ap help 1
Which of the following is not part of the conduction system of the
A) AV node
B) bundle of His
C) AV valve
D) SA node
Isovolumetric contraction ________.
A) refers to the short period during ventricular systole when the ventricles are completely closed chambers
B) occurs while the AV valves are open
C) occurs immediately after the aortic and pulmonary valves close
D) occurs only in people with heart valve defects
The tricuspid valve is closed ________.
A) while the ventricle is in diastole
B) when the ventricle is in systole
C) while the atrium is contracting
D) by the movement of blood from atrium to ventricle
Damage to the ________ is referred to as heart block.
A) SA node
B) AV valves
C) AV bundle
D) AV node
Which of the events below does not occur when the semilunar valves
A) Ventricles are in diastole.
B) Blood enters pulmonary arteries and the aorta.
C) AV valves are closed.
D) Ventricles are in systole.
During the period of ventricular filling ________.
A) pressure in the heart is at its peak
B) blood flows passively through the atria and the open AV valves into the ventricles
C) the atria remain in diastole
D) it is represented by the P wave on the ECG
The receptor for static equilibrium is the ________.
A) semicircular canals
D) cochlear duct
An essential part of the maculae involved in static equilibrium is
(are) the ________.
A) spiral organ (of Corti)
C) scala media