NONPROTIEN NITROGEN Flashcards by Mr. Z

Q

Where is urea formed?

A

Liver

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Q

Urea comes from metabolism of what?

A

Protein

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Q

Main organ that excretes urea?

A

Kidney

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Q

What does BUN assess?

A

Renal function

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Q

High blood urea is called?

A

Azotemia

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Q

Very high urea + renal failure?

A

Uremia

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Q

Low protein diet effect on urea?

A

Decrease

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Q

Key urea enzyme used in lab?

A

Urease

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Q

Most common urea method?

A

Urease–GLDH

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Q

Urea specimen types?

A

Serum, plasma, urine

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Q

Uric acid comes from metabolism of?

A

Purine

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Q

Organ that forms uric acid?

A

Liver

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Q

Uric acid reabsorption site?

A

Proximal tubule

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Q

Painful uric acid disease?

A

Gout

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Q

Main enzyme for uric acid testing?

A

Uricase

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Q

Nonspecific uric acid method?

Study These Flashcards

A

Phosphotungstic acid

Q

Uric acid specimen?

Study These Flashcards

A

Serum

Q

Drugs that increase uric acid?

Study These Flashcards

A

Thiazides

Q

Creatine is made in the?

Study These Flashcards

A

Liver

Q

Creatinine comes from where in the body?

Study These Flashcards

A

Muscle

Q

Creatinine release rate?

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A

Constant

Q

Creatinine reflects?

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A

GFR

Q

Main creatinine chemical reaction?

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A

Jaffe

Q

Jaffe color formed?

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A

Red-orange

Best reference method for creatinine

IDMS

High creatinine suggests?

Renal damage

Ammonia comes from breakdown of?

Amino acids

Organ that converts ammonia to urea?

Liver

Ammonia blood form?

NH₄⁺

Ammonia mainly affects?

Brain

High ammonia seen in?

Liver failure

Most common ammonia method?

Enzymatic

Ammonia sample handling?

On ice

Smoking effect on ammonia?

Increase

BUN → Urea factor?

×2.14

Urea to BUN FACTOR

x 0.357