A buying hedge is also called a long hedge. Buying hedge means buying a futures contract to hedge a cash position. Dealers, consumers, fabricators, etc, who have taken or intend to take an exposure in the physical market and want to lock-in prices, use the buying hedge strategy. buying hedge is also called a long hedge. Buying hedge means buying a futures contract to hedge a cash position. Dealers, consumers, fabricators, etc, who have taken or intend to take an exposure in the physical market and want to lock-in prices, use the buying hedge strategy.
An excitatory synapse is a synapse in which an action potential in a presynaptic neuron increases the probability of an action potential occurring in a postsynaptic cell. Neurons form networks through which nerve impulses travel, each neuron often making numerous connections with other cells.
At symmetric synapses the synaptic cleft is narrower than at excitatory synapses, and the postsynaptic density is only about the same width as the presynaptic density. The postsynaptic elements at such synapses include dendritic shafts (Fig. 9.2A and Fig. 9.4) some dendritic spines (Fig.