Cardiovascular System 2

1 / 10

Which layer is described as being thinner than the media in elastic arteries?

Tunica externa

Tunica adventitia

Tunica intima

Internal elastic membrane

2 / 10

What role do medium or muscular arteries play in the body?

They conduct blood to smaller arteries

They regulate blood pressure by contracting or relaxing smooth muscle

They synthesize elastin

They distribute blood to the vascular system

3 / 10

What is the primary function of the smooth muscle cells in elastic arteries?

To form the endothelial layer

To transport blood to smaller arteries

To regulate blood flow through the adventitia

To synthesize collagen, elastin, and other molecules

4 / 10

How are continuous capillaries different from fenestrated capillaries?

Continuous capillaries are found in the lymphatic system, while fenestrated capillaries are not

Continuous capillaries have tight junctions, while fenestrated capillaries have small openings

Fenestrated capillaries allow for tighter control of blood flow

Continuous capillaries have fenestrae, while fenestrated capillaries do not

5 / 10

Which type of capillary has large perforations and a discontinuous basement membrane?

Continuous capillary

Sinusoidal capillary

Fenestrated capillary

Muscular capillary

6 / 10

What type of capillary has an uninterrupted basement membrane and tight endothelial junctions?

Sinusoidal capillary

Muscular capillary

Continuous capillary

Fenestrated capillary

7 / 10

What characteristic is most prominent in small arteries and arterioles?

A very thin subendothelial layer

Thick media

Extensive smooth muscle cells

A thick adventitia

8 / 10

Which layer of medium arteries has a prominent internal elastic lamina?

Tunica intima

Tunica adventitia

Subendothelial layer

Tunica media

9 / 10

What is the function of capillaries?

To supply oxygen to the tissues directly

To regulate blood pressure

To transport large amounts of blood

To distribute blood to large arteries

10 / 10

In which arteries is the tunica media particularly thick?

Small arteries

Large elastic arteries

Medium arteries

Arterioles

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