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.
Excitability is thus described in terms of the qualitatively different transitions neurons exhibit as they go from resting to spiking states. Underlying a neuronâs excitability is a host of ion channels that allow sodium, potassium, calcium, etc. to go in and out of the cell.There is a relationship between the types of rest-to-spiking transitions neurons can make and the type and number of ion channels they express (see for example pdf).Working in model systems like Drosophila, we can change the levels of channel expression in neurons and see how their excitability changes.urthermore, we can target these manipulations to groups of cells, like motor neurons, to ask how changing their excitability affects motor behaviors. Below is an example of a genetic manipulation of potassium currents in Drosophila motor neurons (article available here) that Iâve used in my work (unpublished to date).