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23 Cards in this Set
- Front
- Back
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the parasympathetic nervous system responds ________ to changes in blood pressure by.... |
immediately changing HEART RATE |
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Increasing SNA causes: |
vascular smooth muscle contraction (vasoconstriction) |
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changing the slope of the arterial baroreflex curve relationship changes the... |
sensitivity of the sympathetic nervous system |
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_____ changes throughout the day but _____ remains steady |
heart rate blood pressure |
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Which neurons of the ANS have an adrenergic primary postsynaptic receptor |
sympathetic postganglionic |
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What is the primary neurotransmitter for sympathetic postganglionic neuron? |
Norepinephrine/ noradrenaline |
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Are sympathetic and parasympathetic postganglionic axons myelinated/non myelinated? |
Non myelinated |
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every smooth muscle in arterioles have a ____ |
varicosity |
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what do varicosities do? |
release the neurotransmitter that causes vasoconstriction of smooth muscle |
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The RVLM is a major site of.... |
projections to sympathetic preganglionic neurons located in the spinal cord |
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where are sympathetic preganglionic neurons located in the spinal column? |
The intermediolateral cell column - gives rise to sympathetic postganglionic nerves innervating various organs. |
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primary postsynaptic receptor for symp and parasymp preganglionic neurons is: |
nicotinic |
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the primary postsynaptic receptor for parasymp postganglionic neuron is: |
muscarinic |
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cardiovascular control cell groups receive input from higher centre regions such as: |
1. periaquaductal grey 2. paraventricular nucleus of the hypothalamus 3. lateral hypothalamic area |
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sympathetic activity has: |
rhythmicity- cardiac, respiratory |
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blood pressure is a result of ______ response of the smooth muscle |
myogenic response |
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sympathetic activity to the heart, vasculature, other organs etc is a ______ response |
neurogenic response |
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What receptor is associated with somatic motor pathway? |
nicotinic receptor |
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what are the 3 autonomic pathways? |
1. sympathetic pathway 2. parasympathetic pathway 3. adrenal sympathetic pathway |
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Autonomic effectors: |
smooth and cardiac muscle some endocrine and exocrine glands some adipose tissue |
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What is norepinephrine |
hormone secreted by the adrenal medulla and also a neurotransmitter found at nerve endings in the SNS |
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The primary NT of sympathetic preganglionic nerve is ______, whereas it is _____ in the sympathetic postganglionic nerve. |
symp preganglionic- Ach symp post ganglionic- Norepinephrine |
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Where are parasympathetic preganglionic cell bodies found? |
Brainstem and sacral spinal cord |
