Heart (A&P)
If a sample of blood is deoxygenated, where is it likely to be found in the circulatory system of the human body?
At the beginning of the pulmonary circuit.
How do you differentiate between electrical activity in atria and ventricles on an ECG?
Atrial activity is seen in the P wave, while ventricular activity is seen in the QRS complex.
How is cardiac output calculated?
By multiplying the heart rate by the stroke volume.
The most common type of heart disease is
Coronary Artery Disease (CAD)
Which of the following waves represents the spread of the electrical impulse through the atria?
P wave
In what order are the impulses transmitted in the intrinsic conduction system?
SA Node, AV Node, Bundle of His, Bundle Branches, Purkinje Fibers
The period of recovery/relaxation is represented through which wave?
T wave
Which of the following statements is true about the blood found in the pulmonary arteries?
The blood is low in oxygen and under very high pressure.
Which of the following statements is false about veins?
They carry blood away from the heart.
Arteries in the circulatory system are the blood vessels experiencing the highest pressure. How are the arteries adapted to experience such high pressures?
They have thick elastic walls which allow the vessels to expand and recoil.
What is the job of the human body's pulmonary circuit?
To carry blood to the lungs so carbon dioxide can be released and oxygen can be picked up.
What is the purpose of the systemic circuit of the human body?
To supply blood rich in oxygen and nutrients to the body.
True or False? Normal rhythmic electrical activity of the heart causes the heart of people with rapid heart beats to become disorganized and out of control, making the heart a totally useless pump.
True
The delay at the AV node supports coordinated blood flow through the heart by
allowing the atria to contract simultaneously as soon as the SA node sends the impulse
Which valve opens when the left ventricle contracts?
aortic semilunar valve
Irregular heart beats are called
arrhythmias
What is a heart rate slower than 60 beats per minute called?
bradicardia
A marathon runner might have a normal resting heart rate close to 50 beats per minute (bpm). These runners' heart rate would be classified as
bradycardia
How does your body respond when you need more blood, e.g. during a period of intense exercise?
by increasing your cardiac output
Blood flows through a closed circulatory system. Where in the system does the exchange of gases and nutrients occur?
capillaries
This type of disease may form blood clots and lead to either brain or pulmonary embolisms, as well as increase the risk of strokes.
deep vein thrombosis (DVT) PreviousNext
Atherosclerosis is seen in which of the following types of heart disease? Select all that apply.
deep vein thrombosis (DVT), coronary artery disease (CAD)
When is the human heart under the lowest pressure?
during diastole
When is blood forced into the aorta of the human heart?
during systole
tachys
fast, rapid
Which area of the body is not supplied blood by branches coming off of the aortic arch?
heart
cardia
heart
Damage and scar tissue at the AV node causing the atrias and ventricles to beat completely on their own is called
heart block
What condition could result if there is damage to the AV Node?
heart block
An individual's number of heart beats per minute is known as his __________, while the volume of blood that is pumped by his ventricles with each heartbeat is his __________.
heart rate (HR); stroke volume (SV)
This type of heart disease is caused by excessive alcohol intake, sleep apnea, diabetes, increased fat in diet, and also obesity.
hypertension
Damage or scar tissue at the AV node results in the
increased time between contractions of the atriums and ventricles
The SA node is called the pacemaker of the heart because it
initiates the heartbeat through cells that can depolarize on their own
The blood in the pulmonary veins travels to the
left atrium
Which chamber of the heart receives blood from the lungs?
left atrium
The ascending aorta receives blood from
left ventricle
Which part of the following human body is NOT considered a part of the circulatory system?
lungs
This form of heart disease of most often diagnosed congenitally (at birth). If not repaired, patients will experience symptoms such as coughing, shortness of breath, chest pain, and fluttering in the heart.
mitral valve prolapse (MVP)
myo
muscle
Can the initial electrical impulse from the sinoatrial node freely pass from the muscle fibers of the atria to the muscle fibers of the ventricles?
no
This type of heart disease have near identical risk factors as coronary artery disease, but an increase in smoking will cause this type of heart disease to occur.
peripheral artery disease (PAD)
The circulation of blood from the right side of the human heart to the lungs and back to the heart completes which circuit?
pulmonary circuit
What is the name of the circuit that travels from the heart to the lungs and back to the heart?
pulmonary circuit
Which of the following structures contains the most richly-oxygenated blood?
pulmonary veins
Fibrillation is
rapid, uncoordinated shuddering of the heart
Which chamber receives blood returning to the heart from the body?
right atrium
Which structure does the pulmonary trunk carry blood from?
right ventricle
brady
slow
Which of the following explanations describe the cardiac cycle of the human heart?
the events that happen during a single heartbeat
Which event is not happening during diastole of the human heart?
the semilunar valves are open
You are comparing audio recordings of the heartbeats of three different patients. In patient #3, you notice that the second thump of the heartbeat sounds much weaker and fainter. You would suspect that this patient's heart issue is associated with
the semilunar valves not snapping shut correctly
What might happen if the Purkinje fibers were damaged or not operating correctly?
the ventricles may not fully receive the electrical impulse that causes them to contract
Which of the following statements describes the end-diastolic volume?
the volume of blood in the ventricles after the atria contract
Systole also means
to contract
Which valve prevents backflow into the right atrium when the ventricles contract?
tricuspid valve
The QRS wave represents the spread of the electrical impulse through the
ventricles
Name the very thin, flattened vessels smaller than veins.
venules
