Answered: For a signal to be sent down an axon of…

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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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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