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Chapter 9B Class Notes
BSC 20850 Fall 2010
(Slide #49) What are the 2 requirements for Muscle Contraction? What are 2 steps of ExcitationCoupling?
(Slide #50) Skeletal muscles are stimulated by ___________________________________, which are
part of the ______________ nervous system. Electrical impulses of motor neurons travel from the
_______________________ via ____________ to skeletal muscles.
(Slide #51) The electrical impulses traveling from the motor nerve to the sarcolemma and T tubules of
the muscle fiber are called ___________________________.
Each _________ forms several branches as it enters a muscle. Each axon ending forms a
___________________________
junction with a single muscle fiber.
(Slide #54) The Axon terminal and Muscle fiber are separated by a gel-filled space called the
______________________________________.
(Slides #55 – 61) What are the 6 steps of Events at the Neuromuscular Junction? Please include the 3
sub-steps of Step 5.
(Slide #61) What is the role of acetylchoinesterase?
(Slides #62 – 71) Please describe in detail, the Events in the Generation and Propagation of an Action
Potential along the Muscle Sarcolemma. Please include a description of Repolarization.
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(Slide #72) Excitation-Contraction (E-C) Coupling is a sequence of events whereby an Action Potential
traveling along the sarcolemma leads to the __________________________________________ that
creates a ______________________.
What is the Latent Period of E-C Coupling?
(Slide #74) What are the first 2 Steps of E-C Coupling?
(Slide #74) T tubules and the SR form an integrated ____________.
Ca2+ is necessary for muscle
_______________.
Slides # 79 – 80) What are Steps 3 and 4 of E-C Coupling?
(Slide #84) The ___________________________continues as long as the Ca2+ signal and adequate
________ are present.
(Slides #84 – 90) Please describe the 4 Steps of the Cross Bridge Cycle.