Question

multiple select question
select all that apply
what branches of the nervous system innervate the sa node, influencing heart rate?
the enteric branch
the parasympathetic branch
the somatic branch
the sympathetic branch

Explanation:

The SA (sino - atrial) node is innervated by the autonomic nervous system. The autonomic nervous system has two main branches: the sympathetic and parasympathetic branches which influence heart rate. The enteric branch is mainly involved in the digestive system and the somatic branch is related to voluntary muscle control and not involved in innervating the SA node.

Answer:

B. The parasympathetic branch, D. The sympathetic branch