BIO 1150 - Neurophysiology ; Exam 3 Review (2/24/23)

Exocytosis of neurotransmitter into the synaptic cleft is triggered by an influx of ____ in response to the arrival of an action potential in the axon terminal

Ca2+

The movement of an electrical charge across a membrane

Current

The membrane potential at which there is no net flux of an ion across the membrane

Equilibrium potential

A reflection of the unequal distribution of positive and negative ions across the plasma membrane

Membrane potential

The opening of ion channels that are stimulated by the binding of a neurotransmitter to its receptor on a neighboring neuron, and the subsequent movement of ions across that membrane

Postsynaptic potential

A _____ is a subthreshold change in membrane potential that decays as it travels away from its point of origin

graded potential

Which of the following physiological responses is associated with an elevation in sympathetic nervous system activity?: a. decreased heart rate. b. increased contractile force of heart. c. enhanced digestion

increased contractile force of heart.