptors. Chemoreceptors respond mainly to chemical composition rather than mechanical pressure.
E. A pH change:Chemoreceptors are sensitive to pH changes in the blood, which are influenced by CO₂ and H⁺ levels. This detection triggers adjustments in ventilation to maintain acid-base balance.
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