MasteringAandP: Chapter 19 Quiz

Chemoreceptor reflexes respond to

All of the answers are correct.

________ are the only blood vessels whose walls are thin enough to permit blood-tissue exchange.

Capillaries

Describe the roles of the natriuretic peptides. (Module 19.10C)

The roles of these peptides are to trigger responses whose combined effects are to decrease blood volume and decrease blood pressure.

The foramen ovale in the fetal heart is located

between the right atrium and left atrium.

Capillaries that have a complete lining are called

continuous capillaries.

What effect does an increase in the respiratory rate have on CO2 levels? (Module 19.11C)

decreases CO2 levels

Identify the hormones responsible for short-term regulation of decreasing blood pressure and blood volume. (Module 19.10A)

epinephrine and norepinephrine

Sinusoids can be found in the

liver

Pulmonary arteries carry blood to the

lungs

Which of the following break(s) the rule that arteries carry oxygenated blood away from the heart?

pulmonary arteries

Venoconstriction ________ the amount of blood within the venous system, which ________ the volume in the arterial and capillary systems.

reduces; increases

Blood returning from the systemic circuit enters the

right atrium

Which of the following layers of a vessel contains collagen fibers with scattered bands of elastic fibers?

tunica externa

The layer of the arteriole wall that can contains smooth muscle and can produce vasoconstriction is the

tunica media

The muscular layer of a blood vessel is the

tunica media

Which layer of a blood vessel contains concentric sheets of smooth muscle tissue?

tunica media

After blood leaves the capillaries, it enters the

venules.

If a person has a blood pressure of 120/90, his mean arterial pressure would be ________ mm Hg.

100

________ are multiple arteries that fuse in order to serve a single capillary network.

Collaterals

Describe the systemic circuit. (Module 19.1B)

The systemic circuit transports blood through the arteries, capillaries, and veins of the body from the left ventricle to the right atrium.

Describe the distribution of total blood volume in the body. (Module 19.4C)

The volume is divided into the systemic venous system (64%), systemic arterial system (13%), in the heart (7%), pulmonary circulation (9%), and systemic capillaries (7%).

Which is greater: arterial pressure or venous pressure? (Module 19.5B)

arterial pressure

Blood flow to a tissue will increase if the

arterioles dilate.

Nutrients from the digestive tract enter the

hepatic portal vein.

All of the following occur in response to hemorrhage except

increase in blood pressure.