a&p quiz 10 chap 11&12

P wave

Contraction of the atria results from which wave of depolarization on the ECG tracing ?

SA node =tissue mass embedded in the posterior wall of the right atrium

Identify the correct match .

AV valves only

Increased pressure in the ventricles would close what valve ( s ) ?

ventricular diastole

Isovolumetric relaxation and ventricular filling ( two phases of the cardiac cycle ) take place during

isovolumetric contraction , ventricular ejection , isovolumetric relaxation

Put the phases of the cardiac cycle in the correct order , starting after ventricular filling .

coronary

Systemic circulation is to the body as the ______ circulation is to the heart .

parasympathetic

The cardioinhibitory center controls activities of the _____motor neurons .

the release of tissue factor by damaged endothelium .

The extrinsic pathway of coagulation is activated by

stabilize the position of the heart valves

The function of the cardiac skeleton is to

an increase in stroke volume

The release of norepinephrine at synapses in the myocardium results in

ventricles

The semilunar valves prevent backflow into the

greater pressure in the aorta than in the left ventricle

What causes the aortic semilunar valve to close ?

electrical activity in the heart

What does the ECG wave tracing represent ?

ventricular depolarization

What does the QRS complex represent in the ECG wave tracing ?

A drop in osmotic pressure of plasma would cause blood volume to decrease

What would happen if the plasma protein , albumin , could easily cross capillary walls ?

Fibrinolysis

Which of the following begins with the activation of plasminogen ?

Internal bleeding

Which of the following could cause the hematocrit to decrease significantly below a normal value

Most blood flows passively into the ventricles through open AV valves .

Which of the following is correct about the filling of the ventricles ?

neutrophils : antibody production

Which of the following pairs are mismatched ?

Type AB blood does not contain anti - A or anti - B antibodies .

Which of the following statements is true regarding the blood of an individual with Type AB ?

SA node

Which part of the conduction system initiates the depolarizing impulse , which spreads throughout the heart ?

AV node

Which part of the intrinsic conduction system delays the impulse briefly before it moves on to the ventricles ?

The epicardium is a serous membrane that consists of an exposed epithelium and an underlying layer of areolar tissue

Which statement is correct regarding the heart wall ?

Pressure in the atria would be greater than the pressure in the ventricles .

Describe the pressures in the atria and ventricles that would cause the opening of the AV valves