Vocab
What is the septum?
A muscular wall that separates the left and right sides of the heart.
What are ventricles "doing" during atrial contraction?
Relaxing
Where does the aorta receive blood from?
The pacemaker of the heart is located in the upper wall of the
Right atrium
Cancer of the bone marrow or lymph tissue
Leukemia
What is diastole?
A brief period of rest
Through which of the following semilunar valves does oxygenated blood pass?
Aortic valves
The right ventricle pumps blood to the
Pulmonary artery
The purpose of the right heart is to pump blood
a. to the systemic circulation.
b. into the aorta.
c. to the left anterior descending and circumflex arteries.
d. to the lungs for oxygenation.
d. to the lungs for oxygenation.
What does a plastic anemia result in?
injury or destruction to the bone marrow
Define hemoglobin
Complex protein composed of a protein called globin and the iron compound called heme that are in erythrocytes.
The pulmonic and aortic valves
are semilunar valves
The vessel(s) that carry(ies) blood from the pulmonary capillaries to the left atrium is (are)?
Pulmonary veins
Which group is incorrect?
a. Semilunar valves: pulmonic, aortic
b. Atrioventricular valves: tricuspid, bicuspid, mitral
c. Structures that carry oxygenated blood: pulmonary veins, left ventricle, aorta
d. Structures that carry unoxygenated blood: right ventricle, venae cavae, pulmonary
Structures that carry unoxygenated blood: right ventricle, venae cavae, pulmonary
What is an aneurysm?
A ballooning out on the wall of a blood vessel
Define systole
A period of contraction
The atrioventricular node (AV node)
delays the electrical signal coming from the atria into the ventricles
Chordae tendinea are not associated with this valve
Aortic
During ventricular contraction the..
AV valves close
Define myocardial infarction
a blockage in the coronary arteries cuts the blood supply to the heart (heart attack)
What are thrombocytes?
Fragments or pieces of cells
Which layer of the heart allows for it to act as a pump?
Myocardium
Where does the cardiac action potential (cardiac impulse) normally originate?
SA node
The heart
a. lies within the mediastinal and thoracic cavities.
b. beats only in response to stimulation by the autonomic nerves.
c. is located within the pleural cavity.
d. is located between the fifth and twelfth ribs in the left thoracic region.
lies within the mediastinal and thoracic cavities.
_______ occurs when fatty plaques (cholesterol) are deposited on the walls of the arteries
Atherosclerosis