CH. 19

(pt E) Calculate the net filtration pressure if capillary hydrostatic pressure is 60 mm Hg, capillary osmotic pressure is 25 mm Hg, and capsular hydrostatic pressure is 10 mm Hg.

25 mm Hg

19.R1 The functional unit of the kidney is the __________.

nephron

( pt D) If the osmotic pressure in the glomerular capillaries increased from 28 mm Hg to 35 mm Hg, would net filtration increase or decrease?

net filtration would decrease

(pt C) Which substance would be found in higher concentration if the membrane were damaged?

protein

(pt B) What is the primary driving force (pressure) that produces glomerular filtration?

hydrostatic pressure of blood (blood pressure)

19.4 Urine is produced by the

kidney.

19.5 Urine is carried to the urinary bladder by

the ureters.

(pt C) The flow of filtrate through the tubules is elevated. Complete the following statements to indicate the effects of this high rate of flow. The descriptive terms may be used once, more than once, or not at all.

- Filtrate flow through the renal tubule increases when glomerular filtration rate increases. - When filtrate flow through the renal tubule increases, reabsorption of sodium chloride by the tubule decreases. -When filtrate flow through the renal tubule increases, the concentration of sodium chloride remaining in the filtrate increases. - When filtrate flow through the renal tubule increases, the macula densa responds by releasing vasoconstrictors. - When filtrate flow through the renal tubule increases, the afferent arteriole responds by vasoconstricting.

(IP 2.0 Glomerular Filtration) When the macula densa detects an increase in NaCl concentration in the renal filtrate, what happens to the glomerular filtration rate (GFR)?

GFR decreases.

(B) If the osmotic pressure in the glomerular capillaries increased from 28 mmHg to 35 mmHg due to dehydration, would net filtration increase or decrease?

Net filtration would decrease.

19.12 A glomerulus is

a "ball" of capillaries within Bowman's capsule.

(IP: Glomerular filtration) Which of the following substances is not normally found in filtrate?

blood cells and large particles

19.23 The force for glomerular filtration is the

blood pressure in the glomerular capillaries.