Marine reptiles eliminate excess salt by a. transport across their gills. b. excretion through salt glands. c. reabsorption in the nephron tubules. d. excretion through the cloaca.
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Marine reptiles eliminate excess salt by
a. transport across their gills.
b. excretion through salt glands.
c. reabsorption in the nephron tubules.
d. excretion through the cloaca.
Step by step
Solved in 4 steps
- The function unique to the nephron loop is to a. regulate pH. b. excrete water. c. establish a concentration gradient in the medulla interstitial fluid. d. regulate the concentration of blood Ca2+.Long nephron loopsa. are common in animals with access to abundant freshwater.b. allow urine to become concentrated within thecollecting duct.c. are the most common type of nephron loop in humans.d. extend deep into the renal cortex.Water moves out of the filtrate of the descending limb of the nephronloop becausea. there is a high concentration of solutes in the surrounding fluid.b. the cells of the descending limb are permeable to ions.c. the difference in the diameter of the arterioles creates a pressuregradient.d. there is a high concentration of solutes in the descending limb.
- Beavers have relatively little need toconserve water and could therefore beexpected to have than humans do.a. fewer nephronsb. longer nephron loopsc. shorter nephron loopsd. longer collecting ductse. longer convoluted tubuleThe nephridia of an earthworm differs from the human nephron in that the nephridia: O a. Has no reabsorption of water. O b. Is excreting ammonia instead of urea. Oc. Selectively pumps ammonia into the nephridia. O d. Does not filter the blood. e. Has no reabsorption of salts.Which of the following structures is most effective for the excretion of excess water? A. The Malpighian tubules of an insect B. The rectal gland of a shark C. The flame cells of a flatworm D. The ionocytes of a crayfish E. All of the above are equally effective in the excretion of excess water
- Describe structure of the nephron. How is the mammalian nephron capable of creating concentrated urine? How does filtration take place?Which of the following rows correctly identifies the function of a region of the nephron? Nephron region and function Row Region of a nephron Function A. collecting duct secretion glomerulus filtration descending loop of Henle secretion ascending loop of Henle filtration Rowman's capsules? B. C. D. Select one: O a. A cb. B O c. C O d. DMost absorption and secretion occurs in this part of the nephron. a. proximal convoluted tubule b. descending loop of Henle c. ascending loop of Henle d. distal convoluted tubule e. collecting ducts
- The main function of the nephron loop is to: A. Eliminate acid B. Recover glucose and salt from the tubule fluid C. Create a high osmotic concentration in use extracellular fluid of the renal medulla allowing water recovery D. Secrete drugs scubas penicillin This is not and will not be graded. W hich of the following describes the countercurrent mechanism of the nephron loop? A. W ater moves out of the ascending timb; sodium moves in the ascending limb. B. W ater moves in the ascending limb; sodium moves out of the ascending limb. C. W ater moves out of the descending limb; sodium moves out of the ascending limb. D. W ater moves in the descending limb; sodium moves out of the descending limb. E. W ater moves in the ascending limb; sodium moves in the ascending limb.Excretion of a hypertonic urine in humans is associated best witha. the glomerular capsule.b. the proximal convoluted tubule.c. the loop of the nephron.d. the collecting duct.e. Both c and d are correct.