Q325 Destroyer (2012) vs. Q14 2009 ADA Test - Contradiction

[daniho]

I found a contradiction and I'm not sure which one is correct.

Q325 on Destroyer (2012) says:
"Phosphate is an abundant anion in cells and will act as the major intracellular buffer."

Q14 on the 2009 ADA test asks:
Which of the following is a major intracellular buffer?
A. TRIS
B. Acetate
C. Phosphate
D. Bicarbonate
E. Calcium carbonate

Can someone help please?

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[Ahmadtoo]

Phosphate is an important buffer for ICF.

Bicarbonate is an important buffer for ISF, although phosphate is present, it's concentration will be very low.

 

[daniho]

Another contradiction (????):

Q31 on 2009 ADA test:
"Growth of long bones originates in epiphysis"

Bootcamp Test 3 (not sure which question)
"Metaphysis - where a majority of growth happens during puberty"

Which one is it??

 

[Ahmadtoo]

Those are 2 completely different worded questions.

They will have 2 different answers.

 

[DAT Destroyer]

You are confusing Bone Growth vs Bone Modeling. Growth takes place at the Epiphysis (Epiphyseal growth plate). Modelling is more active during childhood and adolescence and allows long bones to increase in diameter, change shape and develop marrow cavity. Modelling will continue throughout adult life.

Hope this helps.

 

[510586]

Phosphate is an important buffer for ICF.

Bicarbonate is an important buffer for ISF, although phosphate is present, it's concentration will be very low.

That q14 is wrong then right? Is ISF interstitial fluid?

 

[Ahmadtoo]

That q14 is wrong then right? Is ISF interstitial fluid?

ISF is interstitial fluid.

If he worded the questions exactly, then Q14 is wrong.

If the question said INTERcellular fluid, then it would be correct, must have been a typo on ADA's end.

 

[DAT Destroyer]

I found a contradiction and I'm not sure which one is correct.

Q325 on Destroyer (2012) says:
"Phosphate is an abundant anion in cells and will act as the major intracellular buffer."

Q14 on the 2009 ADA test asks:
Which of the following is a major intracellular buffer?
A. TRIS
B. Acetate
C. Phosphate
D. Bicarbonate
E. Calcium carbonate

Can someone help please?

You are looking at 2 different questions. There is a difference between Intracellular buffer and Intercellular Buffer.

INTRACELLULAR BUFFER is a phosphate buffer.

INTERCELLULAR BUFFER ( Interstitial fluid - ISF) is a Bicarbonate buffer.

Hope this helps.

 

[Ahmadtoo]

You are looking at 2 different questions. There is a difference between Intracellular buffer and Intercellular Buffer.

INTRACELLULAR BUFFER is a phosphate buffer.

INTERCELLULAR BUFFER ( Interstitial fluid - ISF) is a Bicarbonate buffer.

Hope this helps.

He wrote intracellular for both questions.