Question

QUESTION 34 15 points Save Ar Please fill in the following chart. (Answer as A = increase, decrease, etc., B = ...., etc. for all the red letters) Then please describe what is happening to cardiac output during prolonged exercise and why this is happening. Increasing Workload Submaximal Exercise Prolonged Endurance Exercise Oxygen Consumption 1 then --> 1 then --> HR G Blood Catecholamines C SV 1 then --> 1 then --> 1 then --> SBP DBP TTTT Paragraph A Arial A311201) A , T ,

Answer 1

HR= Heart rate (beats/min)

SV= Stroke volume

Q= Oxygen consumption

SBP= Systolic blood pressure

DBP= Diastolic blood pressure

Oxygen consumption- The consumption of oxygen increases to several folds during physical exercise.

Blood catecolamines- Catecholamines such as epinephrine, norepinephrine and dopamine are released into the blood during physical stress.

Increasing workload- increases physical activity which needs more oxygen. Further the activity of heart increases in order to pump oxygenated blood. As stated above the blood catecholamines increases during increased physical activity that helps in reducing the bronchospasm. The increased work load increases SBP and DBP.

Submaximal exercise- can be explained as exercise done less than the maximal exercise that can be performed by the individual.

Prolonged endurance exercise- includes the exercise that increases person’s strength. Similar to increasing work load, prolonged endurance exercise also increases the oxygen demand, heart rate and stroke volume.