Flashcards in Cardiovascular System Deck (51):
What is Heart rate for an untrained athlete at rest
What is heart rate for an untrained athlete at maximal intensity
What is stroke volume for an untrained athlete at rest
what is stroke volume for an untrained athlete at maximal intensity
what is cardiac output for an untrained athlete at rest
what is cardiac output for an untrained athlete at maximal intensity
what is heart rate for a trained athlete at rest
what is heart rate for a trained athlete at maximal exercise
what is stroke volume for a trained athlete at rest
what is stroke volume for a trained athlete at maximal exercise
what is cardiac output for a trained athlete at rest
what is cardiac output for a trained athlete at maximal exercise
What is the main control point for your heart rate
Cardiac Control Centre (ccc)
Where is the CCC found
what does the sympathetic nervous system do?
increase heart rate
What does the parasympathetic nervous system do?
slows heart rate
What does Chemoreceptors detect?
change in CO2 and lactic acid (ph levels)
What does proprioceptors detect?
what does baroreceptors detect?
change in blood pressure
what is in the neural control
chemoreceptors, proprioceptors and baroreceptors
whats in the hormone control
adrenalin and noradrenalin
what does an increase in adrenalin cause
speeds up heart rate
what does vascular mean?
what are the three main blood vessels
Artery's, Capillaries, veins
what are smaller artery's called
what are smaller veins called
why do veins contain valves
to prevent back flow of blood
Pulmonary artery only deal with oxygenated or deoxygenated blood?
what is Venus return
blood returning to the heart c
what aids venus return
pocket valves, smooth muscle
what does vasoconstriction means
blood vessels getting smaller
how does gravity aid Venus return
it helps pull blood down from veins above the heart
what mechanism does the ccc control
vascular shunt mechanism
what does the ccc control
where is blood flow redistributed
what nerves are linked to the pcs or muscular layer of arteriole walls?
what causes veins to contract
the smooth muscles around them
what pump help squeeze blood back to the heart?
skeletal muscular pump
what type of contraction takes place when the skeletal muscular pump squeezes
what pump helps to pull blood back up to the heart during inspiration
while blood is being pulled back to the heart by the respiratory pump is the pressure high or low in the abdomen and thoracic cavity?
low pressure in abdomen and
high in thoracic cavity
what is Sterling's law
stroke volume is dependant on venous return
What does more blood in the atrium cause?
a stretch in the atrium walls
what does the stretch in the atrium wall cause?
what does the increased firing rate of the SA node cause?
an increase in heart rate
what does a increase in heart rate cause for he ventricles?
more blood enters the ventricles
what happens when more blood enters the ventricle
it causes a stretch in the ventricle walls
what does a stretch in the ventricle walls cause?
an increase in EDV
What does an increase in EDV cause
a more forceful contraction of the ventricles
what happens to the esv when the edv increases and a more forceful contraction of the ventricles takes place?
the ESV decreases