Which of the following statements are true of the nervous regulation of heart rate (Select all that apply)?
A)The cardiac centers are in the medulla of the brain.
B)Only the sympathetic nervous system has nerves to the heart muscle.
C)Heart rate changes in response to changes in blood pressure or blood gas levels.
D)Sympathetic nerve fibers to the heart are part of the vagus nerves.
E)The neurotransmitter norepinephrine decreases heart rate.f.The heart generates its own beat,but the neurotransmitter acetylcholine can increase the rate.

Question

Quizplus · Accepted Answer

Option A is true as the primary cardiac centers are located in the medulla oblongata of the brainstem. 
Option C is true as the heart rate is regulated by various factors, including blood pressure and blood gas levels. 
Option B is false because both the sympathetic and parasympathetic nervous systems have nerves to the heart. 
Option D is false, and sympathetic nerve fibers to the heart arise from the sympathetic ganglia. 
Option E is false because norepinephrine increases heart rate. 
Option F is partially true because while the heart generates its own beat, acetylcholine released by the parasympathetic nervous system can decrease heart rate.

Which of the Following Statements Are True of the Nervous