ATI RN
ATI Anatomy and Physiology Questions
Question 1 of 5
What is the maximum capacity of a normal adult bladder before involuntary micturition is likely to occur?
Correct Answer: B
Rationale: The correct answer is B: 300-600ml. A normal adult bladder can hold approximately 300-600ml of urine before the urge to urinate becomes strong and involuntary micturition is likely to occur.
Choice A (800-900ml),
Choice C (1000-2000ml), and
Choice D (400-700ml) all exceed the typical capacity of a normal adult bladder and would generally not be accurate in the context of involuntary micturition.
Question 2 of 5
What effect does aldosterone secretion have on electrolyte levels?
Correct Answer: B
Rationale: Aldosterone is a hormone that primarily acts on the kidneys to increase the reabsorption of sodium and water into the bloodstream. As a result, sodium levels are increased.
Choices A, C, and D are incorrect. Aldosterone does not significantly affect calcium, potassium, or magnesium levels.
Question 3 of 5
An occurrence of too high a concentration of which of the following electrolytes is associated with cardiac arrhythmias?
Correct Answer: C
Rationale: The correct answer is potassium. High levels of potassium in the blood, known as hyperkalemia, can lead to cardiac arrhythmias by affecting the electrical activity of the heart. This can disrupt the normal rhythm of the heart and lead to serious complications. Chloride, phosphorus, and sodium imbalances are not typically associated with cardiac arrhythmias, making them incorrect choices.
Question 4 of 5
Which of the following is the measurement of the percentage of red blood cells in whole blood?
Correct Answer: A
Rationale: The correct answer is 'Hematocrit.' Hematocrit is the measurement of the percentage of red blood cells in whole blood. It is used to diagnose conditions such as anemia and dehydration.
Choice B, 'Hemoglobin,' measures the amount of hemoglobin in the blood, not the percentage of red blood cells.
Choice C, 'Mean corpuscular volume,' measures the average volume of a red blood cell, not the percentage of red blood cells.
Choice D, 'Reticulocyte count,' measures the percentage of young red blood cells in the blood, not the percentage of red blood cells.
Question 5 of 5
An individual with which of the following blood type can receive only blood of that same type?
Correct Answer: A
Rationale: The correct answer is Type O. Individuals with blood type O can only receive blood from donors with blood type O. This is because type O blood lacks both A and B antigens, so if a person with type O blood receives blood with A, B, or AB antigens, their immune system will recognize these as foreign substances and attack them.
Choices B, C, and D are incorrect because individuals with type A can receive blood from A or O donors, individuals with type B can receive blood from B or O donors, and individuals with type AB can receive blood from A, B, AB, or O donors.