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Ch. 24 The Urinary System

Chapter 24, Problem 24.2a

What might it mean if you found a high concentration of urobilinogen in your patient's urine? (Hint: Consider the source of urobilinogen.) (Connects to Chapter 19)

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Hi, everybody. Welcome back. The next question says, which of the following conditions could lead to elevated urobilinogen in the urine? A hypertension B, osteoporosis, C hypothyroidism or D sickle cell anemia. Well, the way to think through this is to recall, where does your bonogen come from? And the answer is, it's a product of the breakdown of Billy Rubin and bilirubin. We can recall is a product of a breakdown of red blood cells. So there will always be a little bit of gen in the urine since your blood cells, the ones that get too old or broken down. But if there's an elevated level, it means something is causing an increased rate of breakdown of red blood cells. So let's look at our conditions and think which one or more than one there might be is involved and would cause increased breakdown of red blood cells. And that leads to the only one here that involves blood, which is choice d sickle cell anemia and sele cell anemia. You have those abnormally shaped red blood cells due to the defect in the hemoglobin protein. And as a result, those red blood cells have a decreased lifespan So with a shorter lifespan, you would see increased breakdown and therefore elevated gen. Let's look at our other answer. Choices. Just briefly hypertension. Choice A is of course elevated blood pressure. Now, over time, this can damage the kidney and then the kidney might have problems filtering out various compounds and cause issues with something like elevated ural ingen. But that would be a very remote connection. Just plain high blood pressure is not going to directly cause this elevated gen level. So choice a not our answer. Tras v osteoporosis is that condition of weakened bones. Of course, that's primarily an effect on the skeletal system and won't have a direct effect on these levels. And then choice C. So we'll cross out B hypothyroidism is a condition where the thyroid isn't making enough thyroid hormone. And while this can have various health effects, again, it won't be a direct cause of what we're seeing here. So all three answers A B and C are wrong because they are not a direct cause of that elevated bilirubin urbino saying totally the wrong word there in the urine. So the condition that would lead to this is choice d sickle cell anemia. Hope to see you in the next video.
Related Practice
Textbook Question

Fill in the blanks for each of the following statements:


a. The process by which urine is eliminated is called _____ , and it is mediated by reflexes involving the_____​nervous system.

b. The mucosa of the organs of the urinary tract is lined with _____epithelium.

c. The three layers of smooth muscle in the urinary bladder are known as the_____muscle.

d. The female urethra provides a passageway for , whereas the male urethra provides a passageway for_____and_____ .

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Textbook Question

Which of the following is not a physiological process carried out by the kidneys?


a. Blood pressure regulation

b. Tubular reabsorption

c. Tubular secretion

d. Glomerular filtration

e. All of the above are physiological processes carried out by the kidneys.

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Textbook Question

Trace the pathway taken by a molecule of urea through the kidney from the glomerulus to the renal pelvis if the urea is recycled.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.


a. The kidneys are retroperitoneal and covered by three layers of connective tissue.

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Textbook Question

Explain why urinary tract infections, which involve the urethra and urinary bladder, are much more common in females than males.

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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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