Search all MERLOT
Select to go to your profile
Select to go to your workspace
Select to go to your Dashboard Report
Select to go to your Content Builder
Select to log out
Search Terms
Enter username
Enter password
Please give at least one keyword of at least three characters for the search to work with. The more keywords you give, the better the search will work for you.
Select OK to launch help window
Cancel help


Advanced Search


Search > Learning Exercise Results > Interpretation of Three-Dimensional Model

Learning Exercise: Interpretation of Three-Dimensional Model

Interpretation of Three-Dimensional Model
Students are asked to answer specific questions about the animated interaction between actin and myosin. Students should have prior knowledge of the general terminology of muscle contraction, such as "cross bridge and power stroke" prior to attempting this activity.
Course: Animal physiology, cell biology, general biology


Submitted by:
Thomas Lonergan
Date Last Modified:
January 11, 2002


Answer the following questions.
1. In this animation, two events happen when calcium binds to troponin.
Describe these events.
2. What event happens immediately after magnesium binds to the myosin head
3. What happens to the position of the myosin head group when ATP binds?
4. What happens to the position of the myosin head group when the ATP is
hydrolyzed and ADP is attached to the head group?
5. Why does the actin filament only move in one direction?



  • College General Ed


Animal physiology, cell biology, general biology


Knowledge of muscle contraction terminology, such as cross bridge, power stroke, ATP hydrolysis prior to attempting assignment.

Learning Objectives

Build on the traditional two-dimensional model of muscle contraction by accurately describing specific steps in an animation.
Learn to accurately describe steps in a complex process.
Demonstrate mastery beyond memorization.

Type of Task

  • Individual
  • Supplemental activity
  • Unsupervised