Learning objectives. Classify the components of enteric nervous system Discuss the location and significance of myenteric plexus. Describe the Meissner s plexus Differentiate between myenteric and Meissner s plexuses Explain the role of sympathetic & parasympathetic nervous system in controlling. GIT function. Enlist the gastrointestinal reflexes & explain. the functions of these reflexes. Explain the mechanism of developing slow wave Explain the mechanism of developing spike potential Enlist the factors that depolarize & hyperpolarize the GIT membrane. Enlist the excitatory & inhibitory neurotransmitters of enteric nervous system Enlist the hormones acting on GIT, their stimuli, site of release and actions Discuss the effect of gut activity and metabolic factors on GIT blood flow/ Splanchnic circulation Explain the nervous control of GIT blood flow/Splanchnic circulation Trace the reflex arc of mastication Explain the process and importance of chewing reflex. Enlist the stages of swallowing. Describe the mechanism of voluntary stage of swallowing
| # | Objective | Section |
|---|---|---|
| 1 | Components of ENS | §1 |
| 2 | Location and significance of myenteric plexus | §2 |
| 3 | Meissner's plexus | §3 |
| 4 | Myenteric vs. Meissner's comparison | §4 |
| 5 | Sympathetic & parasympathetic control of GIT | §5 |
| 6 | GIT reflexes — types and functions | §6 |
| 7 | Mechanism of slow wave development | §7 |
| 8 | Mechanism of spike potential development | §8 |
| 9 | Factors depolarizing/hyperpolarizing GIT membrane | §9 |
| 10 | Excitatory and inhibitory neurotransmitters of ENS | §10 |
| 11 | GIT hormones — stimuli, sites, actions | §11 |
| 12 | Gut activity and metabolic factors on GIT blood flow | §12 |
| 13 | Nervous control of splanchnic circulation | §13 |
| 14 | Reflex arc of mastication and its importance | §14 |
| 15 | Stages of swallowing | §15 |
| 16 | Mechanism of voluntary stage of swallowing | §16 |
Describe the light microscopic structure of; 1. Lips 2. Tongue including lingual papillae and taste buds 3. Oral Cavity (Cheeks, Teeth gums, hard & Soft palate) Describe the histological structure of parotid, Submandibular and sublingual glands. Compare and contrast the histological structures of parotid, submandibular and sublingual glands. Describe the serous and mucous acini and give histological differences between the two. Describe the structure and location of serous demilunes. Describe histology of oropharynx Relate the characteristics of various layers of GIT with their function
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