A Labor and Delivery nurse knows that four of the five fetal factors that interact to regulate the heart rate are which of the following? (Select all that apply.)

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The sympathetic and parasympathetic branches of the autonomic nervous system are balanced forces that regulate FHR.Sympathetic stimulation increases the heart rate,while parasympathetic responses,through stimulation of the vagus nerve,reduce the FHR and maintain variability.The baroreceptors stimulate the vagus nerve to slow the FHR and decrease the blood pressure.These are located in the carotid arch and major arteries.The chemoreceptors are cells that respond to changes in oxygen,carbon dioxide,and pH.They are found in the medulla oblongata and the aortic and carotid bodies.The adrenal medulla secretes epinephrine and norepinephrine in response to stress,causing an acceleration in FHR.Uterine activity is a maternal factor.

A Labor and Delivery Nurse Knows That Four of the Five