Chapter 7, Problem 4CTE

Flame cells are primitive excretory organs found in. arthropods annelids mammals flatworms

Blood pressure forces water and small solutes out of blood and into nephrons during ________. a. glomerular filtration c. tubular secretion b. tubular reabsorption d. both a and c

Figure 41.6 Which of the following statements about the nephron is false? The collecting duct empties into the distal convoluted tubule. The Bowman’s capsule surrounds the glomerulus. The loop of Henle is between the proximal and distal convoluted tubules. The loop of Henle empties into the distal convoluted tubule.

Water and small solutes enter nephrons during ________. a. filtration b. reabsorption c. secretion d. both a and b

Match each .structure with a function. _____ ureter a. start of nephron _____ Bowmans capsule b. delivers urine to body surface _____ urethra c. carries urine from kidney to bladder _____ collecting tubules d. secretes ADH _____ glomerulus e. target to aldosterone _____ pituitary gland f. cluster of leaky capillaries

Fatty tissue holds the kidneys in place. Extremely rapid weight loss may cause this tissue to shrink so that the kidneys slip from their normal position. On rare occasions, the slippage can put a kink in one or both ureters and block urine flow. Suggest what might then happen to the kidneys.

Explain what happens to Na+ concentration in the nephron when GFR increases.

Which of the following is an example of autoregulation of kidney function? a. The RAAS regulates Na1 by secreting renin when blood pressure or blood volume decreases. b. The ADH system regulates water balance by decreasing water reabsorption and increasing excretion of salt. c. Receptors in the juxtaglomerular apparatus detect a higher salt concentration in the distal convoluted tubule and trigger constriction of the afferent arteriole to reduce glomerular filtration rate. d. ANF is released by the kidney to increase renin release. e. Angiotensin II lowers blood pressure by constricting arterioles.

Explain how the kidneys help to maintain the balance of acids and bases in extracellular fluid.