Indicate the effects of sympathetic and parasympathetic stimulation on the heart using the following answer code:
-increases the contractility of the atrial and ventricular muscle
A)an effect caused by sympathetic stimulation
B)an effect caused by parasympathetic stimulation
C)not brought about by either sympathetic or parasympathetic stimulation

Question

Quizplus · Accepted Answer

Sympathetic stimulation increases the contractility of the atrial and ventricular muscle by increasing the rate and force of contraction. This is due to the release of the neurotransmitter norepinephrine, which binds to beta-adrenergic receptors on cardiac muscle cells. Parasympathetic stimulation, on the other hand, decreases the rate of contraction and has little effect on contractility.

Indicate the Effects of Sympathetic and Parasympathetic Stimulation on the Heart