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Q: Does dilation of the afferent arteriole and constriction of the efferent arteriole decrease GFR?
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Dilation of the afferent arteriole decrease GFR?

no, it would increase GFR constriction would decrease GFR


Does dilation of the afferent arteriole decrease Glomular filtration rate?

Yea....about that... AIDS


Is the glomerular filtration rate the same when the efferent arteriole is constricted and dilated?

OLD, INCORRECT ANSWER: Changes in the diameter of the efferent arteriole will either increase (dilation) or decrease (constriction) the blood flow to the glomeruli. An increased flow means a more blood getting filtered over time. NEW, CORRECT ANSWER The 'efferent' arteriole leaves the renal corpuscle. It is easy to remember which direction efferent and afferent things are going by thinking e=exit and a=arrive. If you constrict the efferent arteriole, you actually inhibit blood from leaving the glomerulus, thus increasing the outward hydrostatic pressure pushing fluid into Bowman's capsule and increasing filtration. If you dilate the efferent arteriole, then you reduce pressure in the glomerular capillaries and reduce filtration.


What is ateriole dilation?

Arteriole dilation is an increase in the diameter of a small artery.


How high blood pressure built up in the glomerulus?

It builds up because the calibre of the efferent arteriole is less than that of the afferent arteriole. The cappilary pressure is opposed by the lower osmotic pressure or the blood and the lower filtrate hydrostatic pressure in the glomerular capsule.


Blood pressure is affected by constriction and dilation of?

Arteries and blood vessels.


What is vasomotor instability?

Relating to, causing, or regulating constriction or dilation of blood vessels. Source: Answers.com


What causes sympathetic division stimulation?

with stimulation of the sympathetic nervous system there will be a. constriction of the pupils b. dilation of the coronary arteries c. constriction of selected blood vessels d. profuse sweating


Sympathetic nervous system stimulation causes what?

with stimulation of the sympathetic nervous system there will be a. constriction of the pupils b. dilation of the coronary arteries c. constriction of selected blood vessels d. profuse sweating


How is blood pressure affected when you increase dilation?

Blood pressure drops as dilation increases. This occurs because of decrease resistance.


What is the medical term when the iris is moving?

Dilation of the pupil is known as mydriasis in medical terms. Miosis is the medical term for constriction of the pupil.


What effect does serotonin have on blood vessels?

Serotonin has an constrictive effect on the blood vessels in the brain. It's role in the rest of the body can cause both dilation or constriction.