Which factors may contribute to hypertension? (Select All that Apply.)
Decreased stimulation of the sympathetic nervous system (SNS).
Decreased elasticity of blood vessels.
Increased peripheral vascular resistance (PVR).
Decreased fluid volume.
Increased blood viscosity.
Correct Answer : B,C,E
(A) Decreased stimulation of the sympathetic nervous system (SNS): The sympathetic nervous system (SNS) plays a key role in regulating blood pressure. When the SNS is stimulated, it causes vasoconstriction, or narrowing of the blood vessels, which increases blood pressure. Therefore, decreased stimulation of the SNS would typically lead to vasodilation, or widening of the blood vessels, which would lower blood pressure, not increase it.
(B) Decreased elasticity of blood vessels: As people age, their blood vessels can lose elasticity, which can lead to hypertension. When blood vessels are elastic, they can easily expand and contract with each heartbeat, maintaining a healthy blood pressure. But when they become stiff or rigid, they can’t expand as easily, causing the pressure inside to increase.
(c) Increased peripheral vascular resistance (PVR): Peripheral vascular resistance is the resistance that blood must overcome to flow through the blood vessels. The more resistance, the harder the heart has to work to pump blood through the body, which can lead to increased blood pressure. Factors that can increase PVR include vasoconstriction, or narrowing of the blood vessels, and increased blood viscosity, or thickness.
(D) Decreased fluid volume: Decreased fluid volume, or hypovolemia, would typically lead to a decrease in blood pressure, not an increase. This is because blood pressure is directly related to the volume of blood in the blood vessels. When there’s less blood, the pressure inside the blood vessels is usually lower.
(E) Increased blood viscosity: Blood viscosity refers to the thickness of the blood. When blood is thicker, it’s harder for it to flow through the blood vessels, which increases the resistance to blood flow, leading to increased blood pressure.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Cerebral edema:
Cerebral edema is not typically associated with hyperkalemia. It is more commonly seen in conditions such as hyponatremia or cerebral trauma.
B. Hypoactive bowel sounds:
Hypoactive bowel sounds are not typically associated with hyperkalemia. They may occur in conditions such as paralytic ileus or intestinal obstruction.
C. Decreased deep tendon reflexes:
Decreased deep tendon reflexes (hyporeflexia) are a common manifestation of hyperkalemia. High potassium levels can impair neuromuscular function, leading to decreased reflexes.
D. Wheezing:
Wheezing is not typically associated with hyperkalemia. It may occur in conditions such as asthma or chronic obstructive pulmonary disease (COPD).
Correct Answer is C
Explanation
A. Restlessness:
Restlessness is not typically associated with hypokalemia. Instead, it may indicate anxiety, discomfort, or other factors unrelated to electrolyte imbalances.
B. Hyperactive bowel sounds:
Hyperactive bowel sounds are often associated with increased gastrointestinal motility, which may occur in conditions such as diarrhea or gastroenteritis. While electrolyte imbalances can contribute to gastrointestinal symptoms, hyperactive bowel sounds are not specific to hypokalemia.
C. Decreased deep-tendon reflexes:
Hypokalemia can lead to decreased deep-tendon reflexes due to its effects on nerve conduction. Potassium is essential for proper nerve and muscle function, and low levels can impair reflexes.
D. Bounding peripheral pulses:
Bounding peripheral pulses are not typically associated with hypokalemia. Instead, they may indicate increased cardiac output or volume overload, which can occur in conditions such as heart failure.
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