Shrugging the shoulders is an example of
A. pronation.
B. circumduction.
C. elevation.
D. flexion.
Answer: C
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When myosin moves along the actin, it goes through cycles of binding and releasing (duty cycle). How does myosin keep from losing its place on the actin when it releases?
A) The time of the duty cycle is large (.99) so that it is only unattached a short time. B) The myosin is still attracted to the actin by weak electrostatic forces that prevent it from moving too far away during release. C) The myosin is attached to the actin by another protein that it uses as a safety line to prevent it from slipping too far back. D) The myosin is arranged in dimers so that when one releases, the other is bound.
The __________________ axis is the imaginary line around which sagittal plane motion occurs.
Fill in the blank(s) with the appropriate word(s).
During the luteal phase of the ovarian cycle, progesterone is ________ estrogen.
A) less than B) equal to C) greater than
Endogenous pyrogens released by macrophages causes the hypothalamus to elevate body temperature during times of infection
Indicate whether the statement is true or false