prevent (3pts) Chelators are compounds that bind tightly to specific ions an eliciting a biochemical effect. The drug BAPTA is a chelator of Ca2+ ions. How would injection of BAPTA into a presynaptic neuron affect postsynaptic cells?
prevent (3pts) Chelators are compounds that bind tightly to specific ions an eliciting a biochemical effect. The drug BAPTA is a chelator of Ca2+ ions. How would injection of BAPTA into a presynaptic neuron affect postsynaptic cells?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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
Transcribed Image Text:3. (3pts) Chelators are compounds that bind tightly to specific ions and prevent them from
eliciting a biochemical effect. The drug BAPTA is a chelator of Ca2+ ions. How would
injection of BAPTA into a presynaptic neuron affect postsynaptic cells?
a. Nothing would happen because postsynaptic potentials are due to Na+, K+ and Cl- ion
mediated currents.
b. The postsynaptic membrane potentials would be more polar when presynaptic cells are
stimulated.
c. There would be a reduction in postsynaptic currents upon stimulation of the presynaptic
cell.
d. Evoked postsynaptic potentials would be normal, but there would be a decrease in the
frequency of spontaneous postsynaptic potentials.
e. There would not be action potentials fired in presynaptic cells.
Page 1 of 6
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