Hydrostatic pressure in renal glomerular capillaries

A. False It must be higher to maintain blood flow.

B. False The pressure drop across the afferent arterioles increases as they constrict.

C. True The afferent arterioles offer relatively little resistance.

D. False Redistribution of renal vascular resistance due to autoregulation tends to main-tain glomerular hydrostatic pressure and hence filtration.

E. True Hydrostatic pressure falls due to vascular resistance; oncotic pressure rises due to loss of protein-poor filtrate; both these factors reduce filtration pressure along the length of the glomerular capillary.