Ch 18. Heart and Cardiovascular Function

veins.

Blood pressure is lowest in the

pulmonary veins.

The right atrium receives blood from all of the following except the

right and left lungs.

The right ventricle pumps blood to the

capillary hydrostatic pressure.

The vascular pressure that declines from roughly 35 mm Hg to about 18 mm Hg is the

epicardium.

The visceral pericardium is the same as the

right ventricle

The wall(s) of the ________ rest(s) on the diaphragm.

reduces; increases

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

isovolumetric contraction

What occurs at the circled label "4" on the graph?

when the peripheral vessels constrict

When will the blood pressure be greater?

artery

Where is blood pressure highest?

a trained athlete

Which of the following would you expect to have the lowest resting heart rate?

Both parts of the statement are true

Which parts of the following statement are true?The AV node delivers the stimulus to the AV bundle, located within the interventricular septum.

Autoregulation

________ is the regulation of blood flow by local mechanisms within a capillary bed.

circulatory shock

After losing 25 percent of blood volume in a motorcycle accident, which of the following compensatory responses would not occur?

stroke volume.

Analyzing of the electrocardiogram can reveal all of the following except the

The left ventricle does more work than the right ventricle.

Comparing the left ventricle with the right ventricle, which of the following is true?

decrease heart rate.

Drugs that block the beta-one adrenergic receptors will

atrioventricular valves and semilunar valves are closed.

During the isovolumetric contraction phase of ventricular systole, the

AV valves are closed.

During ventricular systole, the

ventricular diastole.

The relaxation phase of the lower chambers of the heart is called

increased hematocrit.

Each of the following changes will result in increased blood flow to a tissue except

increased parasympathetic stimulation.

Each of the following factors will increase cardiac output except

increased levels of ANP (atrial natriuretic peptide).

Each of the following will cause an increase in blood pressure except

regurgitation back into the right atrium

If a patient's tricuspid valve was leaking during systole, what would happen?

the ventricles will beat more slowly.

If the connection between the SA node and AV node becomes blocked,

a vessel 10 microns in diameter

In which of the following would the resistance be greater?

cardiac muscle cells.

Most of the middle layer in the heart wall is composed of

medulla oblongata.

Sensory neurons that are part of chemoreceptor reflexes that detect changes in carbon dioxide, oxygen, or pH levels in blood and cerebrospinal fluid are found in the

the refractory period lasts until the muscle relaxes

Tetanic muscle contractions don't occur in a normal cardiac muscle because

depolarization of the atria

The P wave of the electrocardiogram is a signal from

right coronary artery and left coronary artery

The ________ deliver(s) blood to the myocardium.

end-systolic volume

The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.

interventricular septum

The ________ separate(s) the two ventricles.

in one direction only.

The atrioventricular valves permit blood flow

between the left atrium and left ventricle.

The bicuspid, or mitral, valve is located

concentration of plasma proteins.

The blood colloid osmotic pressure mostly depends on the

pericardial cavity.

The cavity that contains only the heart is the

pulse

The difference between the systolic and diastolic pressures is called the ________ pressure.

auricle

The earlike extension of the atrium is the

Coronary

The first blood vessels to branch from the aorta are the ________ arteries.

both parasympathetic and sympathetic

The heart is innervated by ________ nerves.

6,000

The heart pumps approximately ________ milliliters of blood each minute.

aorta

The left ventricle pumps blood to the

arteriole.

The main control of peripheral resistance by the vasomotor centers occurs in the

lungs.

The pulmonary arteries carry blood to the