What happens when capsular hydrostatic pressure were increased?
Glomerular filtration occurs when glomerular hydrostatic pressure exceeds the luminal hydrostatic pressure of Bowman’s capsule. There is also an opposing force, the osmotic pressure, which is typically higher in the glomerular capillary.
What is the role of capsular hydrostatic pressure?
Capsular hydrostatic pressure (CHP) is a back-pressure that opposes filtration. As the filtrate is forced into the capsular space, it meets 2 forms of resistance: the wall of the capsule and the fluid that has already filled the renal tubule. As a result, some filtrate is pushed back into the capillary.
What happens to net filtration If capsular hydrostatic pressure is higher than normal?
The fluid in the glomerular (Bowman’s) capsule is similar to plasma except that it does not contain a significant amount of ________. What would happen if the capsular hydrostatic pressure were increased above normal? a) Net filtration would increase above normal.
What causes capsular hydrostatic pressure?
The fluid in the glomerular capsule creates pressure pushing fluid out of the glomerular capsule back into the glomerulus, opposing the glomerular hydrostatic pressure. This is the capsular hydrostatic pressure.
What would happen if the diameter of the efferent arterioles in the glomerulus decreased?
Urine output will decrease. If the diameter of the efferent arterioles leading away from the glomerulus decreases (vasoconstriction), which of the following is NOT likely to occur? Systemic blood pressure will go up. Glomerular filtration rate will increase.
What would increase the glomerular filtration rate?
Increased blood volume and increased blood pressure will increase GFR. Constriction in the afferent arterioles going into the glomerulus and dilation of the efferent arterioles coming out of the glomerulus will decrease GFR.
What affects net filtration pressure?
The net filtration pressure is determined by the balance of the Starling forces (the hydrostatic pressure and the oncotic pressure within the glomerular capillaries and Bowman’s capsule). An increase in renal arterial pressure (or renal blood flow) causes an increase in GFR.
What would happen if the capsular hydrostatic pressure were increased above normal for example due to an obstruction in the ureter?
An example of this is a ureter obstruction to the flow of urine that gradually causes a fluid buildup within the nephrons. An obstruction will increase the Bowman’s capsule hydrostatic pressure and will consequently decrease GFR.
What effect does increasing afferent arteriole diameter have on GFR and urine production explain your results?
An increase in the afferent arteriolar diameter (decrease in resistance) causes an increase in the glomerular capillary hydrostatic pressure and an increase in GFR. A decrease in the diameter of the afferent arteriole has the opposite effect.
What happens when the afferent arteriole dilates?
Dilation of the afferent arterioles has the opposite effects. The net result of efferent arteriolar constriction is an increased filtration fraction. The GFR most likely decreases because the RBF decreases, but the decrease in the GFR will not be proportionate because of the increase in glomerular capillary pressure.
What happens to GFR when blood pressure increases?
Glomerular filtration is occurs due to the pressure gradient in the glomerulus. Increased blood volume and increased blood pressure will increase GFR. Constriction in the afferent arterioles going into the glomerulus and dilation of the efferent arterioles coming out of the glomerulus will decrease GFR.
