atp production

Question 1

When the body creates energy in rest conditions…

Answer 1

• sufficient oxygen available
• demand for energy is low
• all energy produced aerobically bc body has abundant energy supply

Question 2

When the body creates energy in active conditions…

Answer 2

• insufficient oxygen to function at level
• without marked increase in o2 intake either during or after the effort
• occur during anaerobic and aerobic

Question 3

rest is when

Answer 3

the body is not under physical stress and when breathing and heart rates are at resting levels- low and stable

Question 4

source of atp in the state of rest

Answer 4

• 2/3 of ATP comes from breakdown of fats and 1/3 from breakdown of glucose and glycogen stores in both muscle and liver

Question 4

the mitochondria is

Answer 4

the center for aerobic energy metabolism

Question 5

the production of atp from both fats glucose and glycogen occurs…

Answer 5

in the mitochondria

Question 6

exercising is….

Answer 6

any physical state more exertive than rest

Question 7

which 3 energy systems do the body use to generate ATP?

Answer 7

ATP-PC (phosphogen) system- metabolism of phosphocreatine without o2
lactic acid (anaerobic glycolytic)- incomplete metabolism of glucose to lactic acid that does not require oxygen
aerobic system- complete metabolism of glucose, fats and proteins aerobically

Question 8

Phosphate energy system

Answer 8

PCr splits, allowing its Pi to join with ADP to quickly synthesize more ATP.
- occurs until PCr stores are depleted, in appx 8-10 sec, slightly longer for athletes

Question 9

Phosphate energy system formula

Answer 9

PCr-> Pi + Cr
Pi+ ADP= ATP

Question 10

When does the phosphate energy system provide the bulk of ATP?

Answer 10

The phosphate energy system provides the bulk of ATP during powerful or explosive efforts.
- may be one off, e.g. takeoff in the high jump, or ongoingL sprint to position in netball or football

Question 11

advantage and disadvantage of the atp-cp system

Answer 11

• can resynthesise ATP without the presence of o2
• ## at a fast rate
• amount of atp molecules resynthesised is very small
• deplete quickly

Question 12

How long does it take for the atp-pc system to deplete and what happens after that?

Answer 12

• 10 sec of maximal effort
• body needs to significantly reduce the activity’s intensity
• anaerobic glycolysis system begin to become the dominant provider of atp

Question 13

the phosphate energy system relies on muscle stores of….

Answer 13

both atp and phosphocreatine
- both have high energy bonds

Question 14

how long does the body take to restore the phosphate energy system?

Answer 14

following a 10 sec maximal effort the body can take around 3-5 minutes to restore atp and phosphocreatine supplies to pre-exercise levels fully
- takes less time to recover if lower effort was used (less than 10 seconds)