cardiac response to exercise Flashcards
1
Q
A
2
Q
What is sympathetic discharge
A
- from medulla oblongata at the onset of exercise
- stimulates the heart + BV
- vasoconstricts all others
- diverting more blood to the muscles required in exercise
3
Q
Increased SV
A
- increased venous return, more stretch to the heart chambers = stronger contraction (Frank-Starling curve)
- plus sympathetic discharge increases HE and strength of contraction),
4
Q
increased heart rate
A
- influenced by SV
- Effect of training on Heart and CO due to the heart chambers and heart mass increases
- Mostly in endurance type athletic training
- As SV increases, at rest HR is lower.
