Question

current attempt in progress
which statement is not true about the sympathetic nerves to the heart?
o they release norepinephrine that binds to β₁ receptors
o they promote ca⁺² inflow, causing a positive inotropic effect
o they increase both heart rate and force of contraction
o they contain sympathetic preganglionic fibers
o all of these choices statements are true

Explanation:

The sympathetic nerves to the heart release norepinephrine which binds to β₁ - receptors. This promotes Ca²⁺ inflow leading to a positive inotropic effect and increases both heart rate and force of contraction. Sympathetic nerves to the heart contain post - ganglionic fibers, not pre - ganglionic fibers.

Answer:

they contain sympathetic preganglionic fibers