Lactate

Question 1

Acid

Answer 1

Compound that donates H+

Question 2

Base

Answer 2

Compound that gives up OH

Question 3

Resting muscle and Blood pH

Answer 3

Muscle- 6.9-7.1
Blood- 7.4 (to regulate cellular acidity)

Question 4

Formula for lactate

Answer 4

C3H5O3
- does not diffuse into blood for buffering
Cannot give up H+

Question 5

Does Lactate cause muscle acidosis?

Answer 5

NO
- Actually does the opposite as it consumes an H+
NADH H+ ↓ NAD+

Question 6

Lactate Shuttle

Answer 6

MCT1 shuttle
- Lactate can be transported between muscles or organs to be used as fuel)

Question 7

Where does lactate go?

Answer 7

1) TO muscles, tissues
2) Excreted through sweat and urination
3) TO liver to be converted into glucose

Question 8

Blood lactate levels correlate to?

Answer 8

H+ levels
Acidification of blood and muscles

Question 9

Blood lactate threshold

Answer 9

The point of %VO2 (exercise intensity) that lactate increases rapidly
50% in untrained
75% in trained

Question 10

Where does H+ come from in anaerobic exercise

Answer 10

1) Intermediary steps of glycolysis
2) Hydrolysis of ATP

Question 11

How does high intensity exercise affect pH

Answer 11

An increase in H+ and decrease in pH
Muscle- lowest recorded was 6.4
Blood- around 7

Question 12

A decrease in pH relates to

Answer 12

A decrease in muscular force production

Question 13

Buffering capacity

Answer 13

Ability to resist change in muscle pH
Highest in sprinters
Lower in marathon runners (do not reach lactate threshold)