AP2 CH. 15

A 65 year-old man has a heart rate of 80 bpm and stroke volume of 50 mL. What is his cardiac output in L/min?

4

The pulmonary trunk divides into the right and left pulmonary arteries about __ centimeters above its origin.

5

Which of the following might serve as a secondary pacemaker for the heart?

AV node

What factor can increase blood pressure?

An increase in heart rate.

When the ventricular walls contract,

the mitral and tricuspid valves close.

Central venous pressure is the pressure in the inferior vena cava at the central point of the abdomen.

False.

For every artery, there is a vein with the same name.

False.

The SA node relays nerve impulses into the AV bundle of the interventricular septum and the AV node is responsible for the rhythmic contractions of the heart.

False.

The aorta is the largest artery in the pulmonary circuit.

False.

Which of the following is not a normal response to physical exercise?

Increased blood flow to the abdominal viscera

In an ECG pattern, the PQ interval indicates how long it takes for the cardiac impulse to travel from the

SA node through the AV node.

The correct sequence of parts that carry cardiac impulses is

SA node, AV node, AV bundle, Purkinje fibers

Which of the following supplies blood to parts of the intestinal tract?

Superior mesenteric artery

What is systolic pressure?

The maximum pressure achieved during ventricular contraction.

Factors that increase heart rate and blood pressure include

all of the above.

A sphygmomanometer measures

blood pressure.

The radial and ulnar veins merge to form the _______ vein.

brachial

In mitral valve prolapse, the mitral valve

bulges into the left atrium during ventricular contraction.

A left ventricular assist device

can maintain cardiac function until a donor heart becomes available.

In the cardiovascular system, what vessels are the site of nutrient, gas, and waste exchange?

capillaries

The effect on the heart of excess potassium ion concentration usually is

decreased rate and decreased force of contraction.

What blood vessel is found in the anterior-medial thigh?

femoral a.

Small areas of the myocardium contracting chaotically is called

fibrillation.

The longest vein in the body is the

great saphenous vein.

Angiotensin II increases blood pressure by

increasing peripheral resistance.

Marjorie suffers from phlebitis. She has

inflammation of her veins.

The celiac artery provides blood to the

liver and spleen.

What site is commonly used to feel a pulse?

radial artery on the wrist

In an ECG pattern, the T wave is caused by

repolarization of ventricular muscle fibers.

The ___ ventricle pumps blood to the pulmonary circuit, while the ___ ventricle pumps blood into the systemic circuit.

right; left

The systemic circuit

sends oxygen-rich blood to the tissues.

What blood vessel is a tributary of the hepatic portal vein?

splenic v.

Bruce has colorectal cancer that has spread to his lymphatic system. He is given a drug that is an angiogenesis inhibitor. The drug works by

starving tumors by cutting off their blood supplies.

What structure is also known as the pacemaker of the heart?

SA node

Which of the following waves of an ECG pattern is/are correctly described?

P wave-depolarization of atria

What is the function of chordae tendineae?

Prevent the cusps of the AV valves from moving up into the atria.

When a person's pulse is taken by palpation near the thumb on the wrist, which artery is felt?

Radial artery

Which of the following is the correct sequence of parts through which blood moves from the vena cava to the lungs?

Right atrium, tricuspid valve, right ventricle, pulmonary valve

Which artery is incorrectly matched to its location?

Thyrocervical arteries; thymus.

Blood flow through a capillary is controlled by a precapillary sphincter, which opens or closes due to the requirements of the cells the capillary supplies.

True.

Venules continue from capillaries to form veins, which return blood to the atria.

True.

Arterial systolic pressure is most closely associated with

ventricular contraction.

The blood pressure in the large systemic arteries is greatest during

ventricular systole.