PAX PAX (RN) 2

Question 1

A patient's chart shows a serum sodium level of 125 mEq/L. Which condition does this value indicate?

Accepted Answer

Hyponatremia

Answer

Normal serum sodium is 135–145 mEq/L; a level of 125 mEq/L is below normal, indicating hyponatremia.

Question 2

Which of the following best defines osmosis?

Accepted Answer

Movement of water across a semipermeable membrane from low to high solute concentration

Answer

Osmosis is the passive movement of water through a semipermeable membrane toward the area of higher solute concentration.

Question 3

Solve for x: 3x − 7 = 14

Accepted Answer

x = 9

Answer

Adding 7 to both sides gives 3x = 21, then dividing by 3 gives x = 7... wait — 3(7)=21, so x=7. Actually: 3x=21, x=7.

Question 4

Which sentence uses correct subject-verb agreement?

Accepted Answer

The list of medications was reviewed.

Answer

"The list" is a singular subject, so the singular verb "was" is correct; prepositional phrases do not change the subject.

Question 5

Which organelle is responsible for producing ATP through cellular respiration?

Accepted Answer

Mitochondria

Answer

Mitochondria are the site of oxidative phosphorylation, producing the majority of ATP in eukaryotic cells.

PAX Exam Practice Test