Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
|
Describe the kind of heart found in birds. |
Two atria, two ventricles; right and left hearts separated; complete "double circulation" |
|
|
What is the name of the outermost layer of the pericardium? |
fibrous pericardium |
|
|
What is the middle layer of the heart wall called? |
myocardium |
|
|
What is an atrioventricular orifice? |
Opening between an atrium and a ventricle |
|
|
What vessel drains the blood from the heart walls into the right atrium? |
coronary sinus |
|
|
Where are the chordae tendinae located? |
Between the papillary muscles and the cusps of the heart valves |
|
|
What is meant by the term "ischemia?" |
Blood oxygen deficiency |
|
|
A heart attack is also known as a? |
Myocardial infarction |
|
|
During atrial systole, the atria are _________. |
Contracting |
|
|
Ventricular relaxation is also known as? |
Ventricular diastole |
|
|
Inflammation of the endocardium is called? |
Endocarditis |
|
|
What serves as the natural "pacemaker" of the heart? |
S-A Node |
|
|
What is the functional syncytium? |
A mass of merging cells that act as a unit |
|
|
What nerves of the parasympathetic nervous system carry impulses continuously to the S-A and A-V Nodes? |
Vegus nerves |
|
|
Where do these nerves originate? |
Medulla oblongata |
|
|
Name two of the most important ions that influence heart action. |
Calcium (Ca) and Potassium (K) |
|
|
A slow heart rate (below 60 beats a minute) is called _______? |
Bradycardia |
|
|
What is meant by "fibrillation"? |
Rapid, uncontrolled heart contractions |
|
|
What is the name given to the innermost layer of an arterial wall? |
Tunica intima |
|
|
Decreasing the diameter of a blood vessel is called? |
Vasoconstriction |
|
|
What are the smallest blood vessels called? |
Capillaries |
|
|
What are two ways that substances can move through capillary walls? |
Diffusion; filtration; osmotic pressure |
|
|
What type of blood vessel contains valves? |
Veins/venules |
|
|
An inflammation of a vein is called? |
Phlebitis |
|
|
Define "stroke volume" |
The volume of blood discharged from a ventricle with each contraction |
|
|
The friction between the blood and vessel walls is known as? |
Peripheral resistance |
|
|
Blood pressure rises as blood viscosity _______. |
increases |
|
|
What are the two major circulatory pathways? |
Pulmonary and systemic |
|
|
What is the only artery to carry deoxygenated blood? |
Pulmonary artery |
|
|
Where is the mitral valve located? |
Between the left atrium and the left ventricle |
|
|
A drop of blood is in the pulmonary vein. Where does it go next? |
Into the left atria |
|
|
A drop of blood is passing through the tricuspid valve. Where is it going? |
Into the right ventricle |
|
|
A drop of blood is in the right ventricle. Where does it go next? |
Through the pulmonary semilunar valve into the pulmonary arteries. |
|
|
A drop of blood is in the inferior vena cava. Where is it going? |
To the right atrium |
