Circular bands of muscle fibers that constrict a passage are called:
a. Ligaments
b. Sphincters
c. Tendons
d. Joints
Question 2
The nurse asks you to test a stool specimen for occult blood. You know that occult blood:
a. Can be seen
b. Means a black, tarry stool
c. Is hidden or unseen
d. Is dark red