Which layer of blood vessels contains smooth muscle?
A) tunica externa
B) tunica intima
C) tunica media
D) None of the listed responses is correct.
C
Explanation:
A) The tunica externa is not the smooth muscle layer of blood vessels.
B) The tunica intima is not the smooth muscle layer of blood vessels.
D) One of the listed responses is correct.
You might also like to view...
Secondary peristaltic waves in the esophagus occur
a. when a large or sticky bolus becomes stuck in the esophagus b. through coordination by the swallowing center c. through coordination by extrinsic nerve signals d. through b and c e. only in the duodenum
The ________ is a bone that forms in the quadriceps tendon of the knee.
Fill in the blank(s) with the appropriate word(s).
Identify the highlighted structure.
Chemical barriers composed of phospholipid bilayers form within biological systems because
A. the inability of the polar heads to dissolve in water causes the heads to adhere to one another. B. hydrophobic exclusion results in the close positioning of the nonpolar tails. C. van der Waals forces attract the polar heads to the water inside the cell. D. cells expend ATP to position the phospholipid tails close together.