C. the movement of an arm to lift a pencil
This is an example of a voluntary muscle movement, as it involves conscious control. The other options involve involuntary muscle movements that are not under conscious control.
A.
a heart beating faster when excited
B.
the growling of a stomach when hungry
C.
the movement of an arm to lift a pencil
D.
the dilation of pupils in dark lighting
1 answer
C. the movement of an arm to lift a pencil
This is an example of a voluntary muscle movement, as it involves conscious control. The other options involve involuntary muscle movements that are not under conscious control.