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.
How to get hazmat endorsement. 1  You must have a valid CDL in good standing in the state youâre applying in. 2  Able to provide proof of your full legal name. 3  Furnish proof of your U.S. citizenship. 4  Able to prove your date of birth and identity. 5  Proof of social security number. 6  Provide a valid DOT medical card.