Flashcards in Wk4 Autonomic Nervous System Deck (20):
What is ganglion
No, it's not a gang of lions
It's a collection of nerve cell bodies outside the CNS
It's the junction between nerve cells
And what's a neurotransmitter
It's the chemical released at synapse and it sounds totally bad ass.
Define the autonomic nervous system
So, each moment, signals flood from sensory organs into the cns, and the autonomic nerves make adjustments necessary to best support body activities
What are some body activities that the ANS may help support
Blood flow, heart and breathing and blood pressure
Define the differences between parasympathetic and sympathetic
Parasympathetic- craniosacral origin "rest and digest" so me rn.
Sympathetic- thoracolumbar origin "fright, fight or flight"
What is the ans controlled by
By the hypothalamus and medulla onlongata
The ans co ordinates visceral effectors such as ________, _______, ________, _________
Urinary and reproductive
So what are the 2 divisions of the ans
Parasympathetic and sympathetic
If I was terrified of ugly cockroaches and one ran over my foot, what involuntary responses might my body have
Become super alert, metabolic rate, and muscle function would increase, heart rate and blood pressure would increase.
And a decrease in my GIT and urinary functions might occur.
What is autonomic tone
Resting level of spontaneous autonomic activity
When it comes to the structure of ans , the peripheral motor paths have how many consecutive motor fibres?
Is the first fibre pre or post synaptic?
It's pre synaptic
And synapses at the ganglion
In the parasympathetic division- Pre ganglionic fibres are short
True or false
They are long and post ganglionic fibres are short.
Nerves that release the neurotransmitter acetylcholine are generally known as __________ _______, and those that release noradrenaline are called ______ ________.
Nerves that release the neurotransmitter acetylcholine are generally known as CHOLINERGIC NERVES and those that release noradrenaline are called ADRENERGIC NERVES.
Normally all parasympathetic nerves discharge acetylcholine (ACh) and nearly all postganglionic sympathetic nerves release noradrenaline (NAd)
True or false
The neurotransmitter ACh is always the first synapse outside the spinal cord
TRU or false
The first receptor is always WHAT
Nicotinic (gin n tonic)
The second receptor is WHAT