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Ch. 40 - Water and Electrolyte Balance in Animals
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All textbooksFreeman 8th EditionCh. 40 - Water and Electrolyte Balance in AnimalsProblem 4

Chapter 39, Problem 4

Fill in the blank: In Gila monsters, the organ in which water from urine is reabsorbed into the bloodstream is the              .

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Hello everyone and welcome to today's video. So the maximum reabsorption of water from the kidneys back into the blood takes place from. And so we're giving certain structures present in the kidneys that we need to select this from. So the net from is a functional structure of the kidney and it is divided into these structures, which is the renal corpses called the proximal convoluted tubules, handless loop and the distal convoluted tubules from all these structure. The proximal convoluted tubules has the highest surface area because of the presence of the crew boy epithelium and a brush border that give it this very high surface area because it has such a high surface area because it's so big, most of water reabsorption in the kidneys is going to take place here is going to be about 90% of water reabsorption that takes place here. So, answer choice C the proximal convoluted tobel is going to be the correct answer for this question. I really hope this video helped you and I hope to see you on the next one.
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Textbook Question

Which of the following statements regarding fishes that live in fresh water is/are correct? Select True or False for each statement. T/F Water moves across the gills via osmosis until equilibrium is established, at which time the water molecules stop moving. T/F They lose water to their environment primarily through the gills. They replace this water by drinking. T/F Water enters epithelial cells in their gills via osmosis. Electrolytes leave the same cells via diffusion. T/F They have specialized epithelia that actively pump electrolytes from the environment into the blood.

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Which of the following organisms would lose the most water by osmosis across its gills? a. marine bony fish b. shark c. freshwater fish d. freshwater invertebrate

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What effect does antidiuretic hormone (ADH) have on the nephron? a. It increases water permeability of the descending limb of the loop of Henle. b. It decreases water permeability of the descending limb of the loop of Henle. c. It increases water permeability of the collecting duct. d. It decreases water permeability of the collecting duct.

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Compare and contrast the types of nitrogenous wastes excreted by animals. Identify which type can be excreted with the least water, which is most toxic, and which waste is excreted by bony fishes, by mammals, and by insects. Which type would you expect to be produced by embryos inside eggs laid on land?

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The chloride cells of fish gills have a high density of mitochondria. How does this characteristic relate to the functional role of chloride cells? Would you expect other epithelial cells involved in ion transport to contain large numbers of mitochondria? Explain.

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Explain why mammals would not be able to produce concentrated urine if their nephrons lacked loops of Henle.

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