this is the ability of cardiac cells to respond to an impulse by transmitting the impulse along cell membranes
Logo

Nursing Elites

ATI RN

Cardiovascular System Practice Exam

1. What is the ability of cardiac cells to respond to an impulse by transmitting the impulse along cell membranes?

Correct answer: C

Rationale: The correct answer is C, Conductivity. Conductivity refers to the ability of cardiac cells to transmit impulses along cell membranes. Contractility (Choice A) is the ability of cardiac cells to contract in response to an electrical stimulus, not transmit impulses. Automaticity (Choice B) is the ability of cardiac cells to spontaneously generate electrical impulses. Rhythmicity (Choice D) refers to the regular generation of electrical impulses by the heart's pacemaker cells, not the transmission of impulses along cell membranes.

2. What test measures the pressure inside the arteries as the heart pumps blood?

Correct answer: A

Rationale: The correct answer is A) Blood pressure test. A blood pressure test is specifically designed to measure the pressure inside the arteries as the heart pumps blood. This test is crucial in providing information about cardiovascular health by determining the force of blood against the artery walls. Choice B, Pulse oximetry, measures oxygen saturation in the blood, not blood pressure. Choice C, Echocardiogram, is an ultrasound test that evaluates the structure and function of the heart, not specifically blood pressure. Choice D, Spirometry, is a test used to assess lung function, not blood pressure.

3. Which term refers to the relaxation phase of the heart, during which the chambers fill with blood?

Correct answer: A

Rationale: The correct answer is A, Diastole. Diastole is the phase of the cardiac cycle when the heart muscles relax, allowing the chambers to fill with blood. Choice B, Systole, is incorrect as systole is the contraction phase of the heart when blood is pumped out of the chambers. Choice C, Refractoriness, refers to a period during which the heart muscle is unresponsive to stimuli. Choice D, Automaticity, relates to the heart's ability to generate its own electrical impulses.

4. For what reason might the nurse be given an order to administer milrinone (Primacor)?

Correct answer: A

Rationale: Milrinone is commonly prescribed for congestive heart failure to help improve cardiac function and alleviate symptoms. Choices B, C, and D are incorrect as milrinone is not typically used for hypertension, cardiac arrhythmias, or bradycardia. It is specifically indicated for congestive heart failure for short-term management.

5. Which term conceptualizes that the greater the myocardial fiber stretch, within physiologic limits, the more forceful the ventricular contraction, thereby increasing stroke volume?

Correct answer: A

Rationale: The correct answer is A, Frank-Starling’s Law. This law explains that within physiologic limits, the greater the stretch of myocardial fibers, the more forceful the ventricular contraction, leading to an increased stroke volume. Choice B, Automaticity, refers to the ability of cardiac cells to spontaneously generate electrical impulses. Choice C, Contractility, represents the intrinsic ability of the heart muscle to contract. Choice D, Excitability, refers to the ability of cardiac cells to respond to electrical stimuli.

Similar Questions

What is a type of heart disease that involves the thickening or stiffening of the heart muscle, reducing its ability to pump blood?
The client asks about side effects of taking digoxin. How does the nurse respond?
What is a condition where a blood clot forms in a deep vein, usually in the legs, and can lead to serious complications if it travels to the lungs?
The nurse is caring for a client with atrial fibrillation on dabigatran (Pradaxa). What is the most important instruction to give to the client?
What is a condition where the airways become swollen and produce extra mucus, making it difficult to breathe, often associated with COPD?

Access More Features

ATI RN Basic
$69.99/ 30 days

  • 5,000 Questions with answers
  • All ATI courses Coverage
  • 30 days access

ATI RN Premium
$149.99/ 90 days

  • 5,000 Questions with answers
  • All ATI courses Coverage
  • 30 days access

Other Courses