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20 Cards in this Set
- Front
- Back
av valve between left atrium and left ventricle
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bicuspid (mitral) valve)
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av valve btw right atria and rt ventricle
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tricuspid
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diastole
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ventricles relaxed and blood is able to flow into them from the atria,
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what causes av valves to slam shut?
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at the end of diastole, ventricles contract initiating systole
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systole
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period of time which ventricles are contracting beginning at lub and ending at dub
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end of systole
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ventricles nearly empty, stop contracting, pressure falls and blood begins to flow backward from pulm artery to right ventricle and aorata to left ventricle (but semilunar valves slam shut when pressure in the ventricles become lower than pressure in the great arteries)
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lub
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closure of av valves at beginning of systole
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dub
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sound of semilunar valves closing at the end of systole
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ach
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inhibits depolarization by binding to receptors on the sa node
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blood pressure
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systemic arterial pressure
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thrombin
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converts fibrinogen into fibrin when bleeding occurs, causing a scab
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albumin
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maintains plasma osmolarity, termed oncotic pressure
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dorsal root ganglion
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a bunch of somatic sensory cell bodies located just dorsal (back of) the spinal cord
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preganglionic neuron
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cell body in brainstem or spinal cord
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postganglionic neruron
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sends an axon to an effector(smooth muscle or gland)
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sympathethic preganglionic efferent neurons
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cell bodies in thoracic or lumbar regions of spinal cord
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parasympathethic preganglionic neurons
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cell bodies in cranial or sacrial region of spinal chord....PARA LONG PRE
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sypathethic ganglia
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close to spinal chord, far from target, so long axon
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parasympathethic ganglia
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far from chord, close to target so short axon
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dilation of blood vessels in dermis
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cuataneous vasodilation, results in heat loss by conduction
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