ch2:energy and energy concepts Flashcards
1
Q
what is energy
A
work capacity (mechanical energy)
2
Q
types of energy
A
mechanical
chemical
heat (calorie)
3
Q
what is energy expenditure
A
energy/time
4
Q
what type of energy is a calorie
A
heat
5
Q
what is a calorie
A
energy needed to raise the temp of 1g water 1deg C
6
Q
what is a joule
A
energy required to move a mass of 1g at a velocity of 1m/s
7
Q
cal to joule
A
1 cal = 4.186J (4.2)
8
Q
energy efficiency in humans
A
20% of all energy produced is for mvt/work
rest 80% is to maintain homeostasis
9
Q
3 systems that regenerate ATP for exercise
A
- creatine phosphate
- anaerobic glycolysis
- oxidative phosphorylation
10
Q
compared to robots are humans more efficient at converting energy for mechanical mvt
A
humans are less efficient
