QuestionSBA
QuestionChoice
The tunica externa provides basic structural support to blood vessels but does not produce NO.
10026778
d
Tunica externa
QuestionChoice
The internal elastic lamina is a fenestrated sheet that forms a barrier between the tunica intima and tunica media.
10026776
b
Internal elastic lamina
QuestionChoice
Smooth muscle provides the tone of blood vessels. Whilst NO is an important vasodilator which acts on vascular smooth muscle, it is not produced in vascular smooth muscle
10026777
c
Smooth muscle
QuestionChoice
The external elastic lamina helps to maintain the elasticity of the arterial wall but does not produce NO
10026779
e
External elastic lamina
QuestionChoice
Endothelial cells regulate the exchange of substances between the circulating blood and surrounding tissue. NO is continuously produced by the endothelium and acts on the smooth muscle to cause smooth muscle relaxation. Production can be increased by increased sheer stress (e.g. increased blood pressure)
10026775
a
Endothelium
Concept
Chapter
2693
5920
Structure and function of blood vessels
Topic
159
Cardiovascular physiology
17753
Nitric oxide is a potent vasodilator that is used to regulate blood vessel tone. It is produced in the walls of blood vessels and stimulates the production of cGMP.

In which layer of the blood vessel wall is it produced?
a