Podcast
Questions and Answers
Which type of smooth muscle cells in the GIT are responsible for generating slow wave potentials?
Which type of smooth muscle cells in the GIT are responsible for generating slow wave potentials?
- Pacemaker cells
- Autorhythmic cells (correct)
- Contractile cells
- Interstial cells
What is the primary function of autorhythmic cells in the GIT?
What is the primary function of autorhythmic cells in the GIT?
- To regulate the frequency of spike potentials
- To generate action potentials
- To generate slow wave potentials (correct)
- To contract the smooth muscle
What is the effect of an increase in the frequency of spike potentials on the amplitude of GIT smooth muscle contraction?
What is the effect of an increase in the frequency of spike potentials on the amplitude of GIT smooth muscle contraction?
- It decreases the amplitude of contraction
- It has no effect on the amplitude of contraction
- It increases the amplitude of contraction (correct)
- It varies depending on the location in the GIT
What is the effect of acetylcholine on the GIT motility?
What is the effect of acetylcholine on the GIT motility?
What is the role of Ca2+ channels in the slow wave potentials?
What is the role of Ca2+ channels in the slow wave potentials?
What is the effect of the ENS, ANS, and hormones on the amplitude of slow wave potentials?
What is the effect of the ENS, ANS, and hormones on the amplitude of slow wave potentials?
What is the characteristic of smooth muscle cells that allows them to contract in unison?
What is the characteristic of smooth muscle cells that allows them to contract in unison?
What is the primary function of the splanchnic circulation?
What is the primary function of the splanchnic circulation?
Which type of transport requires energy and involves transporters?
Which type of transport requires energy and involves transporters?
What is the main site of absorption of major nutrients?
What is the main site of absorption of major nutrients?
What is the movement of products of digestion from the lumen of the gut into the bloodstream or lymph?
What is the movement of products of digestion from the lumen of the gut into the bloodstream or lymph?
What type of smooth muscle cells produce the opposite effects of adrenaline and noradrenaline?
What type of smooth muscle cells produce the opposite effects of adrenaline and noradrenaline?
What is the primary function of the motor neurons in the myenteric plexus?
What is the primary function of the motor neurons in the myenteric plexus?
What is the estimated number of neurons in the enteric nervous system?
What is the estimated number of neurons in the enteric nervous system?
What is the primary function of the interneurons in the enteric nervous system?
What is the primary function of the interneurons in the enteric nervous system?
Where is the submucosal plexus, also known as the plexus of Meissner, located?
Where is the submucosal plexus, also known as the plexus of Meissner, located?
Which of the following is NOT a component of the enteric nervous system?
Which of the following is NOT a component of the enteric nervous system?
What is the name of the plexus located between the longitudinal and circular smooth muscle layers of the muscularis externa?
What is the name of the plexus located between the longitudinal and circular smooth muscle layers of the muscularis externa?
Where are the preganglionic sympathetic neurons that supply the GIT localized?
Where are the preganglionic sympathetic neurons that supply the GIT localized?
Which ganglion innervates the small intestine and the proximal part of the large intestine?
Which ganglion innervates the small intestine and the proximal part of the large intestine?
What is the effect of stimulation of sympathetic nerves on the GIT?
What is the effect of stimulation of sympathetic nerves on the GIT?
Which of the following is an example of a GIT reflex?
Which of the following is an example of a GIT reflex?
Where do the postganglionic sympathetic fibers synapse in the GIT?
Where do the postganglionic sympathetic fibers synapse in the GIT?
Which of the following emotions may slow digestion?
Which of the following emotions may slow digestion?
What is the primary function of secretin in the gastrointestinal tract?
What is the primary function of secretin in the gastrointestinal tract?
Which of the following hormones is produced by I cells in the duodenum and jejunum?
Which of the following hormones is produced by I cells in the duodenum and jejunum?
What is the primary function of histamine in the gastrointestinal tract?
What is the primary function of histamine in the gastrointestinal tract?
Which of the following is a characteristic of paracrine agents in the gastrointestinal tract?
Which of the following is a characteristic of paracrine agents in the gastrointestinal tract?
What is the primary function of somatostatin in the gastrointestinal tract?
What is the primary function of somatostatin in the gastrointestinal tract?
What is the primary function of glucose-dependent insulinotropic peptide (GIP) in the gastrointestinal tract?
What is the primary function of glucose-dependent insulinotropic peptide (GIP) in the gastrointestinal tract?
