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.