Chapter 13, Problem 1RQ

How are EPSPs produced? IPSPs?

Assume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and presynaptic excitatory neuron B terminates on the same postsynaptic cell on a dendrite located on the side of the cell body opposite the axon hillock. Explain why rapid firing of presynaptic neuron A could bring the postsynaptic neuron to threshold through temporal summation, thus initiating an action potential, whereas firing of presynaptic neuron B at the same frequency and the same magnitude of EPSPs may not bring the postsynaptic neuron to threshold.

The nervous system senses, interprets, and issues commands for responses to _________.

In emergencies when O2 supplies are low, the brain can perform anaerobic metabolism. (True or false?)

Horners syndrome is a condition that presents with changes in one eye, such as pupillary constriction and dropping of eyelids, as well as decreased sweating in the face. Why could a tumor in the thoracic cavity have an effect on these autonomic functions?

A neuron responds to adequate stimulation with _______, a type of self-propagating signal.