How do parasympathertic neural signals affect the working the heart

Options

A. Reduce both heart rate and cardiac output
B. Heart rate is increased without affecting the cardiac output
C. Both heart rate and cardiac output increase
D. Heart rate decreases but cardiac output increases

Answer

A

Explanation

Parasympathetic neural signal reduces both heart rate and cardiac output, through the post ganglionic fibres. These fibres are very short, and are cholinergic in nature.