Chapter 11 Part 9 (multiple choice) Flashcards Preview
Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating An inhibitory postsynaptic potential (IPSP) is associated with ____. Which of the following describes the nervous system integrative function?.the and palace of fine arts museum
What part of the nervous system performs information processing and integration? Which of the following is NOT one of the basic functions of the nervous system? Which of the following allows us to consciously control our skeletal muscles? Cold sores on the skin of the mouth occur when herpes simplex viruses that are dormant in neural ganglia become active and travel to the skin of the mouth. Which of the following is the mechanism by which these viruses travel from the ganglia located within the head to the skin of the mouth?
Shared Flashcard Set. Description Test 4. Total Cards Subject Biology. Level Undergraduate 1.
NCBI Bookshelf. Sunderland MA : Sinauer Associates; Postsynaptic conductance changes and the potential changes that accompany them alter the probability that an action potential will be produced in the postsynaptic cell. At the neuromuscular junction , synaptic action increases the probability that an action potential will occur in the postsynaptic muscle cell; indeed, the large amplitude of the EPP ensures that an action potential always is triggered. At many other synapses, PSPs actually decrease the probability that the postsynaptic cell will generate an action potential. Given that most neurons receive inputs from both excitatory and inhibitory synapses, it is important to understand more precisely the mechanisms that determine whether a particular synapse excites or inhibits its postsynaptic partner.
In neuroscience , an excitatory postsynaptic potential EPSP is a postsynaptic potential that makes the postsynaptic neuron more likely to fire an action potential. This temporary depolarization of postsynaptic membrane potential , caused by the flow of positively charged ions into the postsynaptic cell, is a result of opening ligand-gated ion channels. These are the opposite of inhibitory postsynaptic potentials IPSPs , which usually result from the flow of negative ions into the cell or positive ions out of the cell. EPSPs can also result from a decrease in outgoing positive charges, while IPSPs are sometimes caused by an increase in positive charge outflow. Larger EPSPs result in greater membrane depolarization and thus increase the likelihood that the postsynaptic cell reaches the threshold for firing an action potential.
Excitatory postsynaptic potential