Final answer:
The limbic system does not directly regulate heart rate in response to fear and anxiety; this function is primarily managed by the autonomic nervous system. The correct option is E.
Step-by-step explanation:
The question asks about the limbic system and its functions. The correct choice for the function that is not performed by the limbic system is E. regulation of heart rate in response to fear and anxiety. While the limbic system is indeed involved in processing emotions such as fear and anxiety, the regulation of heart rate is primarily attributed to the autonomic nervous system rather than the limbic system itself.
This system operates largely unconsciously and manages bodily functions such as heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal. The limbic system, on the other hand, is associated with emotions, the storage and retrieval of memory, and has a role in controlling subconscious endocrine functions and the formation of memories, but not the direct regulation of heart rate.