Question

Define Medical Terminology

1. Afterload
2. Atrioventricular node (AV node)
3. Automaticity
4. Autoregulation
5. Capillary
6. Cardiac cycle
7. Cardiac output
8. Coronary artery
9. Depolarization
10. Diastole
11. Diastolic blood pressure
12. Ejection fraction
13. Epinephrine
14. Inferior vena cava (pl., cavae)
15. Inotropic agents
16. Laplace law
17. Left coronary artery (LCA)
18. Left heart
19. Left ventricle
20. Lymph

Answer 1

Afterload is the pressure against which heart has to work to eject blood during systole.

Atrioventricular node(AV node): is the electrical relay station between the upper and lower chambers of the heart.

Automaticity: is defined as the ability of heart cells to spontaneously depolarize and generate an action potential.

Autoregulation is defined as the intrinsic ability of an organ to maintain a constant blood flow despite changes in perfusion pressure.

Capillary is the smallest blood vessels in the body with a diameter of 5-10micrometer they convey blood between arterioles and venules

Cardiac cycle is defined as the sequence of alternating contraction and relaxation of the atria and ventricle in order to pump blood throughout the body.

Cardiac output is defined as the amount of blood pumped out by the heart throughout the circulatory system in a minute.

Coronary artery is the network of blood vessels that arises from aorta to supply oxygen rich blood to heart muscles.

Depolarization is a change within a cell, during which the cell undergoes a shift in electric charge distribution resulting in less negative charge inside the cell.

Diastole defined as the time period when the heart is in the state of relaxation and dilatation.

Diastolic blood pressure is the pressure in the arteries when the heart rests between the beats.

Ejection fraction is the amount of blood pumped out by the ventricles during each beat.

Epinephrine is the hormone secreted by the adrenal medulla due to stimulation by central nervous system in response to stress.

Inferior vena cava is the largest vein of the body which carry blood from the lower extremities, pelvis and abdomen to the right atrium of the heart.

Ionotropic agent is the medicine that alter the force or nergy of muscular contractions.

Laplace law states that the tension within the wall of sphere filled to a particular pressure depends on the thickness of the sphere

Left coronary artery is the one of two coronary arteries that supply blood to the heart muscle.

Left heart is defined as the syndrome in which left side of the heart is severely underdeveloped congenitally.

Left ventricle is the thickest chamber of the heart that is responsible for pumping oxygenated blood to tissues all over the body.

Lymph is the colourless fluid, containing infection-fighting white blood cells, that flows through the lymphatic system