Knowledge Check

Where are amino acids absorbed:

a
Stomach
b
Small intestine
c
Large intestine

Once absorbed by the small intestine, where are amino acids transported to:

a
Large intestine
b
Spleen
c
Liver
Correct; via the portal vein
d
Kidney

Catabolism of amino acids in the liver results in formation of ammonia (NH3) and carbon skeletons.

Catabolism of amino acids in the liver results in formation of ammonia (NH3) and carbon skeletons.

True or false: The urea cycle is present in all cell types of the body.

a
True
b
False
The urea cycle is almost exclusively found in the liver.

What is the effect of a dietary protein load on the production of urea by the urea cycle:

a
No effect
b
Decreased urea production
c
Increased urea production

Which of the following statement(s) is/are correct:

a
Blood urea levels are influenced by glomerular filtration rate
b
Blood urea levels are influenced by muscle mass
c
Blood urea levels are influenced by dietary protein load
d
Blood urea levels are influenced by GI bleeding

True or false: the term “blood” urea level is a misnomer.

a
True
It should really be called serum or plasma urea level.
b
False

Which of the following statement(s) is/are correct:

a
Serum creatinine levels reflect glomerular filtration rate
b
Serum creatinine levels are influenced by muscle mass
c
Serum creatinine levels are influenced by dietary protein load
d
Serum creatinine levels are influenced by GI bleeding

True or false: Upper GI bleed may lead to increased blood urea without a change in serum creatinine (resulting in an elevated BUN: creatinine ratio).

a
True
b
False

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