Acute Responses To Aerobic Exercise

Question 1

Amount of blood pumped by heart in liters per minute

Answer 1

Cardiac output. Q= SV x HR

Question 2

From rest to steady stae exercise, Q..

Answer 2

Initially rapid increase then gradual then plateaus.

Question 3

Volume of blood available to be pumped by left ventricle at end of filling phase

Answer 3

EDV

Question 4

Hormones of sympathetic nervous system that produce a more forceful ventricular contraction and greater systolic emptying of the heart

Answer 4

Catecholamines

Question 5

Venous return..

Answer 5

Increases which increases EDV

Question 6

With increased volume, myocardial fibers become more stretched= more forceful contraction and increased for d of systolic ejection and increased cardiac emptying. Called..

Answer 6

Frank starling mechanism. Force of contraction is a function of the length of the fibers of the muscle wall

Question 7

Results in an increase in HR at beginning of exercise..

Answer 7

Reflex stimulation of symp nervous system

Question 8

HR and intensity..

Answer 8

Increase linearly

Question 9

Max HR estimation equation

Answer 9

220 - age = BPM +/- 10-12 BPM

Question 10

Amount of O2 consumed by body’s tissues

Answer 10

Oxygen uptake or VO2

Question 11

Greatest amount of O2 that can be used at cellular level for the entire body

Answer 11

VO2 max

Question 12

Most widely accepted measure of cardio respiratory fitness

Answer 12

VO2 max

Question 13

O2 uptake can be calculated with…

Answer 13

The fick equation. VO2 = Q x a-vo2 difference