GI System: Deglutition and Large intestine

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M/C quiz for studying BMSC 208

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Ervine Santiago

Canada

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GI System: Deglutition and Large intestine


GI System: Deglutition and Large intestineVersion en ligne M/C quiz for studying BMSC 208 par Ervine Santiago 1 Deglutition moves from food to oral cavity(stomach): mouth->Pharynx->Esophagus->stomach: a True b False c d 2 What are the phases of Deglutition: Choose one or more answers a Voluntary Phase b Pharyngeal Phase c Esophageal phase d 3 What happens in the Voluntary phase: hint: Bolus moistened food Choose one or more answers a i)tongue movement against the palate b ii)Bolus to the back of Oral Cavity into the Orpharynx c iiI)Uvula movement while swallowing d both I) and II) 4 (Pharyngeal phase) is also called what a involuntary stage b secondary voluntary stage c pharyngeal swallowing stage d Esophageal stage 5 (Pharyngeal phase) The bolus activates what and triggers what reflex? Choose one or more answers a Activates Pressure receptors in oropharynx by sending impulses to brain stem( (deglutition center in medulla and lower pons) b Activates salivary receptors in salivary glands c triggers swallowing reflex d triggers acid reflux 6 (Pharyngeal phase) what cause closing of Nasopharynx and prevents what? Choose one or more answers a by soft palate and uvula upward movement b by tongue movement c Prevents swollowed from entering nasal cavity d Prevents swallowed from entering esophagus 7 (Pharyngeal phase) The epiglottis prevents food from(bolus) entering the respiratory tract by how. a by closing off the opening to the larynx b by perstalsis c by segmental contractions d none of the above 8 (Pharyngeal phase) When the bolus moves through the oropharynx and laryngopharynx, when does it move through the Upper Esophageal sphincter. a When the UES relaxes because it has the highest resting pressure b when the LES relaxes because it has the highest resting pressure c When the UES contracts d when the LES contracts 9 (Esophageal phase) starts by Bolus entering the esophagus. What is the main process for which the bolus moves. a Peristalsis b Segmental contractions c Diffusion d Swallowing 10 (Esophageal phase) which muscles control the peristalsis movement of the bolus. a Circular muscle fibers- superior to bolus b Longitudinal- Inferior to bolus c Circular muscle fibers- Shorten esophageal wall, squeeze bolus towards stomach d Longitual- shortens inferior section, pushes its wall outward to receive bolus e All of the above 11 (Esophageal phase) when bolus reaches the LES from repeated peristaltic movement, how long does semi-solid and soft food reach the stomach Choose one or more answers a 4-8 seconds for semi solid b 1 second for soft c 10 seconds for semi solid d 12 seconds for soft 12 (Esophageal phase) Failure of closure of LES. (failure of contraction) after (relaxation to allow food into food into stomach) Choose one or more answers a reduces LES pressure b Gastreosphageal reflex (GERD)- acid -> esophagus c increases LES pressure d Swallowing reflex 13 (large intestine) time for material to pass through here: hint a 18-24 hours b 3-5 hours c 10 hours d 6 hours 14 (large intestine) main secretion of colon a mucus-by goblet cells b enzymes c inhibin d progesterone 15 (large intestine) Proximal half of colon absorbs a Electolytes b Water c Vitamin K by bacteria d ALl of the above 16 (large intestine) why is HCO3- secreted a neutralize Acid produced from colic bacteria b Digest proteins c absorb fat d increase motility 17 (large intestine) Colonic bacteria break down cellulose into sugar a True b False c d 18 (large intestine) The distal half of the colon is storage site for feces a True b False c d 19 (large intestine) Gastrocolic is triggered by: a Food entering stomach b Food entering small intestine c food entering duodenum d food entering colon 20 (large intestine)Duodencolic reflex is triggered by: a triggered by Chyme entering duodenum b triggered by food in stomach c Colon distension d Hormones 21 (large intestine) Colonic reflex is a response to distension of colon which acitvates enteric plexus a True b false c d 22 (large intestine) Gastrocolic, duodenocolic and colonic reflex triggers mass movment of chyme into colon. a True b False c d 23 (large intestine)how many times a day do Perstaltic wave occur in the colon. And when is it most common Choose one or more answers a 3-4 times a day b once a day c common 15 min after breakfast which persit for 10 to 30 minutes d common after 1 hour after breakfast which persist for 20 min 24 (large intestine) Defecation reflex is triggered by and gives rise to Choose one or more answers a triggered Distention of colon b triggered by Hunger c Activates enteric plexus giving rise to local reflex d activates hormonal enzymes giving rise to digestion of proteins 25 (large intestine) what does the local spinal reflex cause Choose one or more answers a weak contractions of the rectum b Relaxation of internal anal sphincter c strong contractions of rectum d relaxation of external anal sphincter 26 (large intestine) Contraction of the external anal spincter (under consious cerbral control) inhibits what Choose one or more answers a Involuntary movement of feces b feces being forced out of the the rectum through anal opening c Voluntary movement of feces d Feces smoothly move through rectum and through anal opening 27 (large intestine) what is correct about the internal and external anal sphincter: a Internal-relaxatino of smooth muscle b Internal- parsymapthetic(involuntary) c External- Relaxation (consioiously) of skeletal muscle d External- somatic (voluntary) e All of the above

GI System: Deglutition and Large intestine

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GI System: Deglutition and Large intestineVersion en ligne

par Ervine Santiago

Deglutition moves from food to oral cavity(stomach): mouth->Pharynx->Esophagus->stomach:

What are the phases of Deglutition:

What happens in the Voluntary phase: hint: Bolus moistened food

(Pharyngeal phase) is also called what

(Pharyngeal phase) The bolus activates what and triggers what reflex?

(Pharyngeal phase) what cause closing of Nasopharynx and prevents what?

(Pharyngeal phase) The epiglottis prevents food from(bolus) entering the respiratory tract by how.

(Pharyngeal phase) When the bolus moves through the oropharynx and laryngopharynx, when does it move through the Upper Esophageal sphincter.

(Esophageal phase) starts by Bolus entering the esophagus. What is the main process for which the bolus moves.

(Esophageal phase) which muscles control the peristalsis movement of the bolus.

(Esophageal phase) when bolus reaches the LES from repeated peristaltic movement, how long does semi-solid and soft food reach the stomach

(Esophageal phase) Failure of closure of LES. (failure of contraction) after (relaxation to allow food into food into stomach)

(large intestine) time for material to pass through here: hint

(large intestine) main secretion of colon

(large intestine) Proximal half of colon absorbs

(large intestine) why is HCO3- secreted

(large intestine) Colonic bacteria break down cellulose into sugar

(large intestine) The distal half of the colon is storage site for feces

(large intestine) Gastrocolic is triggered by:

(large intestine)Duodencolic reflex is triggered by:

(large intestine) Colonic reflex is a response to distension of colon which acitvates enteric plexus

(large intestine) Gastrocolic, duodenocolic and colonic reflex triggers mass movment of chyme into colon.

(large intestine)how many times a day do Perstaltic wave occur in the colon. And when is it most common

(large intestine) Defecation reflex is triggered by and gives rise to

(large intestine) what does the local spinal reflex cause

(large intestine) Contraction of the external anal spincter (under consious cerbral control) inhibits what

(large intestine) what is correct about the internal and external anal sphincter: