Which fascicle arrangement,under voluntary or involuntary regulation of contraction,can control the opening or closing an orifice (opening)?
A)pennate
B)triangular
C)circular
D)parallel
E)fusiform

Question

Quizplus · Accepted Answer

Circular fascicle arrangement is also known as a sphincter and is well-suited for controlling the opening and closing of an orifice. This arrangement forms a circular shape around an opening and can contract or relax to control the size of the opening. It is commonly found in structures such as the iris of the eye, the digestive system, and the urinary and reproductive systems.

Which Fascicle Arrangement,under Voluntary or Involuntary Regulation of Contraction,can Control