ch4

Question 1

bioenergetics

Answer 1

study of energy in human body, how energy is transformed through various biochemical reactions

Question 2

metabolism

Answer 2

process in which nutrients are acquired, transported, used, and disposed of by the body

Question 3

exercise metabolism

Answer 3

examination of bioenergetics as it relates to the unique physiological changes and demands placed on the body during exercise

Question 4

substrates

Answer 4

material or substance on which an enzyme acts; used to transfer metabolic energy to be used for all types of cellular activity

carbs, protein, fats

Question 5

3 oxidative/aerobic systems

Answer 5

aerobic glycolysis

krebs cycle

electron transport chain

Question 6

respiratory quotient

Answer 6

amount of carbon dioxide expired divided by amount of oxygen consumed, measured during rest or at steady state exercise using a metabolic analyzer

RQ where fat used 100% as fuel = RQ 0.7
RQ carbs used 100% as fuel = RQ 1.0
0.7-1.0 = mixture of carbs and fat as fuel

Question 7

adenosine triphosphate (ATP)

Answer 7

energy storage and transfer unit within cells

leaves behind ADP

Question 8

ATP-PC

Answer 8

activity: power training, sprinting
time present: 10-15sec
recovery time: 90sec

Question 9

glycolysis

Answer 9

activity: most workouts, 8-12reps; 200-400m sprint, bodybuilding
time present for: 30-50sec

Question 10

oxidative system

Answer 10

activity: walking, distance running

time present for: 75sec-10min+

Question 11

energy system activated first regardless of activity

Answer 11

ATP-PC

Question 12

fat is used as fuel source in which type of exercise intensity

Answer 12

low

example exercise: marathon

Question 13

which energy system uses phosphocreatine?

Answer 13

ATP-PC

Question 14

phospho-creatine system

Answer 14

lasts 6-10sec

initiated by depletion of stored ATP in muscles