A stimulus from a sensory cell or another neuron depolarizes the target neuron to its threshold potential (-55 mV), and Na channels in the axon hillock open, starting an action potential. Once the sodium channels open, the neuron completely depolarizes to a membrane potential of about +40 mV.
Lake Lyndon B. Johnson (more commonly referred to as Lake LBJ and originally named Lake Granite Shoals) is a reservoir on the Colorado River in the Texas Hill Country in the United States. The reservoir was formed in 1950 by the construction of Granite Shoals Dam by the Lower Colorado River Authority.he lake was originally called Lake Granite Shoals. The dam would be renamed Wirtz Dam in 1952 for Alvin J. Wirtz, the first general counsel of the LCRA, and the lake was renamed to Lake Lyndon B. Johnson in 1965 in honor of US President Lyndon Baines Johnson.
The Lake Beresford Yacht Club is located on the scenic shore of Lake Beresford, and connects directly to the St. Johns River. LBYC is a proud member of the Florida Council of Yacht Clubs and enjoys reciprocal agreement with its member clubs. This reciprocity allows our members to visit other member Yacht Clubs throughout the State. The Lake Beresford Yacht Club is honored to be one of the few private Clubs remaining in West Volusia County.