Week 12: Heart Flashcards
All of the following are functions of the heart EXCEPT
generation of blood pressure.
ensuring one-way flow of blood.
generation of the formed elements of the blood.
regulation rate and force of blood delivery.
distribution of oxygenated blood to tissues.
generation of the formed elements of the blood.
Which of these statements concerning the form and location of the heart is correct?
The apex is the most superior part of the heart.
The apex is directed to the left, and deep to the 5th intercostal space.
The base of the heart is directed inferior and slightly posterior.
The most superior part of the heart is deep to the 12th intercostal space.
The apex is directed to the left, and deep to the 5th intercostal space.
The pericardium, or pericardial sac,
is a double-layered, closed structure.
anchors the heart in the mediastinum.
has a tough, fibrous, connective tissue outer layer.
has an inner layer of squamous epithelial cells.
is a double-layered, closed structure.
anchors the heart in the mediastinum.
has a tough, fibrous, connective tissue outer layer.
has an inner layer of squamous epithelial cells.
The serous pericardium just internal to the fibrous pericardium is called the
parietal pericardium.
The blood vessels that supply oxygenated blood to the heart tissue itself are the
coronary arteries.
The tricuspid valve
prevents blood flow from the right ventricle to the right atrium
Which of these is NOT one of the large veins carrying blood to the heart?
Superior vena cava
Inferior vena cava
Pulmonary trunk
Pulmonary vein
Coronary sinus
Pulmonary trunk
Which of these statements concerning the normal pathway of blood flow is NOT correct?
Blood flows from the pulmonary arteries to the lungs.
Blood flows from the pulmonary veins to the right atrium.
Blood flows from the aorta to all parts of the body.
Blood flows from the coronary sinus to the right atrium.
Blood flows from the pulmonary veins to the right atrium.
In a normal heart, when the right ventricle contracts, it forces blood through the __________ valve.
pulmonary semilunar
Which of these statements concerning the functional characteristics of the heart chambers is NOT correct?
During ventricular diastole, blood collects in the right and left atria.
At the very beginning of ventricular diastole, blood flows directly from the atria into the relaxed ventricles.
70% of ventricular filling occurs before the atria contract.
During ventricular systole, the atrioventricular valves close.
During ventricular diastole, the semilunar valves open.
During ventricular diastole, the semilunar valves open.
The vessel labeled with the letter B delivers blood
from the right ventricle to the lungs.
prevent the backflow of blood into the atria during ventricular systole
Papillary muscles
Papillary muscles are attached to the cusps of valves by thin, strong, connective tissue strings called
the chordae tendineae.
The cardiac skeleton
forms fibrous rings around the atrioventricular and semilunar valves.
serves as electrical insulation between the atria and ventricles.
provides a rigid source of attachment for cardiac muscle.
provides solid support for the heart valves.
forms fibrous rings around the atrioventricular and semilunar valves.
serves as electrical insulation between the atria and ventricles.
provides a rigid source of attachment for cardiac muscle.
provides solid support for the heart valves.
When all ventricular cells depolarize and then repolarize, this is shown on an EKG as the __________.
Q-T interval
