Heart Flashcards
1
Q
How much of the body’s total weight is the heart?
A
1%
2
Q
How much of the resting metabolic rate does the heart account for?
A
10%
3
Q
What can it oxidise for energy?
A
fatty acids and carbohydrates
TCA cycle substrates
ketone bodies
4
Q
Why is there a high energy need?
A
must beat constantly
5
Q
How is the heart designed for aerobic respiration
A
lots of mitochondria
6
Q
What happens if there is a lack of o2?
A
Cell death and myocardial infarction
