When calcium ions are present in the cytoplasm but not ATP, myosin heads willbe:unbound in a high energy statebound to actin subunits in a low energy stateunbound in a low energy statebound to actin subunits in a high energy state Summed twitches create a greater amount of tension in skeletal muscle cellsbecause NOTE: select all the correct answer choices.Cross-bridge cycling occurs faster.The muscle cell is becoming more depolarized with every additional stimulus.Each addition twitch releases more calcium into the cytoplasm.More troponin is being bound by calcium.

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When calcium ions are present in the cytoplasm but not ATP, myosin heads will be: unbound in a high energy state bound to actin subunits in a low energy state unbound in a low energy state bound to actin subunits in a high energy state

When calcium ions are present in the cytoplasm but not ATP, myosin heads will be: unbound in a high energy state bound to actin subunits in a low energy state unbound in a low energy state bound to actin subunits in a high energy state

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter32: Structural Support And Movement

Section: Chapter Questions

Problem 2SA

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Question

When calcium ions are present in the cytoplasm but not ATP, myosin heads will
be:
unbound in a high energy state
bound to actin subunits in a low energy state
unbound in a low energy state
bound to actin subunits in a high energy state

Summed twitches create a greater amount of tension in skeletal muscle cells
because NOTE: select all the correct answer choices.
Cross-bridge cycling occurs faster.
The muscle cell is becoming more depolarized with every additional stimulus.
Each addition twitch releases more calcium into the cytoplasm.
More troponin is being bound by calcium.

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