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