True False ch 25
10) In the absence of hormones, the distal tubule and collecting ducts are relatively impermeable to water
TRUE
14) Aldosterone is a hormone that causes the renal tubules to reclaim sodium ions from the filtrate
TRUE
1) If the GFR is too low, needed substances may pass so quickly through the renal tubules that they are not absorbed and instead are lost in the urine.
FALSE
11) The collecting duct is impermeable to water in the presence of ADH
FALSE
13) Angiotensin II is a substance made by the body to lower blood pressure during stress.
FALSE
15) Blood pressure in the renal glomerulus is lower than in most parts of the body in order to conserve body water
FALSE
16) The proximal convoluted tubule is the portion of the nephron that attaches to the collecting duct
FALSE
19) The myogenic mechanism reflects the tendency of vascular smooth muscle to stretch.
FALSE
20) An excessive urine output is called anuria
FALSE
27) Having a kinked ureter is called renal ptosis
FALSE
9) Glomerular filtration is an ATP-driven process.
FALSE
2) In the kidneys, the countercurrent mechanism involves the interaction between the flow of filtrate through the loop of Henle of the juxtamedullary nephrons (the countercurrent multiplier) and the flow of blood through the limbs of adjacent blood vessels (the countercurrent exchanger). This relationship establishes and maintains an osmotic gradient extending from the cortex through the depths of the medulla that allows the kidneys to vary urine concentration dramatically
TRUE
21) Tubular secretion is effective in controlling blood pH
TRUE
26) Obligatory water reabsorption involves the movement of water along an osmotic gradient
TRUE
3) The ureter transports urine from the kidney to the urinary bladder
TRUE
4) Water reabsorption through the proximal convoluted tubule is termed obligatory water reabsorption, whereas water reabsorption through the distal convoluted tubule is termed facultative water reabsorption.
TRUE
5) The position of the kidneys behind the peritoneal lining of the abdominal cavity is described by the term retroperitoneal.
TRUE
6) The entire responsibility for urine formation lies with the nephron.
TRUE
7) Urine is 95% water by volume.
TRUE
