Which mechanism increases peripheral vascular resistance and contributes to the development of hypertension?
None of these
Impaired sodium excretion by the kidneys
Parasympathetic system overstimulation
Reduced renin-angiotensin-aldosterone secretion
The Correct Answer is B
A. This option is incorrect because impaired sodium excretion by the kidneys does contribute to increased peripheral vascular resistance and hypertension.
B. Impaired sodium excretion by the kidneys can lead to fluid retention, which increases blood volume. This results in increased peripheral vascular resistance, a key factor in the development of hypertension.
C. Overstimulation of the parasympathetic nervous system typically causes a reduction in heart rate and vasodilation, which would generally lower blood pressure, not contribute to hypertension.
D. The renin-angiotensin-aldosterone system plays a crucial role in regulating blood pressure. Reduced secretion of renin, angiotensin, and aldosterone would not contribute to increased peripheral vascular resistance. In fact, these systems typically work to raise blood pressure when needed.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Consolidation refers to the accumulation of inflammatory products, such as exudate, in the alveoli of the lungs, which is a hallmark finding in pneumonia. It appears as a dense, solid area on chest X-ray and indicates that the lung tissue has become filled with fluid, pus, and cellular debris.
B. Exudation is the process by which fluid and cells leak out of blood vessels into the surrounding tissues, which is part of the inflammatory response in pneumonia. However, consolidation is the specific diagnostic finding that results from exudation in pneumonia.
C. Pneumonia is the overall condition being described, but it is not the diagnostic finding itself. Consolidation is the key radiological and clinical finding in pneumonia.
D. Hemoptysis, or coughing up blood, can occur in some cases of pneumonia, but it is not a typical or defining diagnostic finding of pneumonia. It is more often associated with conditions like tuberculosis or lung cancer.
Correct Answer is D
Explanation
A. A superficial partial thickness burn affects only the outermost layer of skin (epidermis) and causes redness and pain, but it doesn't usually cause blisters.
B. A full-thickness burn involves the destruction of all layers of the skin, including the epidermis, dermis, and sometimes underlying tissue. This type of burn typically causes a white or charred appearance and may not be painful due to nerve damage.
C. Dermal thickness burn is not a standard classification of burn depth. Burns are typically classified into superficial, partial-thickness, and full-thickness categories.
D. A deep partial-thickness burn involves damage to both the epidermis and dermis, causing redness, swelling, and blistering. This is the most likely classification for a sunburn with redness and blistering.
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