Cardiac muscle normally has what kind of oxygen-using metabolism?

Cardiac muscle normally has what kind of oxygen-using metabolism?

  • Correct Answer: aerobic
  • anarobic
  • digestive
  • glucose

Explanation: Cardiac Muscle Metabolism Normally, cardiac muscle metabolism is entirely aerobic. Oxygen from the lungs is brought to the heart, and every other organ, attached to the hemoglobin molecules within the erythrocytes. Heart cells also store appreciable amounts of oxygen in myoglobin. Normally, these two mechanisms, circulating oxygen and oxygen attached to myoglobin, can supply sufficient oxygen to the heart, even during peak performance. Fatty acids and glucose from the circulation are broken down within the mitochondria to release energy in the form of ATP. Both fatty acid droplets and glycogen are stored within the sarcoplasm and provide additional nutrient supply. (Seek additional content for more detail about metabolism.

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