QuestionSBA
QuestionChoice
This is incorrect. Excretion of sodium from the kidney would in turn increase water excretion, which follows sodium via osmosis. This would therefore reduce the circulating blood volume and consequently reduce the stroke volume of the heart. This would reduce mean arterial blood pressure.
10025922
c
Increasing renal excretion of sodium
QuestionChoice
This is correct. Activation of the sympathetic nervous system increases heart rate and increases peripheral vascular resistance. Mean arterial pressure is determined by the cardiac output multiplied by total peripheral resistance. Cardiac output is determined by the heart rate and stroke volume. Therefore by increasing heart rate, the cardiac output and consequently the mean arterial pressure also increase. The increase in peripheral vascular resistance further contributes to an increase in mean arterial pressure.
10025920
a
Sympathetic nervous system activation
QuestionChoice
This is incorrect. An increase in body temperature would cause vasodilation, thus reducing peripheral vascular resistance. This in turn reduces mean arterial blood pressure.
10025923
d
Increase in body temperature
QuestionChoice
This is incorrect. Histamine causes vasodilation, thus reducing peripheral vascular resistance. This in turn reduces mean arterial blood pressure.
10025924
e
Histamine release
QuestionChoice
This is incorrect. The parasympathetic system decreases heart rate. This reduces cardiac output, consequently reducing mean arterial pressure. Activation of the parasympathetic nervous thus causes a decrease in blood pressure.
10025921
b
Parasympathetic nervous system activation
Concept
Chapter
2693
3701
Hypertension
Topic
134
Cardiology
17582
A 58 year old male attends his GP surgery after noticing his blood pressure was high on his husband's home blood pressure monitor. He would like to know more about hypertension and its causes.

Which of the following is associated with an increase in blood pressure?
a