Science Quiz / GI Nervous System & Motility

Random Science Quiz

QUIZ: Can you name the GI Nervous System & Motility?

Quiz not verified by Sporcle

Forced Order
Score 0/80 Timer 20:00
neurotransmitter of post ganglionic sympathetic fibers
T/F: activation of the enterochromaffin cells leads to release of serotonin which causes the vomiting reflex
T/F: Sympathetic modulation of the distal GI tract occurs through the pelvic splanchnic nerves.
neurotransmitter of post ganglionic parasympathetic fibers
reflex that occurs when there is something in your stomach and efferent signals tell the large intestine to initiate activity
During peristalsis, acetylcholine and substance P at _____ (upstream or downstream) of bolus to initiate contraction.
occurs when the lower esophageal sphincter fails to relax normally due to degeneration of the myenteric and/or dorsal motor nucleus or Vagus nerve
Gastroesophageal Reflus disease occurs because of dysfunction to which structure?
only occurs in the absence of food
2 excitatory neurotransmitters that modulate function of the GI tract
T/F: The Lower esophageal spincter is voluntarily controlled.
Which receptor for serotonin is involved in the vomiting response?
this division of the CNS projects to the GI tract from the medulla and the sacral spinal cord
emesis =
chemoreceptor trigger zone is located in the ___ ventricle
medical term for inability to swallow
a single continuous electrical wave that sweeps one way distally from the stomach that affects all muscles of the GI tract
lower 2/3rds of the esophagus is made of ____ muscle.
the meissner's plexus is located in which layer of the GI tract wall?
T/F; High fat diet, chocolate, peppermint, alcohol and smoking can cause an increase in occurence oif GERD.
upper 3rd of the esophagus is made of ____ muscle
2 inhibitory neurotransmitters that modulate function of the GI tract
T/F: Substances move uniformly through the digestive tract,.
T/F: The change in the electrical potential of the interstitial cells of Cajal translate into the change of smooth muscle contraction of the GI tract.
Which layer of smooth muscle causes segmentation?
The pelvic splanchnic nerves cause contraction of the longitudinal smooth muscle layer and relaxtion of the internal anal sphincter through which type of cholinergic receptor?
T/F the sympathetic nervous system promotes GI function, whereas the parasympathetic nervous system inhibits it.
How frequently does the MMC occur in the absence of food?
T/F: The vasovagal reflex is important in gastric accommodation.
name the 2 ganglia that have sympathetic control of the lower GI tract
t/F: The esophagus, colon, and migrating motor complex have long peristaltic waves, while most peristaltic waves are short
the ____ control of the GI tract arises primarily from the superior cervical ganglion, celiac ganglion, superior and inferior mesenteric ganglia.
stool frequenct of < 3 times per week
controls external anal sphincter
parasympathetic control of the upper GI
Has a transit time of 1 to 5 hours
difficulty swallowing
Where is the MMC initiated?
T/F: Although the enteric nervous system can act autonomously, the central nervous system acts to modulate the activity of the GI tract.
efferents of the vagus nerve arise from which nucleus
The signal from the interstitial cells of Cajal propagates to the smooth muscle cells through which intercellular junctions?
T/F: Activation of nicotinic cholinergic receptors on the myenteric plexus enhance smooth muscle activity
this plexus primarily controls the motility of the GI tract
contraction of this layer of smooth muscle causes a decrease in diameter of the lumen of the GI
arresting the segmentation of the GI tract is known as what?
sphincter important for the initiation of swallowing
t/F: Sensory input from the internal anal sphincter occurs via the pelvic splanchnic nerves.
T/F: The sympathetic nervous system provides a low tonic inhibition of the GI tract, while the parasympathetic has a large influence on promoting GI activity
cells that acts as mediators to modify motor signals among smooth muscle layers and neurons that control motility (submucosal and myenteric plexuses)
This disorder is characterized by heartburn. Occurs due to HCl irritation of esophageal lining
spinal root levels of the parasympathetic control of the lower GI
reflex arc that involves vagus as the afferent input to the CNS as well as the output to enteric nervous system
T/F: Rapid segmentation occurs at the distal end of the GI tract.
During peristalsis, NO and VIP at _____ (upstream or downstream) of bolus to initiate contraction.
has a transit time of 24-48 hours
Which plexus is continuous throughout the GI tract?
/The hypogastric nerve causes _____ (contraction or relaxation) of the internal anal sphincter through a adrenergic receptors.
Important for keeping the GI tract clear of harmful bacteria or residual foodstuffs in the absence of food
plexus primarily controls secretion and blood flow. It also receives sensory information from chemo and mechano receptors
sensory input from the stomach upto the emetic center of the brain occurs primarily via the ____ nerve.
stool frequency of > 3 times pre day
autonomous nervous sytem within the wall of the GI tract that controls secretions, motor activity, sphincters and blood vessels
Vagovagal reflex from stomach that tells the small intestine to contract
cells that serve as pacemaker cells,which regulate membrane potential of BER
located between the circular and longitudinal smooth muscle layers
T/F: The hypogastric nerve provides inhibitory input (via a adrenergic) to circular smooth muscle layer and stimulatory input to the longitudinal layer of the GI
The gastrocolic reflex is mediated via which nerve (efferent limb)?
Which 2 nervous controls are important for gastric accommodation?
T/F: Substance P and acetylcholine act to modulate GI function by inducing hyperpolarization in the post-synaptic cells of the GI.
contraction of this layer of smooth muscle causes a shortening of a segment of the GI tract
T/F: Adaptive relaxation accounts for the stomach's ability to accommodate an increase in volume without a change in pressure.
are mesenchymal non-neuronal tissue of origin
Which hormone is responsible for inducing vomiting?
T/F: The internal anal sphincter receives both sympathetic and parasympathetic innervation
When threshold is reached in the interstitial cells of Cajal, voltage gated ___ channels are opened, initiating depolarization, in the smooth muscle.
Which cells release serotonin to induce vomiting?
Which structure maybe involved in dysphagia
T/F:At least 50% of stomach contents are released in 24-48 hours.
name the 2 ganglia that are responsible for sympathetic control of the upper GI
What hormone is involved in initiating the MMC?

You're not logged in!

Compare scores with friends on all Sporcle quizzes.
Sign Up with Email
Log In

You Might Also Like...

Show Comments


Top Quizzes Today

Score Distribution

Your Account Isn't Verified!

In order to create a playlist on Sporcle, you need to verify the email address you used during registration. Go to your Sporcle Settings to finish the process.