Regulation of gastrointestinal function

1. Which of the following conditions in the gut would not provide direct sensory input to the ENS?

changes in the rate of ingesta flow
changes in luminal pressure resulting in changes in tension of gut wall musculature
changes in luminal pH
changes in luminal osmotic pressure

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cells arranged into discrete glands situated between the circular and longitudinal muscle layers
cells distributed diffusely throughout the submucosa of the GIT
cells distributed diffusely throughout the mucosa of the GIT
cells arranged into small islets in the intestinal submucosa

intrinsic neuronal fibres transverse the length of the stomach and intestine in discrete nerve bundles
intrinsic neuronal fibres exist only in the longitudinal muscle layer of the stomach and intestine
intrinsic neuronal cell bodies lie in discrete planes within the thickness of the gut wall and are diffusely distributed throughout its length
intrinsic neuronal fibres and their cell bodies are diffusely spread throughout the length and thickness of the stomach and intestine

secretory activity is influenced by the luminal contents of the gut
each GI endocrine cell can produce many different types of hormones depending on the stimulus applied to it
hormones are secreted directly into the gut lumen and affect the activity of glands downstream from the point of secretion
the secretory products of the GI endocrine cells are steroid hormones