Heart lab quiz

The pulmonary trunk

An artery

In the EKG, the P wave is generated when the

Atria depolarizes

The beginning of the ventricular contraction, when all four valves are closed is called

Isovolumetric contraction

The base of the heart faces in the what direction?

Posterior and superior

Which correctly describes the heart's apex?

Projects slightly anteroinferiorly toward the left side of the body

Which Carrie's oxygenated blood from the lungs to the heart ?

Pulmonary veins

Which heart chambers contain deoxygenated blood ?

Right atrium and right ventricle

Which is the sequence of the events in the transmission of an implied through the heart muscle ?

SA node- through the artiria- AV node- AV bundle- Bundle branches- purkinje fibers- through the ventricles

The main functions of the cardiovascular system include the transport and exchange of respiratory gases, nutrients, and wastes throughout the body

True

The term "epicardium" is another name for the ?

Visceral layer of the serosal pericardium

Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?

aortic semilunar valve

bicuspid valve

between left atrium and left ventricle

tricuspid valve

between right atrium and right ventricle

Tachycardia

heart rate greater than 100 bpm

Bradycardia

heart rate less than 60 bpm

What are the cell-to-cell contacts of the cardiac muscle fibers called ?

intercalated discs

The layer of the heart wall composed of cardiac muscle tissue is the

myocardium

The heart valves

permit the passage of blood in one direction

Which of the cardiovascular system's circuits has deoxygenated blood in its arteries?

pulmonary circuit

fibrillation

rapid, random, and ineffective contractions of the heart

In an ECG, what does the T wave represent?

repolarization of ventricles

Each of the receiving chambers of the heart has a wrinkled flaplike extension; the one that is more visible from an anterior view is the

right auricle

Which circuit of the cardiovascular system is responsible for sending blood to the kidneys, stomach, and pelvic regions?

systemic circuit

The function of the coronary sinus is to

take blood from the coronary circulation to the right atrium

The pericardial cavity is between the

visceral and parietal layers of the serous pericardium