Regulation of Cardiac Output

Question 1

Sluggish fish have ____ resting Q than active fish

Answer 1

• lower

Question 2

What muscle is used for burst swimming? Does it use O2?

Answer 2

• white (anaerobic)
• no

Question 3

in burst swimming, what is the state of Q, F(h) and arterial pressure?

Answer 3

• lowered

Question 4

What does burst swimming cause?

Answer 4

• oxygen debt to get rid of lactate (requires O2)

Question 5

What state are Q, F(h) and arterial pressure during burst swimming recovery?

Answer 5

• increased

Question 6

What muscle is used for endurance swimming? Does it use Oxygen?

Answer 6

• red (aerobic)
• needs O2

Question 7

How much greater is Q during endurance swimming?

Answer 7

• 50-200%

Question 8

How much greater is SV(h) during endurance swimming?

Answer 8

• 25-200%

Question 9

How much greater is F(h) during endurance swimming?

Answer 9

• 7-50%

Question 10

Why are Q, SV(h) and F(h) so much greater during endurance swimming?

Answer 10

• higher need for O2 delivery to muscle

Question 11

Q ____ with temp

Answer 11

• increases

Question 12

What does Q10 mean?

Answer 12

• increase with 10 degree C temp change

Question 13

Why does Q increase w temp?

Answer 13

• O2 consumption (Mo2) increases

Question 14

Q10 increases ____ to ____x with temp

Answer 14

• 1.6 to 2.4X

Question 15

During moderate hypoxia, what happens to Q?

Answer 15

• maintained

Question 16

Moderate hypoxia is ___ critical Po2

Answer 16

• above

Question 17

During severe hypoxia, what happens to F(h)?

Answer 17

• lowers (heart rate)

Question 18

Severe hypoxia is ___ critical Po2

Answer 18

• below

Question 19

Cardiac muscle is very O2 _____.

Answer 19

• dependent (aerobic)

Question 20

Decrease in O2 = ___ in performance

Answer 20

• lowered