a&p chapter 11 HW

t wave

The third wave that results from currents flowing during the repolarization of the ventricles.

The valves located between the atria and ventricles are known as the ________ valves.

atrioventricular

The first heart sound, "lub," is caused by the closure of the ________ valves.

atrioventricular (AV)

What part of the heart's intrinsic conduction system carries impulses into the interventricular septum?

atrioventricular (AV) bundle

Where does the sinoatrial node send an impulse after it initiates the electrical signal?

atrioventricular (AV) node

What blood vessel do you palpate when checking the pulse in your neck?

common carotid artery

When ventricles ________, the AV valves are closed.

contract

Which of the following supply the myocardium with oxygen-rich blood?

coronary arteries

By what pathway does oxygen leave capillaries to supply body tissues?

diffusion of capillary cell membranes

The layer of the heart wall synonymous with the visceral layer of the serous pericardium is ________.

epicardium

The longest veins in the body drain the leg and are the ________.

great saphenous veins

Which of these events is NOT associated with ventricular systole?

heart is relaxed

The single vessel that drains blood from the digestive tract organs to the liver is the ________.

hepatic portal vein

The external carotid artery serves the skin and muscles of the head and ________.

neck

The pressure that draws fluid into capillaries since blood has a higher solute concentration than interstitial fluid is known as ________.

osmotic pressure

What is the function of the heart valves?

prevents back flow of blood

The transportation of blood from the right side of the heart to the lungs and back to the left side of the heart is known as ________ circulation.

pulmonary

Which one of the following blood vessels carries oxygenated blood?

pulmonary vein

The left atrium receives blood from the ________.

pulmonary veins

Which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart?

sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle (bundle of His), right and left bundle branches, Purkinje fibers

Which of these will decrease heart rate?

stimulation by vagus nerves

p wave

the first wave on an ECG that follows the firing of the SA node. This wave is small and signals the depolarization of the atria immediately before they contract.

A pulmonary embolism can be a direct result from which of the following conditions?

thrombophlebitis

Through which valve will blood flow when leaving the right atrium?

tricuspid valve

Which type of vessel has a thick tunica media?

artery

When the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the ________.

left ventricle to the left atrium

QRS complex

The large wave that results from the depolarization of the ventricles and precedes the contraction of the ventricles.

Which of these pathways correctly traces blood as it travels from the aortic arch to the left arm?

aortic arch, left subclavian artery, left axillary artery, left brachial artery

The pointed, inferior portion of the heart, known as the ________, rests on the diaphragm and is oriented toward the left hip.

apex

Large blood vessels that carry blood away from the heart are called ________.

arteries

Where is the hepatic portal vein located?

between the stomach, intestines, and the liver

Fluid tends to be forced out of a capillary bed by ________ while ________ tends to draw fluid into the capillary bed.

blood pressure; osmotic pressure

Which type of vessel is constructed only from tunica intima?

capillaries