Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 33, Problem 5WIO
Summary Introduction
To explain:
The reason why exercise increases the urea concentration in urine.
Concept introduction:
Excretion is the process in which the metabolic and toxic wastes are removed from the body through urine. Kidneys play a crucial in the removal of toxins from the body as the filtration process takes place in the functional unit nephrons of the kidneys.
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Explain why exercise increases the urea concentration in urine.
Discuss the importance of the kidney filtering urea out of the blood.
The concentration of urea in urine is always much higher than the concentration in plasma. Does this mean that urea is secreted? Hint: remember that concentration is a ratio.
Chapter 33 Solutions
Biology: Concepts and Investigations
Ch. 33.1 - Prob. 1MCCh. 33.1 - Prob. 2MCCh. 33.1 - Prob. 3MCCh. 33.2 - What is osmoregulation, and why is it important?Ch. 33.2 - Prob. 2MCCh. 33.2 - Prob. 3MCCh. 33.3 - Prob. 1MCCh. 33.3 - Prob. 2MCCh. 33.4 - Prob. 1MCCh. 33.4 - Prob. 2MC
Ch. 33.5 - What three processes occur in urine formation?Ch. 33.5 - Prob. 2MCCh. 33.5 - Describe the roles of antidiuretic hormone and...Ch. 33.6 - Prob. 1MCCh. 33.6 - Prob. 2MCCh. 33 - Prob. 1MCQCh. 33 - Prob. 2MCQCh. 33 - Prob. 3MCQCh. 33 - Prob. 4MCQCh. 33 - Prob. 5MCQCh. 33 - Which of the following components of glomerular...Ch. 33 - Prob. 7MCQCh. 33 - Prob. 1WIOCh. 33 - Prob. 2WIOCh. 33 - Prob. 3WIOCh. 33 - Prob. 4WIOCh. 33 - Prob. 5WIOCh. 33 - Prob. 6WIOCh. 33 - How does the kidney reduce the volume of urine to...Ch. 33 - Prob. 8WIOCh. 33 - Prob. 1PITCh. 33 - Prob. 2PITCh. 33 - Prob. 3PIT
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- Describe the three processes involved in urine formation: filtration, secretion and reabsorption. Discuss the formula: E = F – R + S.arrow_forwardExplain why even a severely dehydrated person inevitablyexperiences further fluid loss.arrow_forwardDiscuss the importance of the kidney filtering urea out of the blood in greater detail.arrow_forward
- Wrestlers often fast and dehydrate to stay in a specific weight class. What abnormal urine values may be shown during the urinalysis of a wrestler? Explain.arrow_forwardExplain why not reabsorbing bicarbonate (HCO3-) and Glucose lead to acidosis and polyuria (respectively).arrow_forwardIf only a very small amount of urea were present in the interstitial fluid of the kidney instead of its normal concentration, how would it affect the kidney's ability to concentrate urine? asaparrow_forward
- Describe the role of a portal system in the kidney. Explain how urine osmolarity is hormonally regulated and describe the regulation of major ions by the kidney. Summarize the role of the kidneys in maintaining acid-base balance.arrow_forwardAfter about 6 weeks of fasting, the production of urea isdecreased. Explain.arrow_forwardGiven: For urea, the rate of excretion equals to the GFR times the urea concentration in plasma. (A) If the urea concentration in plasma is 4.5 mmol/l, what GFR (in l/day) would correspond to an excretion rate of 450 mmol/day. (B) If the urea clearance is 70 ml/min and the GFR is 125 ml/min, what fraction of urea is being reabsorbed. (answer A and B)arrow_forward
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