from an ecg reading a qrs complex represents

ATI RN

ATI Nutrition Practice Test A 2019

1. What does a QRS Complex represent in an ECG reading?

A. Atrial depolarization
B. Ventricular repolarization
C. Ventricular depolarization
D. End of ventricular depolarization

Correct answer: C

Rationale: The QRS Complex in an ECG reading represents ventricular depolarization, which is the process of the heart's ventricles preparing to contract by changing the electrical charge in the cell, hence choice 'C' is the correct answer. Choice 'A' is incorrect because atrial depolarization is represented by the P wave in an ECG reading, not the QRS Complex. Choice 'B' is incorrect as ventricular repolarization is depicted by the T wave, not the QRS Complex. Finally, choice 'D' is also incorrect because the QRS Complex is not the end of ventricular depolarization, but the process itself.

2. A client with chronic kidney disease is being taught about dietary needs by a nurse. Which of the following foods should the nurse identify as being the lowest in phosphorus?

A. Medium apple
B. Bran cereal
C. Scrambled eggs
D. Ground turkey

Correct answer: A

Rationale: The correct answer is A, a medium apple. Apples are a suitable option for clients with chronic kidney disease as they are low in phosphorus. Bran cereal (choice B), scrambled eggs (choice C), and ground turkey (choice D) are all higher in phosphorus content compared to apples, making them less ideal choices for individuals with chronic kidney disease.

3. What type of diet would most likely benefit a patient with cystic fibrosis?

A. Low sodium
B. Low fat
C. Clear liquid
D. High calorie, high protein

Correct answer: D

Rationale: Patients with cystic fibrosis often have malabsorption issues, leading to increased energy needs. A high-calorie, high-protein diet is recommended to help meet these needs, support growth, and maintain overall health. Choices A, B, and C do not address the specific dietary requirements associated with cystic fibrosis, making them less beneficial for these patients.

4. What is the digestive action of bile?

A. It breaks down carbohydrates
B. It breaks down proteins
C. It breaks down lipids
D. It aids in fat digestion

Correct answer: D

Rationale: Bile, which is produced by the liver and stored in the gallbladder, aids in the digestion of fats. It does this by emulsifying the fats, which makes them easier for the digestive enzymes, such as lipase, to break down. While choices A, B, and C could be seen as partially correct since fats are a type of lipid and the process of breaking down fats could be seen as breaking down lipids, the most accurate answer is D, as the primary function of bile is to aid in fat digestion, not the digestion of all types of lipids or the digestion of proteins or carbohydrates.