EKG Plain and Simple UPDATED 2024/2025
QUESTIONS WITH UPDATED ANSWERS
mediastinum - CORRECT ANSWER✅✅✅cavity in the thoracic cavity where heart is
located
Sternum - CORRECT ANSWER✅✅✅breastbone
Epicardium - CORRECT ANSWER✅✅✅Outermost layer of the heart
Myocardium - CORRECT ANSWER✅✅✅Middle and thickest layer of the heart
Endocardium - CORRECT ANSWER✅✅✅Thin innermost layer of the heart
Pericardium - CORRECT ANSWER✅✅✅double walled sac that encloses the heart
Right Atrium - CORRECT ANSWER✅✅✅receiving chamber for deoxygenated blood
returning to the heart from the body
Right Ventricle - CORRECT ANSWER✅✅✅pumps blood to the lungs for a fresh supply of
oxygen
Left Atrium - CORRECT ANSWER✅✅✅receiving chamber for blood returning to the heart
from the lungs.
Left ventricle - CORRECT ANSWER✅✅✅pumps blood out to the entire body. Work horse
of the heart.
,Septum - CORRECT ANSWER✅✅✅a muscular band of tissue that divides the heart into
left and right sides
Semilunar valves - CORRECT ANSWER✅✅✅separates ventricles from arties and have 3
half mood shaped leaves
Pulmonic valve - CORRECT ANSWER✅✅✅located between right ventricle and the
pulmonary artery
Aortic - CORRECT ANSWER✅✅✅valve located between the left ventricle and the aorta
Atrioventricular valves - CORRECT ANSWER✅✅✅located between and atrium and
ventricle
chordae tendineae - CORRECT ANSWER✅✅✅tendon cords that support AV valves
papillary muscles - CORRECT ANSWER✅✅✅muscles that come off the ventricular wall
Tricuspid valve - CORRECT ANSWER✅✅✅located between the right atrium and ventricle
and has three leaves
Mitral valve - CORRECT ANSWER✅✅✅located between the left atrium and ventricle and
has two leaves. Also known as bicuspid valve.
Superior Vena Cava - CORRECT ANSWER✅✅✅large vein that returns deoxygenated
blood to the right atrium from the upper part of the body
Inferior Vena Cava - CORRECT ANSWER✅✅✅large vein that returns deoxygenated blood
to the right atrium from the lower part of the body
,Pulmonary artery - CORRECT ANSWER✅✅✅Large artery that takes deoxygenated blood
from the right ventricle to the lungs to get oxygen. Only artery that carries deoxygenated blood.
Pulmonary veins - CORRECT ANSWER✅✅✅Four large veins that return oxygenated
blood from the lungs to the left atrium. Only veins that carry oxygenated blood.
Aorta - CORRECT ANSWER✅✅✅Largest artery in the body. Takes oxygenated blood
from left ventricle to feed all organs of the body.
Cardiac cycle - CORRECT ANSWER✅✅✅The mechanical events that occur to pump
blood. Has two phases
Diastole - CORRECT ANSWER✅✅✅Phase of the cardiac cycle where ventricles relax and
fill
Systole - CORRECT ANSWER✅✅✅Phase of the cardiac cycle where the ventricles
contract and expel their blood
Rapid-filling phase - CORRECT ANSWER✅✅✅First phase of diastole
Diastasis - CORRECT ANSWER✅✅✅Second phase of diastole
Atrial Kick - CORRECT ANSWER✅✅✅Last phase of diastole
Cardiac Output - CORRECT ANSWER✅✅✅Amount of blood pumped by the heart every
minute
Isovolumetric contraction - CORRECT ANSWER✅✅✅First phase of systole
, Ventricular ejection - CORRECT ANSWER✅✅✅Second phase of systole
Protodiastole - CORRECT ANSWER✅✅✅Third phase of systole
Isovolumetric relaxation - CORRECT ANSWER✅✅✅Final phase of systole
Left anterior descending(LAD) - CORRECT ANSWER✅✅✅A branch of the left main
coronary artery that feeds the anterior wall of the left ventricle
Circumflex - CORRECT ANSWER✅✅✅A branch of the left main coronary artery that
feeds the lateral wall of the left ventricle
Right coronary artery(RCA) - CORRECT ANSWER✅✅✅Feeds the right ventricle and the
inferior wall of the left ventricle
Contractile Cells - CORRECT ANSWER✅✅✅Cells that cause the heart muscles to contract
Conduction system cells - CORRECT ANSWER✅✅✅Cells that conduct electrical signals
to tell the heart when to beat.
Autonomic nervous system(ANS) - CORRECT ANSWER✅✅✅Controls involuntary
biological functions. Subdivided into two systems.
Sympathetic nervous system - CORRECT ANSWER✅✅✅Subdivision of ANS that controls
fight or flight response
norepinephrine - CORRECT ANSWER✅✅✅A chemical released by the adrenal gland.
QUESTIONS WITH UPDATED ANSWERS
mediastinum - CORRECT ANSWER✅✅✅cavity in the thoracic cavity where heart is
located
Sternum - CORRECT ANSWER✅✅✅breastbone
Epicardium - CORRECT ANSWER✅✅✅Outermost layer of the heart
Myocardium - CORRECT ANSWER✅✅✅Middle and thickest layer of the heart
Endocardium - CORRECT ANSWER✅✅✅Thin innermost layer of the heart
Pericardium - CORRECT ANSWER✅✅✅double walled sac that encloses the heart
Right Atrium - CORRECT ANSWER✅✅✅receiving chamber for deoxygenated blood
returning to the heart from the body
Right Ventricle - CORRECT ANSWER✅✅✅pumps blood to the lungs for a fresh supply of
oxygen
Left Atrium - CORRECT ANSWER✅✅✅receiving chamber for blood returning to the heart
from the lungs.
Left ventricle - CORRECT ANSWER✅✅✅pumps blood out to the entire body. Work horse
of the heart.
,Septum - CORRECT ANSWER✅✅✅a muscular band of tissue that divides the heart into
left and right sides
Semilunar valves - CORRECT ANSWER✅✅✅separates ventricles from arties and have 3
half mood shaped leaves
Pulmonic valve - CORRECT ANSWER✅✅✅located between right ventricle and the
pulmonary artery
Aortic - CORRECT ANSWER✅✅✅valve located between the left ventricle and the aorta
Atrioventricular valves - CORRECT ANSWER✅✅✅located between and atrium and
ventricle
chordae tendineae - CORRECT ANSWER✅✅✅tendon cords that support AV valves
papillary muscles - CORRECT ANSWER✅✅✅muscles that come off the ventricular wall
Tricuspid valve - CORRECT ANSWER✅✅✅located between the right atrium and ventricle
and has three leaves
Mitral valve - CORRECT ANSWER✅✅✅located between the left atrium and ventricle and
has two leaves. Also known as bicuspid valve.
Superior Vena Cava - CORRECT ANSWER✅✅✅large vein that returns deoxygenated
blood to the right atrium from the upper part of the body
Inferior Vena Cava - CORRECT ANSWER✅✅✅large vein that returns deoxygenated blood
to the right atrium from the lower part of the body
,Pulmonary artery - CORRECT ANSWER✅✅✅Large artery that takes deoxygenated blood
from the right ventricle to the lungs to get oxygen. Only artery that carries deoxygenated blood.
Pulmonary veins - CORRECT ANSWER✅✅✅Four large veins that return oxygenated
blood from the lungs to the left atrium. Only veins that carry oxygenated blood.
Aorta - CORRECT ANSWER✅✅✅Largest artery in the body. Takes oxygenated blood
from left ventricle to feed all organs of the body.
Cardiac cycle - CORRECT ANSWER✅✅✅The mechanical events that occur to pump
blood. Has two phases
Diastole - CORRECT ANSWER✅✅✅Phase of the cardiac cycle where ventricles relax and
fill
Systole - CORRECT ANSWER✅✅✅Phase of the cardiac cycle where the ventricles
contract and expel their blood
Rapid-filling phase - CORRECT ANSWER✅✅✅First phase of diastole
Diastasis - CORRECT ANSWER✅✅✅Second phase of diastole
Atrial Kick - CORRECT ANSWER✅✅✅Last phase of diastole
Cardiac Output - CORRECT ANSWER✅✅✅Amount of blood pumped by the heart every
minute
Isovolumetric contraction - CORRECT ANSWER✅✅✅First phase of systole
, Ventricular ejection - CORRECT ANSWER✅✅✅Second phase of systole
Protodiastole - CORRECT ANSWER✅✅✅Third phase of systole
Isovolumetric relaxation - CORRECT ANSWER✅✅✅Final phase of systole
Left anterior descending(LAD) - CORRECT ANSWER✅✅✅A branch of the left main
coronary artery that feeds the anterior wall of the left ventricle
Circumflex - CORRECT ANSWER✅✅✅A branch of the left main coronary artery that
feeds the lateral wall of the left ventricle
Right coronary artery(RCA) - CORRECT ANSWER✅✅✅Feeds the right ventricle and the
inferior wall of the left ventricle
Contractile Cells - CORRECT ANSWER✅✅✅Cells that cause the heart muscles to contract
Conduction system cells - CORRECT ANSWER✅✅✅Cells that conduct electrical signals
to tell the heart when to beat.
Autonomic nervous system(ANS) - CORRECT ANSWER✅✅✅Controls involuntary
biological functions. Subdivided into two systems.
Sympathetic nervous system - CORRECT ANSWER✅✅✅Subdivision of ANS that controls
fight or flight response
norepinephrine - CORRECT ANSWER✅✅✅A chemical released by the adrenal gland.
