Exam I Flashcards

artery is to _____ as vein is to _____

excess fluid in the _______ causes cardiac tamponade

tetanic muscle contractions don't occur in a normal cardiac muscle because the _____ lasts until the muscle relaxes

the adult heart is roughly the size of

The term used to describe fluid collecting in the pericardial cavity that restricts the movement of the heart is known as

The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the

Blood leaves the right ventricle by passing through the

Intercalated discs serve to transfer ________ from cell to cell

Cardiac muscle cells and skeletal muscle cells differ in a few ways. Which of the following is not one of them

When the semilunar valves close, the AV valves then

Which of the following are involved directly in pulmonary circulation?

The foramen ovale in the fetal heart is located in the ________

The long plateau phase of the cardiac muscle action potential is due to

The normal pacemaker of the heart is located in

As a result of the long refractory period in the cardiac action potential, cardiac muscle cannot
exhibit

The following are stuctural components of the conducting system of the heart.
1. Purkinje fibers
2. AV bundle
3. AV node
4. SA node
5. bundle branches

The sequence in which excitation would move through this system is:

If there is a complete block between the SA node and the AV node, how would the ECG be
affected?

The T wave on an ECG tracing represents

Analysis of the electrocardiogram can reveal all of the following, except the

Put in correct order the sequence in which excitation would move through the conducting system
of the heart:
1. Purkinje fibers
2. AV bundle
3. AV node
4. SA node
5. bundle branches

The first heart sound is heard when the

The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the

At a heart rate of 60 beats/minute, a cardiac cycle lasts

An increase in the rate of action potentials from baroreceptors will trigger a reflex to

The volume of blood ejected from each ventricle during a contraction is called the

"An increase in end-diastolic volume increases the stroke volume" is a way of stating

The heart is innervated by ________ nerves.

Stroke volume depends on

Cardiac output can be increased by all of the following except one. Choose the exception.

Heart rate is controlled by neurons of the cardiovascular center located in the

The cardioacceleratory center activates sympathetic neurons and the cardioinhibitory center controls parasympathetic neurons. Are either or both of these statements true

Which of these is true about the atrial reflex?
A) also called Bainbridge reflex
B) triggered by atrial mechanoreceptors
C) depends on sympathetic innervation
D) triggered by increasing venous return
E) All of the answers are correct.

Which of these would cause stroke volume to increase?

Drugs that block the beta-one adrenergic receptors will

If the force of ventricular contraction increases, what will happen to the end-systolic volume?

A patient has an end-diastolic volume of 125 ml. A heart attack has weakened her left ventricle so
it can pump a stroke volume of only 40 ml. Calculate her end-systolic volume.

Calculate cardiac output if the heart rate is 125 beats/minute, the end-diastolic volume is 130 ml, and the end-systolic volume is 40 ml.

Calculate the cardiac output of a patient with a heart rate of 100 beats/minute and a stroke volume of 75 ml.

The term ________ refers to blockage in the coronary circulation.

________ is the symptom generally brought on by coronary ischemia *Capitalize

In a procedure known as balloon ________, an inflatable balloon at the end of a catheter is used to press plaque back against the vessel wall

A procedure in which a length of the patient's vein or artery is used to create a detour around an obstruction in a coronary artery is called ________

A fine tubular wire mesh called a ________ may be inserted into a coronary vessel, holding it open.

The ________ is a remnant of an important fetal blood vessel that once linked the pulmonary and systemic circuits

The property of heart muscle to contract in the absence of neural or hormonal stimulation is called ________.

A faster-than-normal heart rate is called ________.

The contraction phase of the cardiac cycle is called ________.

The relaxation phase of the cardiac cycle is called ________.

As the heart rate slows, ________ gets longer

________ are abnormal heart sounds caused by turbulent flow through faulty valves

The backward flow of blood from a ventricle to its atrium or from a outflow vessel to its ventricle is called ________.

The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.

The ________ is the volume of blood in a ventricle at the beginning of systole.

The amount of blood remaining in the ventricle when the semilunar valve closes is the________.

________ is when the heart canʹt maintain adequate cardiac output *capitalize

The cardiac ________ is the difference between the resting and maximal cardiac output.

The principle that increasing the end-diastolic volume results in a corresponding increase in the stroke volume is known as ________.

The amount of blood returning to the heart is the ________.