30. The function of angiotensin II is to ________. a. constrict arterioles and increase blood pressure b. decrease the production of aldosterone c. decrease arterial blood pressured. decrease water absorption. b. constrict arterioles and increase blood pressure. 31.
Angiotensin II of RAAS causes vasoconstriction which makes the arteries narrower, causing an increase in blood pressure. Angiotensin II also stimulates aldosterone release from the adrenal glands. Aldosterone causes kidney cells to increase sodium absorption from urine and through the process of osmoregulation water absorption increases too.
Mar 22, 2022 · Mechanism of action. Angiotensin converting enzyme is responsible for converting angiotensin I to angiotensin II which is responsible for vasoconstriction. In addition to being a powerful vasoconstrictor, Angiotensin II is also responsible for hypertrophy of vascular tissues and aldosterone secretion. role
a. more frequent action potentials b. less frequent action potentials. less frequent action potentials. When blood pressure increases, blood vessels supplying the kidney will _____ to mount a steady rate of filtration. a. contract b. relax. ... d. angiotensin II. angiotensin II.
When blood vessels dilate, the flow of blood is increased due to a decrease in vascular resistance. Therefore, dilation of arterial blood vessels ( mainly the arterioles ) causes a decrease in blood pressure.
When blood pressure rises too high, baroreceptors fire at a higher rate and trigger parasympathetic stimulation of the heart. As a result, cardiac output falls. Sympathetic stimulation of the peripheral arterioles will also decrease, resulting in vasodilation. Combined, these activities cause blood pressure to fall.
Vasoconstriction is the narrowing of blood vessels resulting from contraction of the muscular wall of the vessels, particularly the large arteries and small arterioles. Generalized vasoconstriction usually results in an increase in systemic blood pressure, but may also occur in specific tissues, causing a localized reduction in blood flow.
Vasodilation is the widening of blood vessels resulting from relaxation of smooth muscle cells within the vessel walls, particularly in the large veins, large arteries, and smaller arterioles. Generalized vasodilation usually results in a decrease in systemic blood pressure, but may also occur in specific tissues causing a localized increase in blood flow.
When blood volume is low, renin, excreted by the kidneys, stimulates production of angiotensin I, which is converted into angiotensin II. This substance has many effects, including increase in blood pressure due to its vasoconstrictive properties.
Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood. This increases the volume of fluid in the body, which also increases blood pressure. If the renin-angiotensin-aldosterone system is too active, blood pressure will be too high.
Arterial pressure is most commonly measured via a sphygmomanometer, which historically used the height of a column of mercury to reflect the circulating pressure. Blood pressure values are generally reported in millimeters of mercury (mmHg), though aneroid and electronic devices do not use mercury.
ANGIOTENSIN CONVERTING ENZYME INHIBITORS (ACEIs) ACEIs are widely used to treat hypertension because they are effective, have relatively few side effects and in reduce the complications of hypertension such as heart attacks and strokes .
ACEIs are widely used to treat hypertension because they are effective, have relatively few side effects and in reduce the complications of hypertension such as heart attacks and strokes. They have a special use in patients with diabetes mellitus who have protein the urine (“diabetic nephropathy”) and in patients with chronic kidney disease (CKD) in whom they appeared to have beneficial actions in slowing the loss of kidney function above that achieved by other agents.
Diuretics. There are three classes of diuretic drugs that are used to treat hypertension. Most commonly used are thiazide diuretics such as hydrochlorothiazide or chlorthalidone. There is not usually an increased urine flow after the first one or two days of taking these medications. Nevertheless, it is best to take them in ...
They are effective in lowering blood pressure in the great majority of patients, especially those over 60, African Americans, and those with diabetes. Diuretics increase the effectiveness of all other categories of antihypertensives. That is why they are an essential part of almost any multidrug regimen for hypertension.
Diuretics increase the effectiveness of all other categories of antihypertensives. That is why they are an essential part of almost any multidrug regimen for hypertension. Special Points: Diuretics are the original antihypertensives. Therefore, their efficacy and adverse effects are very well understood.
For this reason, the Joint National Commission on Hypertension Detection Evaluation and Treatment (JNCVII) recommended thiazide diuretics as first line therapy for patients with hypertension, unless there were special reasons to select another type of drug.
Loop diuretics are not as effective as thiazides in lowering blood pressure in patients with hypertension. They are used especially to treat edema (swelling of the ankles) or heart failure. However, unlike thiazides, they effective in patients with poor kidney function in lowering blood pressure or treating edema.