Final Exam: Ch 19 Flashcards
Which of the following carry oxygen-poor blood?
Venae cavae and pulmonary arteries
Which of the following belong to the pulmonary circuit?
Pulmonary arteries and pulmonary veins
The heart is enfolded within a space called the
pericardial cavity
The apex of the heart is found ______
of the midline of the body.
To the left
Pericardial fluid is found between the
parietal layer of the serous pericardium; visceral layer of the serous pericardium
The_____ performs the work of the heart.
myocardium
the ______ are the superior chambers of the heart and the ____ are the inferior chambers of the heart
artia
ventricles
the ventricles are the thicker more powerful chambers of the heart. they pump blood to the lungs and body
true
Which structure is highlighted
Look at pic on phone
Myocardium of left ventricle
Which structure is highlighted
Look at pic
Pulmonary valve
The chordate tendinae of the AV valves are anchored to the _____ of the ventricles
Papillary muscles
The _____ valve regulates the flow of blood between the right ventricle and the vessels leading to the lungs
Pulmonary
Oxygen-poor blood passes through the
Right AV and pulmonary valves
The right atrioventricular valve regulates the opening between
Right atrium and right ventricle
The area where the major vessels lead to and from the heart’s chambers of called the ____ of the heart. The point inferior portion of called the ____
Base
Apex
The shallow depression seen on the external surface of the heart between the left and right ventricles is called the
Interventricular sulcus
Cells of the sinus trial node ________ during the pacemaker potential
Depolarize slow
When sodium channels are fully open the membrane of the ventricular cardiomyocyte
Sharply depolarizes
The long absolute refractory period of cardiomyocytes
Prevents tetanus
Atrial systole beings
During the P wave
Atrial depolarization causes the
P wave
An extended period of time between the P wave and the QRS complex may indicate which of the following
The signal is taking too long to get to the AV node
In a normal ECG the deflection that is generated by ventricular depolarization is called the
T wave
Blood pressure is usually measured in millimeters of mercury (mmHg) but could be measured with any liquid such as water (mm H2O)
True
Mercury is used to measure blood pressure because it is ____ compared to other liquids
More dense
Mitral valve prolapse causes blood to leak back into the _____ when the ventricles contract
Left atrium
When the left ventricle contracts the ___ valve closes and the ______ valve is pushed open
Mitral
Aortic
When the ventricles relax the _______ valve prevents back flow of blood into the left ventricle
Aortic
Mitral valve prolapse (MVP) generates a murmur associated with the _____ heart sound that occurs when the _____
Lubb (s1)
Ventricles contract
When the aortic semilunar valve closes and blood bounded off of it, it produces the ______ heart sound that is ultimately related to when the ____
Dupp (S2)
Ventricles relax
During isovolumetric contraction the pressure in the ventricles
Rises rapidly
What is the correct sequence of events of the cardiac cycle
- Ventricular filling
- Isovolumetric contraction
- Ventricular ejection
- Isovolumetric relaxtion
Congestive heart failure (CHF) of the right ventricle
Can cause systemic edema
Isovolumetric contraction occurs during the ____ of the electrocardiogram
R wave
Most of the ventricle filling occurs
During atrial diastole
The volume of blood ejected by each ventricle in one minute is called the
Cardiac output
Stroke volume is increased by
Increased venous return
Blood flows into vessel C from which chamber
See pic
Right ventricle
Where does blood in vessel E flow to
See pic
Right atrium
Through which valve does blood flow to enter into vessel B
See pic
Aortic
