Filtration of plasma is dependent on the Hydrostatic pressure of blood. In situations of Hypotension, this...

Filtration of plasma is dependent on the Hydrostatic pressure of blood. In situations of Hypotension, this is clearly compromised. To maintain (or raise) GFR, the kidney will:

Group of answer choices

A. Dilate Efferent Arteriole

B. Constrict Efferent and Afferent Arteriole

C. Dilate Afferent Arteriole

D. Constrict Afferent Arteriole

Solutions

Expert Solution

The kidneys regulate blood pressure by regulating renal blood flow. When there is decreased blood pressure (hypotension), the hydrostatic pressure decreases in the afferent arteriole. As a result, there is decreased stretch in the vascular smooth muscles lining the afferent arterioles. As a result, the inward direct ion channels will be inactivated, causing dilation of the smooth muscles. This will result in increased blood flow to the glomerulus. This will increase or maintain glomerular filtration rate as renal blood flow is increased.

The efferent arterioles are under the influence of RAAS system. The decrease in blood pressure activates the RAAS system, which then leads to production of angiotensin II and aldosterone. Angiotensin II will constrict the efferent arterioles. Hence, there is dilation of afferent arterioles and constriction of efferent arterioles.

Right choice: C. Dilate Afferent Arteriole

Sydney Mullin answered 11 months ago

Next > < Previous

Related Solutions

1. Hypotension will lower the plasma osmolarity, blood pressure, and blood volume. This will activate the...

1. Hypotension will lower the plasma osmolarity, blood pressure, and blood volume. This will activate the renin-angiotensin-aldosterone system. Overhydration will increase the blood volume. This will trigger the cardiac atrial cells to secrete atrial natriuretic peptide (ANP). Fasting will increase the plasma osmolarity, decrease blood pressure and blood volume. This will trigger the secretion of anti-diuretic hormone (ADH). a. True b. False 2. What is TRUE about acetylcholine? There may be more than one answer. a. Acetylcholine is a neurotransmitter...

How is hydrostatic pressure altered when blood pressure is low?

Hydrostatic Pressure.

Question: A submarine dives to a depth of 120 meters in the ocean. What is the force (in Newtons) acting on a hatch that has an area of 5.00 square meters?

1. Orthostatic hypotension is defined as the failure to maintain a fairly constant blood pressure during...

1. Orthostatic hypotension is defined as the failure to maintain a fairly constant blood pressure during posture changes. List all the functional locations within the cardiovascular system where a lack of function could lead to baroreceptor reflex dysfunction. 2.. Describe in detail an example where the nervous system affects the circulatory system. 3. Describe in detail an example where the nervous system affects the circulatory system.

Describe the regulation of filtration in the nephron (renal corpuscle) in response to blood pressure, nervous...

Describe the regulation of filtration in the nephron (renal corpuscle) in response to blood pressure, nervous input, hormones, and Tubuloglomerular Feedback. (Be sure to compare activity at the afferent and efferent arterioles.)

Describe the regulation of filtration in the nephron (renal corpuscle) in response to blood pressure, nervous...

For each of the following situations, describe the effect on blood pressure and the physiological basis...

For each of the following situations, describe the effect on blood pressure and the physiological basis of the response: A). Being attacked by a mugger B). Addison’s disease C). Diabetes insipidus

Glomerular Filtration What is the major force/pressure that causes filtration? What is the major force/pressure that...

Glomerular Filtration What is the major force/pressure that causes filtration? What is the major force/pressure that causes reabsorption? What would happen to the filtration rate if glomerular capillaries were damaged to an extent to be leaky to plasma proteins? Identifying how renal arterioles affect GFR Complete the following table that describes how changes in the diameters of these resistance vessels affect glomerular hydrostatic pressure and GFR (assuming no change in renal arterial pressure) with no change, increase, or decrease. Afferent...

Explanation how hydrostatic pressures provide the driving force for the filtration process and identify the functional...

Explanation how hydrostatic pressures provide the driving force for the filtration process and identify the functional components of the kidney that contribute to this process.Why can the kidney be considered a endocrine gland and what hormones and their functions originate within components of the nephron? Discriminate between cortical and juxtamedullary nephrons.

Cardiovascular System Blood Blood is made up plasma and _ formed elements. Plasma is mostly...

Cardiovascular System Blood Blood is made up ______ plasma and _______ formed elements. Plasma is mostly ________ with dissolved __________. __________ account for most of the formed elements. These cells transport ___________. RBCs are produced in the ________ in response to ________ that is produced in the ________ in response to _________ White blood cells are a part of the __________. The most common white blood cells are __________ and the least common are ________. ___________ kill bacteria; _________ produce...

Subjects