time to transfer #1 Flashcards
what is asthma?
a condition that reduces the flow of air into and out of his lungs due to inflammation and constriction of his bronchioles
true or false: current has an indirect relationship with voltage
fasle: direct
what is current (I) measured by?
amps
what is Ohm’s law for electricity and fluid??
I = ΔV/R
flow = ΔP/R
electrical current flowing from the power source (e.g., battery) through the circuit ___________ substantially when the resistance is high
decreases
current _________ when resistance in the circuit is small, as occurred when the diameter of the wire was large.
increases
what is ΔP along the respiratory tract analogous to?
ΔV in an electrical current
what is restinance (R) to airflow within the respiratory tract analogous to?
resistance in electrical circuit
how can the relationship among airflow (F), the pressure gradient and resistance can be summarized by?
F = ΔP/R, just like the I = ΔV/R relationship for the electrical current
describe how your brother’s airflow is affected by the resistance in his airway
inversely; his airflow decreases when there is more resistance, which is when he wheezes, while his airflow increases as the resistance decreases after the medication has dilated his bronchioles
what happens to the bronchioles during an asthmatic crisis?
his bronchioles constrict and inflammatory mucus accumulates within them. Collectively, these increase resistance which decreases his airflow.
what is the flow of fluid (F) directly related to?
change in pressure
what is F inversely related to?
resistance
the right coronary artery splits into two branches, one of those being the posterior descending artery. what is the function of it?
provides arterial blood to the muscular walls of the right side of the heart
The right side of the heart pumps ________________ blood returning from the body to the lungs, where it becomes oxygenated.
deoxygenated
what does the left coronary artery split into?
left anterior descending artery and the circumflex artery
what is the purpose of the circumflex artery?
supplies part of the left side of the heart
what is the purpose of the left anterior descending artery?
supplies the rest of the heart
what is the function of the left ventricle?
deliver oxygenated blood to the body
what causes heart attack?
abrupt occlusion of the left anterior descending artery results in loss of blood supply to much of the left side of the heart
what is atherosclerosis?
build up of plaque on the inside of his arteries that narrows the lumen of the vessel. These plaques increase the resistance to the flow of blood in affected arteries, which decreases the flow of blood to the heart muscle.
the flow of blood is directly related to what and inversely related to what?
change in pressure
resistance within the vessel
