CH 20 QUIZ
If there is a complete block between the SA node and the AV node, how would the ECG be affected
The rate of P waves will be faster than the rate of QRS complexes
The left ventricle pumps blood to the
aorta
The atrioventricular valves permit blood flow
in one direction only.
________ is the symptom generally brought on by coronary ischemia
incorrect answer!!(Shortness of breath) look it up...
Identify the structure labeled "21."
ligamentum arteriosum
The ________ is a remnant of an important fetal blood vessel that once linked the pulmonary and systemic circuits.
ligamentum arteriosum
The coronary sulcus is a groove that
marks the border between the atria and ventricles
Each of the following factors will increase cardiac output except increased
parasympathetic stimulation
Excess fluid in the ________ causes cardiac tamponade
pericardial cavity
If the connection between the SA node and AV node becomes blocked
the ventricles will beat more slowly
The relaxation phase of the cardiac cycle is called
diastole.
Drugs known as calcium channel blockers such as nifedipine can be used to
-All are correct- produce a negative inotropic effect. decrease blood pressure. decrease the force of cardiac contraction. dilate the coronary arteries
The interventricular sulci and coronary sulcus
-All of the answers are correct- are grooves on the surface of the heart. contain arteries. contain veins. contain fat.
The right atrium receives blood from the
-All of the answers are correct-inferior vena cava. superior vena cava. coronary sinus. systemic circuit.
Calculate the cardiac output of a patient with a heart rate of 100 beats/minute and a stroke volume of 75 ml
7500 ml / min
________ is when the heart can't maintain adequate cardiac output
Heart failure
Activation of which kind of receptor causes heart rate to increase
beta-one
The ________ valve prevents backward flow into the left atrium
bicuspid
The heart is innervated by ________ nerves
both parasympathetic and sympathetic
When the left ventricle contracts, the diameter of the ventricular chamber
decreases.