After nervous stimulation stops, what prevents acetylcholine in the synaptic cleft from continuing to stimulate contraction?"calcium ions returning to the terminal cisternaethe tropomyosin blocking the myosin once full contraction is achievedacetylcholinesterase destroying the acetylcholineDuring the repolarization phase of an action potential a small region of the inner surface of a muscle cell's membrane becomes more _________.negative as potassium diffuses into the cellpositive as potassium diffuses into the cellnegative a potassium diffuses out of the cellpositive as sodium diffuses out of the cellA electrical impulse travels deep into the muscle fiber alongthe sarcolemmaT-tubule membranesthe endomysiummyofibrilsWhen stimulated by a muscle impulse, what do the terminal cisternae release into the sarcoplasm?""sodium ions, Na+""calcium ions, Ca2+""adenosine triphosphate, ATP""acetylcholine, ACh"Which of the following is the correct sequence of events for muscle contractions?"action potential in neuron, neurotransmitter release, muscle cell action potential, release of calcium ions from sacroplasmic reticulum, ATP-driven power stroke, sliding of myofilaments"" neurotransmitter release, muscle cell action potential, action potential in neuron, release of calcium ions from sarcoplasmic reticulum, sliding of myofilaments, ATP-driven power stroke"" action potential in neuron, neurotransmitter release, release of calcium ions from sarcoplasmic reticulum, muscle cell action potential, ATP-driven power stroke""neurotransmitter release, release of calcium ions from sarcoplasmic reticulum, muscle cell action potential, sliding of myofilaments, ATP-driven power stroke"In excitation-contraction coupling the excitation refers to the____.bond that actin head groups must form with myosin before a contraction can occuraction potential traveling along the muscle cell membraneexcitation of the sarcoplasmic reticulum that triggers the release of ATP.ALL OF THE ABOVE

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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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After nervous stimulation stops, what prevents acetylcholine in the synaptic cleft from continuing to stimulate contraction?"

calcium ions returning to the terminal cisternae
the tropomyosin blocking the myosin once full contraction is achieved
acetylcholinesterase destroying the acetylcholine

During the repolarization phase of an action potential a small region of the inner surface of a muscle cell's membrane becomes more _________.

negative as potassium diffuses into the cell
positive as potassium diffuses into the cell
negative a potassium diffuses out of the cell
positive as sodium diffuses out of the cell

A electrical impulse travels deep into the muscle fiber along

the sarcolemma
T-tubule membranes
the endomysium
myofibrils

When stimulated by a muscle impulse, what do the terminal cisternae release into the sarcoplasm?"

"sodium ions, Na+"
"calcium ions, Ca2+"
"adenosine triphosphate, ATP"
"acetylcholine, ACh"

Which of the following is the correct sequence of events for muscle contractions?

"action potential in neuron, neurotransmitter release, muscle cell action potential, release of calcium ions from sacroplasmic reticulum, ATP-driven power stroke, sliding of myofilaments"
" neurotransmitter release, muscle cell action potential, action potential in neuron, release of calcium ions from sarcoplasmic reticulum, sliding of myofilaments, ATP-driven power stroke"
" action potential in neuron, neurotransmitter release, release of calcium ions from sarcoplasmic reticulum, muscle cell action potential, ATP-driven power stroke"
"neurotransmitter release, release of calcium ions from sarcoplasmic reticulum, muscle cell action potential, sliding of myofilaments, ATP-driven power stroke"

In excitation-contraction coupling the excitation refers to the____.

bond that actin head groups must form with myosin before a contraction can occur
action potential traveling along the muscle cell membrane
excitation of the sarcoplasmic reticulum that triggers the release of ATP.
ALL OF THE ABOVE

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