what are 5 instant cardiovascular responses once aerobic exercise has started

Hello Aimee Paterson,
The acute responses to aerobic exercise are what may seem obvious to you:
the need for more oxygen, heart rate increases and stroke volume increases which increases the cardiac output, respiratory ventilation increases and the blood pressure changes… usually increasing.
I hope this assists you.
Take care,
Natalie aka NAPS 2 B Fit.