EPSP and IPSP potentials are local currents of ions that move along the plasma membrane toward the initial segment area of the . Graded potentials are added together in the initial segment; this process is called . The initial segment, by adding postsynaptic potentials, determines if a(n) potential is reached. This potential is mV. This is a change of mV from the RMP. When this threshold is reached, it initiates the opening of channels and the generation of a(n) potential that will travel along the axon.

Alaska and northern canada have a diet rich in vitamin d and their skin color is darker than predicted on the basis of iv intensity at their latitude. explain the observation:

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla

When is your breathing likely to speed up? a. when your white blood cells increase b. when your cells need more energy c. when your heart cells need more carbon dioxide d. when your blood cells have too much oxygen