ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
A person with a blood pressure of 135/75 has a pulse pressure of:
Correct Answer: A
Rationale: Pulse pressure is systolic pressure minus diastolic pressure: 135 - 75 = 60 mmHg. This reflects the force of ventricular ejection.
Question 2 of 5
The nurse is caring for a college student who has reported periods of rapid heart rate and palpitations immediately prior to an important examination. The nurse is aware that these changes are likely due to which of the following?
Correct Answer: B
Rationale: Rapid heart rate and palpitations before an exam are due to the sympathetic nervous system’s stress response, releasing adrenaline to increase heart rate. The parasympathetic system slows heart rate, and the other options are less directly related to acute stress.
Question 3 of 5
Iron-deficiency anemia:
Correct Answer: D
Rationale: Iron-deficiency anemia, common in chronic blood loss (e.g., menstruation), depletes iron for hemoglobin. It’s more common in women, doesn’t affect leukocytes, and is typically treated with oral iron (injections are rare).
Question 4 of 5
Plasma proteins constitute what percent of the plasma volume?
Correct Answer: B
Rationale: Plasma proteins (albumin, globulins, fibrinogen) are ~7-9% of plasma volume; water is ~91-93%, and solutes (e.g., electrolytes) make up the rest. Higher percentages reflect whole blood or other components.
Question 5 of 5
This sets glomerular capillary pressure apart from other capillaries found in the body
Correct Answer: B
Rationale: Glomerular capillary pressure is higher (~55 mmHg) than in systemic capillaries (~25 mmHg) due to the afferent arteriole’s larger diameter and efferent arteriole’s resistance, enhancing filtration for urine formation. Lower pressure (A) is typical elsewhere.