Question

increased sympathetic stimulation causes increased heart rate and stroke volume. true or false true false

Explanation:

The sympathetic nervous system is responsible for the "fight - or - flight" response. When stimulated, it releases neurotransmitters like norepinephrine. This increases heart rate by acting on the sino - atrial node (the heart's natural pacemaker). It also increases stroke volume. This is because sympathetic stimulation causes increased contractility of the heart muscle (positive inotropic effect), allowing more blood to be ejected with each beat.

Answer:

True