In a healthy adult mammal, where is the normal cardiac pacemaker located?
Correct answer: D. Sinoatrial node
- A. Atrioventricular node
- B. Bundle of His
- C. Purkinje fibres
- D. Sinoatrial node
Explanation
The sinoatrial node normally generates the fastest spontaneous electrical impulses and initiates each heartbeat. The other structures conduct or distribute the impulse after it begins.
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Covers the gross and microscopic structure of domestic animals, including bones, joints, muscles, organs, blood vessels and nerves. It explains how the respiratory, cardiovascular, digestive, urinary, nervous, endocrine and reproductive systems function, with attention to species differences and the relationship between anatomical structure and physiological processes.
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