Biology

Cardiovascular and Nervous System

983 Questions

Review the human cardiovascular system through these competitive exam practice questions. Key areas include heart valves, cardiac impulse pathways, and blood pressure regulation. A solid grasp of these fundamentals is crucial for science sections.

Heart anatomy and valvesCardiac impulse conductionBlood pressure mechanicsHeartbeat regulation

Cardiovascular and Nervous System Questions

Multiple choice

What is the recommended dose of epinephrine in a neonate with bradycardia?

  1. 0.01 mg/kg

  2. 0.03 mg/kg

  3. 0.1 mg/kg

  4. 0.3 mg/kg
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The recommended dose of epinephrine in a neonate with bradycardia is 0.1 mg/kg.

Multiple choice

When should atropine be given in a neonate with bradycardia?

  1. If the heart rate is less than 60 bpm after 30 seconds of chest compressions and epinephrine

  2. If the heart rate is less than 80 bpm after 30 seconds of chest compressions and epinephrine

  3. If the heart rate is less than 100 bpm after 30 seconds of chest compressions and epinephrine

  4. If the heart rate is less than 120 bpm after 30 seconds of chest compressions and epinephrine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Atropine should be given in a neonate with bradycardia if the heart rate is less than 60 bpm after 30 seconds of chest compressions and epinephrine.

Multiple choice

What is the recommended dose of atropine in a neonate with bradycardia?

  1. 0.01 mg/kg

  2. 0.03 mg/kg

  3. 0.1 mg/kg

  4. 0.3 mg/kg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The recommended dose of atropine in a neonate with bradycardia is 0.03 mg/kg.

Multiple choice

What is the primary diagnostic tool used to detect abnormalities in the heart's electrical activity?

  1. Electroencephalogram (EEG)

  2. Electromyography (EMG)

  3. Electrocardiogram (ECG)

  4. Echocardiogram
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electrocardiogram (ECG) is the primary diagnostic tool used to detect abnormalities in the heart's electrical activity.

Multiple choice

Which type of medical device is used to monitor heart rate and rhythm?

  1. Pacemaker

  2. Implantable cardioverter-defibrillator (ICD)

  3. Electrocardiogram (ECG)

  4. Holter monitor
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An electrocardiogram (ECG) is a medical device used to monitor heart rate and rhythm by recording the electrical activity of the heart.

Multiple choice

Which of the following is the largest chamber of the heart?

  1. Left Atrium

  2. Right Atrium

  3. Left Ventricle

  4. Right Ventricle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The left ventricle is the largest chamber of the heart and is responsible for pumping oxygenated blood to the body.

Multiple choice

How many valves are present in the heart?

  1. 2

  2. 3

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There are four valves in the heart: the tricuspid valve, pulmonary valve, mitral valve, and aortic valve.

Multiple choice

What is the function of the mitral valve?

  1. Prevents blood from flowing back into the left atrium

  2. Prevents blood from flowing back into the right atrium

  3. Prevents blood from flowing back into the left ventricle

  4. Prevents blood from flowing back into the right ventricle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The mitral valve prevents blood from flowing back into the left atrium during ventricular contraction.

Multiple choice

What is the term for the phase of the cardiac cycle when the heart muscle relaxes and fills with blood?

  1. Systole

  2. Diastole

  3. Atrial Contraction

  4. Ventricular Contraction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diastole is the phase of the cardiac cycle when the heart muscle relaxes and fills with blood.

Multiple choice

Which of the following is responsible for initiating the electrical impulse that causes the heart to contract?

  1. Sinoatrial Node (SA Node)

  2. Atrioventricular Node (AV Node)

  3. Bundle of His

  4. Purkinje Fibers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sinoatrial node (SA Node) is responsible for initiating the electrical impulse that causes the heart to contract.

Multiple choice

What is the term for the abnormal heart rhythm characterized by rapid, irregular heartbeats?

  1. Bradycardia

  2. Tachycardia

  3. Arrhythmia

  4. Fibrillation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Arrhythmia is the term for the abnormal heart rhythm characterized by rapid, irregular heartbeats.

Multiple choice

Which of the following is a condition in which the heart muscle becomes enlarged and weakened?

  1. Cardiomyopathy

  2. Heart Attack

  3. Heart Failure

  4. Stroke
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cardiomyopathy is a condition in which the heart muscle becomes enlarged and weakened.

Multiple choice

What is the term for the condition in which the heart fails to pump blood effectively?

  1. Cardiomyopathy

  2. Heart Attack

  3. Heart Failure

  4. Stroke
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heart failure is the condition in which the heart fails to pump blood effectively.

Multiple choice

Which of the following is a device that is implanted in the heart to regulate its rhythm?

  1. Coronary Artery Bypass Grafting (CABG)

  2. Percutaneous Coronary Intervention (PCI)

  3. Heart Transplant

  4. Pacemaker Implantation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pacemaker implantation is the procedure in which a device is implanted in the heart to regulate its rhythm.

Multiple choice

What is the term for the condition in which the heart muscle is deprived of oxygen?

  1. Heart Attack

  2. Stroke

  3. Arrhythmia

  4. Cardiomyopathy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heart attack is the condition in which the heart muscle is deprived of oxygen.