Circular bands of muscle fibers that constrict a passage are called:
A) Ligaments
B) Sphincters
C) Tendons
D) Joints

Question

Quizplus · Accepted Answer

Sphincters are circular bands of muscle fibers that constrict a passage, such as the anal sphincter or the sphincter muscle that controls the opening and closing of the bladder. Ligaments are tough, fibrous bands of tissue that connect bones to other bones, while tendons connect muscles to bones. Joints are the places where two or more bones come together.

Circular Bands of Muscle Fibers That Constrict a Passage Are