Question 1
Passage 1: In a hemodialysis cartridge, blood and dialysate flow on opposite sides of a semipermeable membrane. Small ions and urea can cross the membrane, but blood cells and most plasma proteins cannot. The dialysate contains a bicarbonate buffer with pKa 6.1 and pH 7.4. What is the approximate ratio [HCO3-]/[H2CO3] in the dialysate?
Correct Answer:
20:1
Explanation:
Using Henderson-Hasselbalch, pH = pKa + log([base]/[acid]). Thus [base]/[acid] = 10^(7.4-6.1) = 10^1.3, which is about 20.
Question 2
Passage 1: In a hemodialysis cartridge, blood and dialysate flow on opposite sides of a semipermeable membrane. Small ions and urea can cross the membrane, but blood cells and most plasma proteins cannot. The dialysate contains a bicarbonate buffer with pKa 6.1 and pH 7.4. If the concentration gradient for urea is unchanged but the membrane area is doubled, what happens to the initial diffusion rate?
Correct Answer:
It doubles
Explanation:
Fick's law makes diffusion rate directly proportional to membrane area when the concentration gradient and membrane thickness are unchanged. Doubling area doubles the rate.
Question 3
Passage 1: In a hemodialysis cartridge, blood and dialysate flow on opposite sides of a semipermeable membrane. Small ions and urea can cross the membrane, but blood cells and most plasma proteins cannot. The dialysate contains a bicarbonate buffer with pKa 6.1 and pH 7.4. Which observation would most directly confirm that albumin is retained by the membrane because of its large molecular size?
Correct Answer:
Albumin remains in the blood while urea equilibrates across the membrane
Explanation:
A size-selective membrane should permit a small solute such as urea to cross while retaining a much larger protein such as albumin. That paired observation directly tests size selectivity.
Question 4
Passage 1: In a hemodialysis cartridge, blood and dialysate flow on opposite sides of a semipermeable membrane. Small ions and urea can cross the membrane, but blood cells and most plasma proteins cannot. The dialysate contains a bicarbonate buffer with pKa 6.1 and pH 7.4. Carbonic anhydrase accelerates the interconversion of CO2 and carbonic acid in blood. Which effect does the enzyme have on this reversible reaction?
Correct Answer:
It lowers activation energy in both directions without changing equilibrium
Explanation:
Enzymes lower activation energy for both forward and reverse reactions. They speed attainment of equilibrium but do not change the equilibrium constant or reaction free-energy difference.
Question 5
Passage 1: In a hemodialysis cartridge, blood and dialysate flow on opposite sides of a semipermeable membrane. Small ions and urea can cross the membrane, but blood cells and most plasma proteins cannot. The dialysate contains a bicarbonate buffer with pKa 6.1 and pH 7.4. A dialysate contains 0.150 M NaCl and the salt is assumed to dissociate completely. What is its approximate osmolarity due to NaCl?
Correct Answer:
0.300 Osm/L
Explanation:
NaCl produces approximately two dissolved particles per formula unit, Na+ and Cl-. The ideal osmolarity is therefore 2 x 0.150 = 0.300 Osm/L.
Question 1
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About this Exam


The Certified Inpatient Coder (CIC) credential from AAPC is the premier certification for medical coders focusing on the hospital inpatient setting. This specialized designation proves your mastery of reviewing complex medical records and accurately assigning ICD-10-CM and ICD-10-PCS codes. It is designed for experienced coders or those who have completed comprehensive training and wish to work in the heart of hospital systems. By earning your CIC, you demonstrate to employers that you understand the unique reimbursement methodologies, such as MS-DRGs, that are crucial for facility funding.

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What the Course Entails and Exam Details

To prepare for this rigorous exam, your studies must cover several core domains essential to facility coding. You will need a foundational knowledge of medical terminology, anatomy, and pathophysiology to interpret detailed documentation. The curriculum focuses heavily on mastering the ICD-10-CM coding guidelines for diagnoses. A major component of the training is mastery of the complex ICD-10-PCS (Procedure Coding System) used exclusively in inpatient settings. You must also understand the Inpatient Prospective Payment System (IPPS) and regulatory compliance issues.


What to Expect in the Final Exam

The official AAPC CIC exam is a challenging assessment designed to simulate real-world coding scenarios. The examination consists of a total of 47 questions that must be completed within four hours. These are split between 40 multiple-choice questions and 7 inpatient coding cases requiring fill-in-the-blank responses. You are permitted to use approved code books during the exam, including your current ICD-10-CM and ICD-10-PCS manuals. To earn your certification, you must achieve an overall passing score of 70% or higher.


How to Study and Exam Centers

Effective preparation requires dynamic study methods that go beyond simple reading. The most critical study tool is regular use of official CIC Practice Exams, which mirror the format and difficulty of the actual test. Focus heavily on the practical cases to improve your speed in reading medical records and assigning PCS codes. You have flexible options for taking the final exam. AAPC offers the exam through their online remote proctoring service, allowing you to test securely from your home. Alternatively, you can schedule to take the computerized exam at an authorized Meazure Learning testing center location.


Job Opportunities from the Course

Earning your CIC credential significantly enhances your marketability and opens doors to lucrative facility roles. Common job titles for certified individuals include Inpatient Medical Coder and Inpatient Coding Auditor. You may also qualify for positions such as DRG Validator or Facility Coding Compliance Specialist. With experience, this certification can lead to leadership roles like Inpatient Coding Supervisor or Manager.

 

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