Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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For a signal to be sent down an axon of a nerve cell, an action potential must be generated. This is done by..
Select one:
a. G-protein coupled receptors bind ligand, a phosphorylation cascade occurs, this causes a change in charge of the membrane due to the addition of phosphates allowing Na+ channels to open.
b. Ligand-gated K+ channels open, allowing K+ to rush out of the cell and depolarize that part of the membrane. This change in charge opens neighboring voltage-gated channels.
c. Ligand-gated Na+ channels open, allowing Na+ to rush in. This then depolarizes that region of the membrane resulting in opening neighboring voltage-gated channels.
d. Receptor tyrosine kinases have two Na+ molecules bind, this opens voltage-gated channels allowing the “signal” to pass down the axon.
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