Heart Anatomy
What is the layer of the heart responsible for contraction?
What is the myocardium?
What is the amount of blood pumped by the heart in one minute called?
How can cardiac output be calculated?
What is Stroke Volume (SV x HR) times Heart Rate?
What is the role of the sympathetic nervous system?
To increase the heart rate and force of contractions
What is angina pectoris?
What is pain due to reduced blood flow to the heart?
Which valve prevents backflow of blood from the left ventricle to the left atrium?
What is the mitral valve?
What term refers to the strength with which the heart contracts?
What is inotropy?
A person with a heart rate of 74 bpm and a stroke volume of 70 mL/beat will have a cardiac output of?
What is 5180 ml per minute?
What receptors detect a change in blood pressure?
what are baroreceptors?
What does myocardial ischemia refer to?
What is lack of oxygen to the heart muscle?
The tricuspid and mitral valves (AV valves)
The volume of blood pumped from the left ventricle during each heart beat is known as?
What is stroke volume?
What is the main function of baroreceptors?
What is to detect changes in blood pressure?
Explain the difference between sympathetic and parasympathetic stimulation of the heart
Sympathetic increases heart rate and contraction strength, while parasympathetic stimulation decreases them
What layer of the heart is directly responsible for pumping blood?
What is the myocardium?
Which arteries supply oxygen-rich blood to the heart muscle?
Coronary Arteries
What is the percentage of blood pumped out of the ventricles with each beat called?
What is ejection fraction?
Cardiac output decreases in which condition?
What is shock, loss of blood (hemorrhage), CHF (congestive heart failure)?
They monitor levels of oxygen and carbon dioxide in the blood to maintain homeostasis
Blockage of a coronary artery can lead to what condition?
What is myocardial infarction?
What is another term for a heart attack?
Myocardial Infarction
What happens if cardiac output decreases?
What is lower blood pressure and possible organ dysfunction
Which system slows down the heart rate?
What is the parasympathetic nervous system?
Describe two possible reasons for decreased cardiac output
Low blood volume, heart failure, stroke,
What is the term for the waxy substance that builds up inside the coronary arteries?
What is plaque?