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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 else can I help you with?
What happens if the diameter of the efferent arteriole is constricted?
When the afferent arteriole is constricted it causes blood to be unable to flow into the glomerulus, overall decreasing hydrostatic pressure and causing the bowman's capsule to decrease filtration.
Where does the transition from an afferent arteriole to an efferent arteriole occur?
glomerulus. The afferent arteriole leads to a ball of capillaries called a glomerulus which is enclosed in a nephron structure called the glomerular capsule. Blood leaves the glomerulus by way of the efferent arteriole.
The factor favoring filtrate formation at the glomerulus is?
The high pressure in the glomerulus due to the afferent arteriole being larger than the efferent arteriole favors filtrate formation by pushing fluid and solutes out of the blood into the glomerular capsule. Additionally, the high permeability of the glomerular capillaries allows for easy passage of water and small solutes, promoting the formation of filtrate.
Define glomerular filtration rate Name and describe the pressures which are effective at the glomerulus under normal conditions and result in glomerular filtration?
Glomerular filtration is a passive process in which hydrostatic pressure forces fluids and solutes through a membraneThe glomerular filtration rate (GFR) is directly proportional to the net filtration pressure and is about 125 ml/min (180 L/day).The glomeruli function as filters. High glomerular blood pressure (55 mm Hg) occurs because the glomeruli are fed and drained by arterioles, and the afferent arterioles are larger in diameter than the efferent arterioles.
Is the afferent arteriole entering the glomerulus always thicker than the efferent arteriole leaving the glomerulus?
It always has a widre lumen so that blood is forced to diffuse and filter. This puts a little more stress on the afferent arteriole and so a slight increase in the thickness of the tunica media may be noted.
What is the effect of constricted arterioles in the glomerular filtration rate?
Constricted arterioles in the glomerulus can lead to a decrease in the glomerular filtration rate (GFR) by reducing the amount of blood flow entering the glomerulus. This can result in decreased filtration of waste and reduced urine production.
When the afferent arteriole radius is 0.35 mm and the efferent arteriole radius is 0.40 mm what is the glomerular filtration rate?
26.74!
What happens if the diameter of the efferent arteriole is constricted?
When the afferent arteriole is constricted it causes blood to be unable to flow into the glomerulus, overall decreasing hydrostatic pressure and causing the bowman's capsule to decrease filtration.
Where does the transition from an afferent arteriole to an efferent arteriole occur?
glomerulus. The afferent arteriole leads to a ball of capillaries called a glomerulus which is enclosed in a nephron structure called the glomerular capsule. Blood leaves the glomerulus by way of the efferent arteriole.
How do you increase your GFR?
To increase your glomerular filtration rate, blood flow needs to be increased to the kidneys and the impaired kidneys function restored. The glomerular filtration rate, of GFR, measures how much blood passes through the glomeruli into the kidneys each minute.
The glomerular capillaries differ from other capillary networks in the body because they?
It is unique from other capillary beds in that it is supplied with and drained by arterioles, the afferent arteriole and efferent arteriole, respectively.
Know relationships and differences between Afferent vs efferent arterioles?
afferent glomerular arteriole a branch of an interlobular artery that goes to a renal glomerulus.efferent glomerular arteriole one arising from a renal glomerulus, breaking up into capillaries to supply renal tubules.Remember because they are arterioles NOT venules they they both carry blood away from the heart.
What is the blood vessel that drains blood from the glomerulus?
Efferent arteriole takes the blood away from the glomerulus
Why does blood get filtered by the kidneys?
Blood pressure promotes filtration of blood in the kidneys by, generally, being greater in pressure than blood colloid osmotic pressure and glomerular capsule pressure which produces a net filtration pressure of about 10 mm Hg. Net filtration pressure forces a large volume of fluid into the capsular space. When blood pressure increase or decreases slightly, changes in the diameters of the afferent and efferent arterioles can actually keep net filtration pressure steady to maintain normal glomerular filtration. Constriction of the afferent arteriole decreases blood flow into the glomerulus, which decreases net filtration pressure. Constriction of the efferent arteriole slows outflow of blood and increases net filtration pressure.
What is the arteriole that contains cleaner blood because it has been filtered by the glomerulus?
The efferent arteriole contains cleaner blood after filtration by the glomerulus because some waste products and excess substances have been removed during the process of blood filtration in the kidneys. This filtered blood then continues on to be circulated throughout the body.
What are the two capillary beds that are in series in the excretory system of humans?
The first capillary bed in the series is the glomerular capillary, where filtration occurs. The efferent arteriole on the distal end of the glomerular capillary. Objects it to the next capillary bed in the series: the peritubular capillary. This is where secretion and reabsorbtion take place. This type of system is an example of an arterial portal system.
The factor favoring filtrate formation at the glomerulus is?
The high pressure in the glomerulus due to the afferent arteriole being larger than the efferent arteriole favors filtrate formation by pushing fluid and solutes out of the blood into the glomerular capsule. Additionally, the high permeability of the glomerular capillaries allows for easy passage of water and small solutes, promoting the formation of filtrate.
