Factors Affecting O2 Consumption

Question 1

How specifically do most animals follow allometric scaling? (3)

Answer 1

• inter-species comparisons
• development within same species
• cellular level

Question 2

What is whole animal MR?

Answer 2

• MR proportional to body mass
  (increases with size)

Question 3

What is mass specific MR?

Answer 3

• inversely proportional to body mass (decreases with size)

Question 4

Whats the difference in MO2 during life stage?

Answer 4

• eggs have low MO2 (increases post hatch)
• MO2 juveniles > MO2 adult

Question 5

Why is MO2 juveniles > MO2 adult?

Answer 5

they’re growing

Question 6

What is standard MR?

Answer 6

• baseline MR

Question 7

What is specific dynamic action (SDA)?

Answer 7

• heat increment of feeding (digestion + assimilation)

Question 8

What is standard rate?

Answer 8

• SMR at rest

Question 9

What is active rate?

Answer 9

• max MR (MMR)

Question 10

How do you calculate scope for activity/aerobic scope?

Answer 10

MMR - SMR

Question 11

Higher activity = ____ MR

Answer 11

higher

Question 12

MO2 is ____ to red muscle activity. What does this mean?

Answer 12

• proportional
• if red muscle activity increases, so does MO2

Question 13

SMR ____ with temp

Answer 13

• increases

Question 14

What is Q10?

Answer 14

• change in MR for every 10 degree C increase in temp

Question 15

What is the main factor to performance in temp increase differences across species?

Answer 15

• thermotolerance/temp tolerance

Question 16

What is Pcrit?

Answer 16

• indication of hypoxia intolerance

Question 17

What does a high Pcrit mean?

Answer 17

• less hypoxia intolerance

Question 18

How do oxy-regulators maintain MO2?

Answer 18

• increase ventilation

Question 19

MO2 ____ below Pcrit

Answer 19

• reduced

Question 20

At Pcrit, MO2 ____ with PO2 ___.

Answer 20

-decrease x2

Question 21

Below Pcrit, oxy-conformers are ___. This leads to ___.

Answer 21

• unable to meet O2 demand
• death