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.
All new and renewal HazMat endorsement applicants are required to complete the required Hazardous Materials Endorsement Application and fingerprint collection process through the Transportation Security Administration (TSA) data collection vendor and be approved by TSA prior to issuance of a CDL with a HazMat endorsement.