Hemodynamics
Do active cells need more or less blood per minute?
more
What is the most common unit to measure pressure, especially to measure blood pressure?
mmHg
A fluid does not ____ when the pressure is the same throughout?
flow
If emotions is a factor involving heart reflexes, what would happen to my heartrate if I was scared?
increases
Whats a factor that affects the strength of myocardial contractions
mechanical , neural , and chemical factors
Hemodynamics are the mechanisms that keep _____ flowing
blood
The primary fluid flow principle derives from?
Issac Newton
Arterial blood pressure is directly or indirectly proportional to atrial blood volume
directly
If blood temperature is a factor involving heart reflexes, what would happen to my heartrate if I were cold?
it would decrease
a greater stretch of the heart's muscle fibers leads to....
stronger contraction
is there more than one circulation?
yes
What part of the heart does deoxygenated blood enter from?
Right atrium
high pressure in the arteries must be _________ to keep blood flowing through the cardiovascular systems
maintained
If the chrono means time and tropic means change or influence, what does the word chronotropic mean in terms of the heart?
Anything that influences or change the timing of the heart
Norepinephrine, released by sympathetic nerve fibers, and epinephrine, released into the bloodstream from the adrenal medulla, both increase what?
the strength of heart contractions.
What is the large functions that many mechanisms work together to do?
circulation
What part of the heart pumps the oxygenated blood?
Left ventricle
how much percent cardiac reserve is in a young adult?
300 to 400%
What out of these 3 hormones is most noted as a cardiac accelerator ( Insulin, Adrenaline, Estrogen)
adrenaline
if to much blood stretched beyond the heart critical point they lose their what?
elasticity
what are the 2 functions for controlling mechanisms for circulation
keep blood flowing and vary volume of blood circulated
What’s an example of a normal blood pressure?
mmHg 120
which two factors are directly proportional to blood volume
cardiac output and peripheral resistance
If the hypothalamus is a small region of the brain that regulates bodily functions , what are examples of those bodily functions?
Breathing , walking, digestion, respiration
what would happen if more blood returned to the heart?
the more stretched their fiber would be