1. Match the decription listed with the corresponding structure A. corpus callosum B. hypothalamus C. mammillary bodies D. pineal body (gland) 1. controls hormone secretion from the pituitary gland 2. fiber tract that connects the left cerebral hemisphere to the right cerebral hemisphere 3. involved in suckling reflex and chewing 4. primary relay center for sensory information coming into the brain 5. secretes the hormone melatonin from its precursor molecule serotonin Solution Ans). A. corpus callosum - 2. fiber tract that connects the left cerebral hemisphere to the right cerebral hemisphere B. hypothalamus - 1. controls hormone secretion from the pituitary gland C. mammillary bodies - 4. primary relay center for sensory information coming into the brain D. pineal body (gland) - 5. secretes the hormone melatonin from its precursor molecule serotonin.