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.
Commercial Driver License (CDL) Do I need a CDL? Find out if you need a CDL to drive your commercial vehicle. CDLs and endorsements. Learn about the different classes of CDLs, restrictions, and when you need to have an endorsement on your CDL. Getting a CDL Find out about instruction permits, self-certification, training, employer registration, agribusiness requirements, medical exams, and drug testing required to get a new CDL.