Raystown Lake. The largest man-made lake built by the Army Corps of Engineers in Pennsylvania is Raystown Lake. It is also the second largest man-made lake in the state, at 8,000 acres. In Huntingdon County, Pennsylvania Raystown Lake is part of a 29,000-acre project that serves as a home for recreation in the area. The area is popular for fishing, hunting, hiking, swimming and boating.
Protein characteristic of the postsynaptic membrane. In a chemical synapse, the postsynaptic membrane is the membrane that receives a signal (binds neurotransmitter) from the presynaptic cell and responds via depolarisation or hyperpolarisation. The postsynaptic membrane is separated from the presynaptic membrane by the synaptic cleft.
2) Synaptic Cleft: This is the narrow gap between the axon terminal of the presynaptic neuron, and the post-synaptic membrane of another excitable cell. It is filled with extracellular fluid. 3) Postsynaptic membrane: The membrane across the synaptic cleft is called the postsynaptic membrane.) A nerve impulse reaches the axon terminal of a presynaptic neuron; the membrane is depolarised by an action potential. 2) Depolarisation of the axon terminal during the action potential causes voltage sensitive calcium ion channels to open in the terminal knob.