Chapter 4 Flashcards
(17 cards)
As the exercise intensity increases above the crossover point, a progressive shift occurs from _______________________ metabolism.
Fat to carbs.
The more widely adopted term for the sudden rise in lactate levels in the blood is the ____________________________, which was known as anaerobic threshold previously.
Lactate threshold
What are the reasons that Excess post-exercise oxygen consumption (EPOC) is greater during high-intensity exercise when compared to moderate-intensity exercise.
- higher blood lactate levels
- phosphocreatine (PC) is depleted to greater extent.
Continuous exercise at a high relative work rate greater than ____________ results in a slow rise in oxygen uptake across time. Therefore, a steady state cannot be maintained during such an exercise.
75% VO2max
The term________________________ applies to the lag in oxygen uptake at the beginning of exercise.
Oxygen deficit
Oxygen deficit can be specifically defined as the difference between ___________ in the first few minutes of exercise and an equal time period after steady state has been obtained.
Oxygen uptake
A noninvasive technique to estimate the percent contribution of carbs or fat to energy metabolism during and exercise is the ____________________
Which is defined as the ratio of carbon dioxide output (VCO2) to the volume of oxygen consumed (VO2)
Respiratory exchange ratio
The process of glucose synthesis from non-carbohydrate sources is know as __________________________.
Gluconeogensis
___________= recruited during intense, rapid exercise
__________= recruited primarily during low-intensity activity.
Fast fibers
Slow fibers
During a high-intensity, short term exercise , which lasts 2 to 20 seconds, the muscles ATP production is dominated by the _______________________.
ATP-PC system
__________________ glycogen stores mainly serve as a means of replacing blood glucose levels.
Liver
Which of the following hormones stimulate lipase activity?
- Norepinephrine
- Epinephrine
- Glucagon
The maximal capacity to transport and utilize oxygen during exercise is known as _________________________________(vo2max)
Maximal oxygen uptake
The _________ phase of oxygen debt, which lasts approximately two-three minutes, immediately follows an exercise.
Rapid
A contributing factor to excess post-exercise oxygen consumption ((EPOC) is that _______________ remain elevated above resting levels for several minutes following exercise, which requires additional o2.
Breathing and heart rate
In the live, the amino acid _________________ can be converted to glucose and returned via the blood to skeletal muscle to utilized as a substrate for producing energy.
Alamine
Respiratory exchange ratio Values -
Fat oxidation =
Carbs. Oxidation =
Fat-0.7
Car- 1
