1. It is also called "antagonism". The phenomenon that the effect of a substance is suppressed by another substance. For example, in tea culture medium, aluminum has antagonistic effect on manganese. The inhibition of the metabolites and the effect of one physiological process on the other physiological processes also belong to this category. For example, fatty acids in tea plants can react with glycerol to produce fat, and can also be reduced to fatty aldehydes or fatty alcohols. If the conditions of synthetic fat are greater than the conditions of reduction, they will accelerate the synthesis of fat.
2. A phenomenon of antagonism between muscles, drugs, or physiological processes. For example, the effects of insulin and glucagon on blood glucose level, the effect of parathyroid hormone and calcitonin on bone absorption, the function of extensor and flexor muscle, and the effect of vasodilator and vasoconstrictor.
3. The mutual antagonism of different reflex activities in the body. Such as flexor and extensor reflex, swallowing reflex and inhalation reflex, etc. They are antagonistic to each other. When the extensor reflex is carried out, the reflex of the flexor muscle is bound to be inhibited. Similarly, swallowing reflex and inspiratory reflex can not be carried out at the same time, one excitement and the other one is bound to inhibit. This is due to the establishment of a fixed antagonistic antagonistic relationship between the central parts of the reflex arcs.
The coexistence of the 4 and two kinds of antagonism. The antagonism between microbes or drugs. The inhibition of another microorganism, such as a microorganism, by metabolic competition, and other reasons. If two or two kinds of drugs are used simultaneously, the drug utility is weakened or disappeared. The antagonism of antibacterials can be determined by broth or agar chessboard dilution, and the inhibitory concentration index is more than 2. Insulin and glucagon are also a case of antagonism. The interpretation of antagonism in academic literature