Exercise Physiology Flashcards Preview

ACBSP > Exercise Physiology > Flashcards

Flashcards in Exercise Physiology Deck (32):
1

Which energy system uses stored phosphagens as the substrate?

ATP-PCr energy system

2

Which substrate does the ATP-PCr energy system use?

Stored Phosphagens

3

Which energy system uses glycogen and glucose, but not fats or proteins, as the substrate?

Glycolytic energy system

4

Which energy system uses glycogen, glucose, fats, and proteins as the substrate?

Aerobic Metabolic energy system

5

Which substrate does the Glycolytic energy system use?

Glycogen and Glucose, not fats or proteins

6

Which substrate does the Aerobic Metabolic energy system use?

Glycogen, Glucose, Fats, and Proteins

7

How is phosphate bond energy aquired?

ATP -> ADP + P + Energy

8

How does the PCr energy system create ATP?

PCr + ADP -> Cr + ATP

9

What is the Adenylate kinase reaction?

2ADP -> 1 ATP + 1 AMP

10

Definition:
What is Biological Burning?

Definition:
The removal of electrons from hydrogen (oxidation), passed to oxygen (reduction)

11

Definition:
Electron Transport

Definition:
Catalysis by dehydrogenase enzymes
NAD, FAD

12

Definition:
Oxidative Phosphorylation

Definition:
The transfer of electrons from NADH2 and FADH2 to Oxygen

13

What are the three primary antioxidant systems?

Superoxide Dismutase (SOD)
Catalase
Glutathione Peroxidase (GPx)

14

What does Superoxide Dismutase do?

Dismutation of Superoxide (ROS) to H2O2 and oxygen

15

What does Catalase do?

Converts H2O2 to water and oxygen

16

What does GPx do?

Uses reduced glutathione to reduce H2O2 to oxidized glutathione and water

17

What is the enzymatic pathway for detoxification of ROS?

ROS + H2O -> (SOD) -> H2O2 + O2
H2O2 -> (Catalase & GPx) -> H20 + O2

18

How are free radicals produced?

2-5% of all oxygen consumed in the mitochondria forms free radicals

19

What are the three steps of energy transfer and exercise?

Glycolysis
Lactic Acid System
Recovery from Exercise

20

What is the rate limiting step of glycolysis?

Conversion of F6P to F-1,6-BiP, catalyzed by PFK

21

Definition:
Blood Lactate Threshold

Definition:
Highest Oxygen Consumption with less than 1.0mM/L increase in Blood Lactate Accumulation

22

Definition:
Onset Blood Lactate Accumulation

Definition:
A systematic increase to 4.0mM/L

23

What is the role of Sodium Bicarbonate in athletic performance?

NaHCO3 acts as a buffer to counter acidity from Lactate accumulation

24

What is the recommended starting dose for Sodium Bicarbonate?

0.2-0.4g/kg of body weight
1-2hrs pre-exercise
in flavored water or capsules

25

Definition:
Max VO2

Definition:
The point at which oxygen consumption plateaus and shows no further increase in workload

26

What is the Max VO2 in Women?

Runners - 65
Swimmers - 56
Sedentary - 39

27

What is the Max VO2 in Men

Runners - 80
Swimmers - 75
Sedentary - 44

28

Definition:
Oxygen Deficit

Definition:
The difference between the total oxygen consumed and the total oxygen that should have been consumed if a steady rate of aerobic metabolism has been reached at the start of the exercise

29

Definition:
Oxygen Debt (EPOC)

Definition:
Oxygen consumed during the recovery that exceeds the amount of oxygen that would be consumed at resting levels.

30

Definition:
EPOC

Definition:
Excess Post-exercise Oxygen Consumption

31

What is the smallest contractile unit of the skeletal muscle?

The Sarcomere

32

Definition:
Muscle Unit

Definition:
A single alpha motor neuron and all of the muscle fibers that neuron activates