For some, payment ends with the death of the annuitant, but others provide for payment to a spouse or other beneficiary for years afterward. The fixed-period, or period-certain, annuity guarantees payments to the annuitant for a predetermined length of time.
Medulla Oblongota. 1  The part of the brain that regulates basic functions like heart rate, blood pressure, breathing, coughing, sneezing. 2  The part of the brain where the optic nerves cross., the point at which the optic nerves from the inside half of each eye cross over and then project to the opposite half of the brain.
The chemoreceptor trigger zone (CTZ) is an area of the medulla oblongata that receives inputs from blood-borne drugs or hormones, and communicates with other structures in the vomiting center to initiate vomiting.his is because the medulla oblongata is located in the area of the brain, the most inferior portion, which does not have a robust and highly developed blood-brain barrier. Without this barrier, emetic drugs and toxins are free to interact with a receptor (biochemistry) , or multiple receptors located in the CTZ.