Control of the heartbeat and cardiac output Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which structure delays the wave of depolarisation before it reaches the ventricles?
- A. Sinoatrial node
- B. Atrioventricular node
- C. Bundle of His
- D. Purkyne fibres
2. An ECG shows an R–R interval of 0.80 s. What is the heart rate?
- A. 48 beats per minute
- B. 60 beats per minute
- C. 75 beats per minute
- D. 80 beats per minute
3. A patient has a stroke volume of 80 cm³ and a heart rate of 75 beats per minute. What is the cardiac output?
- A. 155 cm³ min⁻¹
- B. 600 cm³ min⁻¹
- C. 6000 cm³ min⁻¹
- D. 60 000 cm³ min⁻¹
4. Which nerve carries impulses from the cardiovascular control centre that slow the heart?
- A. Sympathetic nerve
- B. Vagus nerve
- C. Phrenic nerve
- D. Sciatic nerve
5. Which ECG feature indicates atrial fibrillation?
- A. A rate above 100 with normal waves
- B. A single early beat followed by a pause
- C. Irregular timing with no clear P waves
- D. A rate below 60 with normal waves