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blocked the pore/channel in the L-type calcium channel in cardiac muscle cells. The drug had no other effects. True/false: Cross-bridge cycling and tension production would occur normally in drug-treated fibers. 2) The plateau phase of a cardiac action potential

blocked the pore/channel in the L-type calcium channel in cardiac muscle cells. The drug had no other effects. True/false: Cross-bridge cycling and tension production would occur normally in drug-treated fibers. 2) The plateau phase of a cardiac action potential

Human Anatomy & Physiology (11th Edition)
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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1) A drug was applied to a person that blocked the pore/channel in the L-type calcium channel in cardiac muscle cells. The drug had no other effects.

True/false: Cross-bridge cycling and tension production would occur normally in drug-treated fibers.

2) The plateau phase of a cardiac action potential is an absolute refractory period.True/false

3) If a heart lacked gap junctions, an organ-level contraction would occur.True/false

4) During a pacemaker potential, what is caused in neighboring muscle fibers when threshold potential is reached.

Group of answer choices
a)cross-bridge cycling
b)Receptor potential
c)An action potential
d)A graded potential
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