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.
X â a combination of hazardous materials and tank endorsements; What steps do you take to get a CDL Hazmat endorsement? Getting a CDL Hazmat endorsement requires dealing both with the state government that issued your commercial driverâs license and the federal government. The state administers the test that will qualify you to drive Hazmat.