Exercise: Muscle, fuels, fatigue Flashcards Preview

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Flashcards in Exercise: Muscle, fuels, fatigue Deck (29):
1

more mitochondria in muscle good?

yes, more glucose disposal in response to insulin

2

Type1 fibres stain what colour after acidic?

dark

3

Type 2 fibres stain what colour after basic?

dark

4

MHC in muscle fiber immunoblotting stands for?

myosin heavy chain

5

which muscle fiber types have most mitochondria?

Type 1 >IIa> IIx

6

order of muscle fiber recruitment as more force needed?

Type I then IIa then IIx

7

Which fiber type has influence on DM2?

Type 2

8

Rate of muscle decline in disuse greatest when?

0-10 days

9

what is the protein synthesis and ribosome genesis molecule in the hypertrophy pathway called?

mTOR

10

what is Foxo?

involved in protein degradation pathway for muscle atrophy

11

Mitochondrial adaptation to exercise?

1. more mitochondria
2. less lactate and CHO use
3. more fat oxidation
4. more endurance
5. better insulin action

12

lactate is a biomarker used for?

seeing if there is increased mitochondrial density

13

glycolysis and creatine phosphate is what kind of ATP generation?

substrate level phosphorylation

14

What is mTOR?

the protein synthesis and ribosome genesis molecule in the hypertrophy pathway

15

molecule involved in protein degradation pathway for muscle atrophy?

Foxo

16

ATP from lipids of proteins called?

exidative phosphorylation

17

Power is?

how fast can you generate ATP?

18

Capacity is?

how long and much ATP can be generated to last?

19

what are fast sources of ATP?

Creatine phosphate
glycolysis

20

what are slower but more capacitative sources of ATP?

CHO
FFA

21

Fuels for sprinting predominantly?

Creatine Phosphate
Glycolysis

22

fuels for endurance? most to least

muscle glycogen
FFA = plasma glucose
other fat sources

23

what % intensity do you use mostly fats and glucose to maintain?

50-60%

24

female who exercises has more what oxidation?

fat oxidation

25

broad defenition of fatigue?

reduction in force and power generating capacity

26

task specific definition of fatigue?

inability to maintain required or expected force of power output

27

caffeine and amphetamines changes fatigue how?

changes perception of fatigue and pain

28

muscle feedback to brain and motivation?

metabolic feedback from muscles

29

what ingestion increases exercise capacity?

CHO ingestion