Parasympathetics GI

The video tutorial covers the parasympathetic innervation of abdominal pelvic organs, detailing the functions, origins, and pathways of preganglionic and postganglionic neurons. It explains the role of the vagus nerve and pelvic splanchnic nerves, highlighting their unique characteristics. The tutorial also discusses neurotransmitters like acetylcholine and their receptors, nicotinic and muscarinic, in the parasympathetic nervous system.

What is one of the primary functions of parasympathetic innervation to the abdominal pelvic organs?

• To inhibit salivary glands

• To decrease digestion

• To increase peristalsis

• To cause muscle contraction

Which nerve is primarily responsible for parasympathetic innervation of the foregut and midgut?

• Vagus nerve

• Optic nerve

• Phrenic nerve

• Sciatic nerve

Where do parasympathetic pathways originate to innervate the abdominal pelvic organs?

• Cerebral cortex

• Cerebellum

• Thoracic spinal cord

• Brainstem and sacral spinal cord

What is unique about the pelvic splanchnic nerves compared to other splanchnic nerves?

• They innervate the foregut

• They are parasympathetic nerves

• They originate from the thoracic region

• They are sympathetic nerves

Which neurotransmitter is used in parasympathetic synapses?

• Acetylcholine

• Norepinephrine

• Serotonin

• Dopamine

What type of receptors does acetylcholine bind to in parasympathetic synapses?

• Histamine receptors

• GABA receptors

• Cholinergic receptors

• Adrenergic receptors

Which of the following is a type of cholinergic receptor involved in parasympathetic innervation?

• Nicotinic receptors

• Alpha receptors

• Dopaminergic receptors

• Beta receptors