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• Which division of the autonomic nervous system would likely be activated if a student learned that an exam they had forgotten about would start in 5 minutes? Explain. • Which one of the five categories of sensory receptors is primarily dedicated to external stimuli? • Explain what is happening here in muscle contraction. Be sure to tell me what role Ca+, ATP, myosin, and actin play.

• Which division of the autonomic nervous system would likely be activated if a student learned that an exam they had forgotten about would start in 5 minutes? Explain. • Which one of the five categories of sensory receptors is primarily dedicated to external stimuli? • Explain what is happening here in muscle contraction. Be sure to tell me what role Ca+, ATP, myosin, and actin play.

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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what is happening here in muscle contraction.  Be sure to tell me what role Ca+, ATP, myosin, and actin playwhat is happening here in muscle contraction.  Be sure to tell me what role Ca+, ATP, myosin, and actin play

• Which division of the autonomic nervous system would likely be activated if a student learned that an exam they had forgotten about would start in 5 minutes? Explain. • Which one of the five categories of sensory receptors is primarily dedicated to external stimuli? • Explain what is happening here in muscle contraction. Be sure to tell me what role Ca+, ATP, myosin, and actin play. Thin filaments keee Binding of a new mol- ecule of ATP releases the myosin head from actin, and a new cycle begins. Thick filament Thin filament moves toward center of sarcomere. -Myosin head (low- energy configuration) Releasing ADP and ℗. myosin returns to its low-energy configuration, sliding the thin filament Starting here, the myosin head is bound to ATP and is in its low-energy configuration. -Myosin head (low- energy configuration) >Cross-bridge Thin filament Thick filament Actin The myosin head hydrolyzes ATP to ADP and inorganic phosphate () and is in its high-energy configuration. Myosin binding sites -Myosin head (high- energy configuration) The myosin head binds to actin, forming a cross-bridge.
Transcribed Image Text:• Which division of the autonomic nervous system would likely be activated if a student learned that an exam they had forgotten about would start in 5 minutes? Explain. • Which one of the five categories of sensory receptors is primarily dedicated to external stimuli? • Explain what is happening here in muscle contraction. Be sure to tell me what role Ca+, ATP, myosin, and actin play. Thin filaments keee Binding of a new mol- ecule of ATP releases the myosin head from actin, and a new cycle begins. Thick filament Thin filament moves toward center of sarcomere. -Myosin head (low- energy configuration) Releasing ADP and ℗. myosin returns to its low-energy configuration, sliding the thin filament Starting here, the myosin head is bound to ATP and is in its low-energy configuration. -Myosin head (low- energy configuration) >Cross-bridge Thin filament Thick filament Actin The myosin head hydrolyzes ATP to ADP and inorganic phosphate () and is in its high-energy configuration. Myosin binding sites -Myosin head (high- energy configuration) The myosin head binds to actin, forming a cross-bridge.
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