AP PSYCHOLOGY

Detailed explanation-1: -A neuron sending a signal (i.e., a presynaptic neuron) releases a chemical called a neurotransmitter, which binds to a receptor on the surface of the receiving (i.e., postsynaptic) neuron. Neurotransmitters are released from presynaptic terminals, which may branch to communicate with several postsynaptic neurons.

Detailed explanation-2: -The messages carried by neurons are called nerve impulses. Nerve impulses can travel very quickly because they are electrical impulses. Neurons are usually classified based on the role they play in the body. Two main types of neurons are sensory neurons and motor neurons.

Detailed explanation-3: -The correct option is C. Nerve impulse. ∙ Nerve impulses are simply signals that are transmitted along nerve fibres (or neurons). It is the process by which neurons communicate with one another.

Detailed explanation-4: -Although the nervous system is very complex, there are only two main types of cells in nerve tissue. The actual nerve cell is the neuron. It is the “conducting” cell that transmits impulses and the structural unit of the nervous system. The other type of cell is neuroglia, or glial, cell.