Endocrine glands usually have ducts. The action of hormones is dependent upon gland cells. Endocrine glands produce chemicals that exert their effects outside the body of the animal producing them. Neurohormones are hormones that affect nerve cells. Peptide hormones may enter cells more easily.
Animals regulate hormone release through positive feedback.
An increase in antidiuretichormone will decrease blood press u re. 35. The a nterior pituitary is more like part of the brain than an endocrine gland. The breakdown of glycogen into glucose is favored by the presence of insuli n 38. Insulin increases blood glucose. Adrenalin and noradrenalin stimulate the parasympathetic nervous system.