cardio 3 - pulmonary circuit and autonomic control of the cardiovascular system

by what control is the heart sped up and slowed down by

parasympathetic and sympathetic

by what control is the blood vessel volume controlled by

sympathetic

what does noradrenaline do to the heart

increases heart rate and contraction

how does noradrenaline increase heart rate

increases influx of sodium for the prepotential so reaches threshold faster

what does noradrenaline do to blood vessels

vasoconstriction

which enzyme results in contraction for the noradrenaline pathway

myosin light chain kinase

which enzyme results in relaxation for the noradrenaline pathway

myosin light chain phosphatase

what factors are involved in blood pressure

cardiac output, total periphery resistance, heart rate, strole volume, filling pressure, contractility, blood volume, venous return

where are the baroreceptors for blood pressure mainly situated

aorta and carotid artery

blood pressure equation

cardiac output\*total periphery resistance

renin - where its found and funtion

kidneys, blood volume maintenance

renin pathway

renin becomes angiotensis I becomes angiotensin II

what is angiotensin

powerful vasoconstriction and releases aldosterone

what do potassium and adenosine act as for blood vessels

paracrine signals and counter vasoconstriction locally

why is there low pressure in the lungs

prevents fluid build build up

low oxygen levels in the lungs result in

vasoconstriction

high oxygen in the lungs result in

vasodilation

adenosine in the lungs results in

vasoconstriction during hypoxia