Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Exercise Metabolism > Skeletal Muscle Energy Metabolism During Exercise W3 > Flashcards

Skeletal Muscle Energy Metabolism During Exercise W3 Flashcards

1
Q

What pumps control membrane excitability?

A

Na+ ATPase
K+ ATPase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

What pumps control sarcoplasmic reticulum calcium handling?

A

Ca2+ ATPase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What pumps control myofilament cross-bridge cycling?

A

Myosin ATPase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What type of oxidation has a higher power output?

A

CHO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Where is fat oxidation maximal rate?

A

60-65%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What results in metabolic acidosis during intense exercise?

A

Increased ATP utilisation
Increased glycolysis
Strong ion fluxes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What type of muscle fibre does muscle PCr and glycogen decrease greater in during intense exercise?

A

Type II

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What the major intramuscular and extra muscular substrates are during moderate exercise?

A

Glycogen
Blood glucose (liver glycogenolysis/ gluconeogenesis)
Fatty acids from muscle. triglycerides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What catalyses the PCr reaction?

A

Creatine Phosphokinase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What activates phosphorylase kinase?

A

Cellular Ca2+
Near by substrates and products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does Cellular Ca2+ do?

A

Activates phosphorylase kinase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is phosphorylase kinase?

A

Activates glycogen phosphorylase to release glycogen 1-phosphate from glycogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What activates phosphorylase A?

A

Increase in ADP and AMP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does Creatine Phosphokinase do?

A

Conversion of ATP and Creatine to PCr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does Phosphorylase A do?

A

Breaks down glycogen
Combines Pi to Glucose-1-phosphate, Glucose-6-phosphate and fructose 6-phosphate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is enzyme phosphofructokinase?

A

Regulatory enzyme

16
Q

What activates the enzyme phosphofructokinase?

A

Increase in allosteric regulators AMP/ADP/pi

17
Q

What is AMPK?

A

Sensory of muscle energy change
Glycogen levels
Muscle Glucose uptake
Fat oxidation

18
Q

What does AMPK mediate change in?

A

GLUT 4 expression
Mitochondrial biogenesis

19
Q

What increases the form of PDH into its active form?

A

Exercise regulators Ca2+
Pyruvate

20
Q

If pyruvate, CoA and NAD+ are present, flux can occur even when there is an increase in what?

A

Acetyl-CoA
NADH

21
Q

What keeps PDH inactive?

A

Resting levels of:
Acetyl-CoA
NADH

22
Q

What differences is their in metabolism between sexes?

A

Haemoglobin Concentrations
Muscle Mass
Reproductive Hormone

23
Q

What similarities is their in metabolism between sexes?

A

Fat oxidation
Fibre-type composition
Muscle Enzyme Activity

24
Q

What do females have a higher proportion in?

A

Type I fibres
Lower Maximal capacity of glycolytic enzymes
Greater reliance on IMTG during exercise

Exercise Metabolism (36 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions