Practice Flashcard 1 for EKG Exam

Front

Which of the following lines the inside of the heart chambers and makes up heart valves? endocardium, myocardium, pericardium, epicardium

Back

endocardium

Front

What is the best description for the location of the heart?

Back

in the mediastinum

Front

Which of the following is true? superior vena cava returns blood from the upper body, inferior vena cava returns blood from the lower body

Back

superior vena cava returns blood from the upper body, inferior vena cava returns blood from the lower body

Front

Name the thick outer layer of the heart that protects and separates it from the rest of the chest cavity.

Back

pericardium

Front

The coronary arteries send blood directly to

Back

the heart muscle (myocardium)

Front

Compare the Coronary Arteries to the Aorta in terms of size of lumen?

Back

the Aorta is wide (1 inch) the Coronary artery is narrow (1/8 inch)

Front

When electrical stimulation hits _____________________ the heart contracts.

Back

myocardium

Front

Unlike skeletal muscle tissue which is also striated, cardiac muscle is branched. What does this allow?

Back

contraction of the entire heart in a coordinated way

Front

Which part starts the first step in the electrical conduction system?

Back

sinoatrial node

Front

Which part would be second in the electrical conduction system? Options: sinoatrial node, AV node, AV Bundle branches, Purkinge fibers

Back

AV node