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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Small for gestational age:
While being small for gestational age can contribute to respiratory difficulties in newborns, it is not directly associated with respiratory distress syndrome or respiratory acidosis. Other factors, such as prematurity or intrauterine growth restriction, may play a more significant role.
B. Cesarean birth:
Cesarean birth can predispose newborns to respiratory difficulties, including respiratory distress syndrome. During vaginal birth, the compression of the chest during passage through the birth canal helps expel lung fluid, whereas babies born via cesarean section may have more retained lung fluid, leading to respiratory distress.
C. Ventricular septal defect:
Ventricular septal defect is a congenital heart defect and is not directly associated with respiratory distress syndrome or respiratory acidosis. However, congenital heart defects can affect the cardiovascular system, leading to respiratory compromise in some cases.
D. Maternal history of asthma:
While maternal asthma can increase the risk of respiratory problems in newborns, it is not directly related to respiratory distress syndrome or respiratory acidosis. Maternal asthma may increase the likelihood of the newborn developing asthma or other respiratory conditions later in life.
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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