The medulla oblongata is the lower portion of the brainstem. It deals with autonomic functions. The cardiac center is the part of the medulla oblongata responsible for controlling the heart rate.
HazMat Endorsement Requirements. Below is what you can expect when applying for a Class H endorsement: You must have a valid commercial drivers license (CDL) for the state in which youâre applying. It must be valid (not currently suspended or revoked) and not checkered with serious road violations.
After completing all required road/skills tests, you may choose to receive a CDL without the HME for use until the TSA approval is received. However, once TSA approval is received, you will need to return to the MVD CDL office and apply for the HazMat-endorsed CDL. Because the endorsement fee was already paid, there will be no additional fee charged when exchanging a CDL issued in the interim, for the CDL reflecting the HME.