Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

25. The Urinary System

Renal Physiology: Regulation of Glomerular Filtration

Anatomy & Physiology

25. The Urinary System

Renal Physiology: Regulation of Glomerular Filtration

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3:10 minutes

Problem 8

Textbook Question

If a freshly voided urine sample contains excessive amounts of urochrome, it has
a. An ammonia-like odor
b. A pH below normal
c. A dark yellow color
d. A pH above normal

Verified step by step guidance

Understand the term 'urochrome': Urochrome is a pigment that gives urine its yellow color. It is a byproduct of the breakdown of hemoglobin in the liver and is excreted in urine.

Analyze the relationship between excessive urochrome and urine color: Excessive amounts of urochrome in a urine sample would intensify the yellow color, making it appear darker than normal.

Review the options provided in the question: The options include ammonia-like odor, pH below normal, dark yellow color, and pH above normal. Consider which of these is directly related to the presence of excessive urochrome.

Eliminate unrelated options: Excessive urochrome does not affect the pH of urine (either below or above normal) nor does it contribute to an ammonia-like odor. These characteristics are influenced by other factors such as diet, hydration, or bacterial activity.

Conclude the correct association: Based on the analysis, excessive urochrome is most directly linked to a dark yellow color in the urine sample.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Urochrome

Urochrome is a pigment that gives urine its characteristic yellow color. It is a byproduct of the breakdown of hemoglobin and is typically present in varying concentrations. Excessive amounts of urochrome can indicate dehydration or other metabolic conditions, leading to darker urine.

Urine pH

The pH of urine indicates its acidity or alkalinity, which can vary based on diet, hydration, and health status. Normal urine pH ranges from 4.5 to 8.0. A pH below normal suggests acidosis, while a pH above normal indicates alkalosis, both of which can be influenced by various factors including diet and metabolic processes.

Urine Odor

The odor of urine can provide insights into a person's health and hydration status. A strong ammonia-like odor may indicate concentrated urine, often due to dehydration or certain dietary choices. Changes in urine odor can also signal infections or metabolic disorders, making it an important aspect of urine analysis.

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Related Practice

Textbook Question

Drugs that treat hypertension, or high blood pressure, have the following actions. Discuss the specific effect that each drug will have on the kidneys.

b. Blocking the receptor for angiotensin-II on blood vessels and in the renal tubule cells

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Textbook Question

Explain how each of the drugs in question 1 from this section would lower blood pressure.

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Textbook Question

Mr. Wu is a patient with kidney disease who presents to your clinic for monitoring. You notice on his chart that his GFR was estimated through inulin administration to be about 35 ml/min. What does this tell you about the health of his kidneys? Mr. Wu is taking a medication that is normally excreted from the body in the urine. You order blood work and find that the concentration of this medication in his plasma is much higher than normal. How does his decreased GFR explain the elevated level of medication in his plasma?

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Textbook Question

Deana is a 4-year-old girl with a rare genetic defect that causes the Na⁺/glucose symporters in the proximal tubule to reabsorb fewer glucose and sodium ions than normal. Predict the effects this defect will have on the composition and volume of Deana's urine. Explain why you would expect to see increased activity of the tubuloglomerular feedback and the renin-angiotensin-aldosterone system in Deana's kidneys.

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Textbook Question

The lowest blood concentration of nitrogenous waste occurs in the

a. Hepatic vein

b. Inferior vena cava

c. Renal artery

d. Renal vein