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define the term osmoregulation and why would it be important for living things to be able to osmoregulate their bodies?

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 28CTQ: Why is excretion important in order to achieve osmotic balance?

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Why is excretion important in order to achieve osmotic balance?
As the text noted, two-thirds of the water and solutes that the body reclaims by reabsorption in nephrons occurs in the proximal tubule. Proximal tubule cells have large numbers of mitochondria and demand a great deal of oxygen. Explain why.
Water and small solutes enter nephrons during ________. a. filtration b. reabsorption c. secretion d. both a and b
Which of the following does not contribute to the process of filtration? (a) active transport by epithelial cells lining renal tubules (b) large surface area for filtration (c) low permeability of glomerular capillaries (d) high hydrostatic blood pressure in glomerular capillaries (e) podocytes
As a person ages, nephron tubules lose some of their ability to concentrate urine. What is the effect of this change?
A urinalysis reveals that the patients urine contains glucose, hemoglobin, and white blood cells (pus). Are any of these substances abnormal in urine? Explain.
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