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 A
Explanation
A. Opsonization:Opsonization is the process by which antibodies and complement proteins coat a pathogen, enhancing recognition and binding by phagocytes. This coating increases the efficiency of phagocytosis and helps eliminate the microorganism.
B. Agglutination:Agglutination occurs when antibodies bind multiple antigens together, causing clumping of pathogens. While it helps contain infections, it does not directly facilitate phagocytosis in the same way opsonization does.
C. Chemotaxis:Chemotaxis refers to the directed movement of immune cells toward a site of infection or tissue damage, guided by chemical signals. It does not involve coating pathogens for phagocytosis.
D. Diapedesis:Diapedesis is the process by which leukocytes squeeze through capillary walls to reach infected tissues. It facilitates immune cell migration but is not the mechanism by which pathogens are marked for phagocytosis.
Correct Answer is A
Explanation
A. Antigens are substances that activate the adaptive immune response:Antigens are molecules, often proteins or polysaccharides, that are recognized as foreign by the immune system. Their presence triggers B and T lymphocytes to mount a specific adaptive immune response, including antibody production and cell-mediated immunity.
B. Antigens are typically composed of nucleotides:Antigens are usually composed of proteins, glycoproteins, or polysaccharides, not nucleotides. While nucleic acids can sometimes act as antigens, they are not the typical composition of antigenic substances.
C. Antigens are produced by the body in response to a foreign invader:Antigens themselves are foreign molecules or markers; they are not produced by the body. The body produces antibodies or immune cells that recognize and respond to antigens.
D. Antigens are limited to one antigenic determinant per antigen molecule:Many antigens have multiple antigenic determinants (epitopes), allowing them to be recognized by multiple antibodies or T cell receptors. They are not limited to a single determinant.
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