The pharyngeal phase of Swallowing:

Is associated with lowering of the soft palate.

Involves closure of larynx by the vocal cord.

Is associated with lowering of the soft palate.

Is accompanied by deep inspiration.

Deglutition (Swallowing):

Is an automatic function of smooth muscle.

Is a complicated act requiring the precise coordination of many muscle group.

Is an automatic function of smooth muscle.

Is associated with a lowering of hard palate to prevent reflux of food into the nasopharynx.

Does not require relaxation of cricopharyngeal muscle.

So-called hunger pangs :

May occur in a totally vagotomized patient.

Are truly due to smooth muscle spasm of the transverse colon.

Are associated with esophageal and pyloric contraction that coexist with an empty relaxed stomach.

Are more common if starvation is associated with hypoglycaemia.

May occur in a totally vagotomized patient.

All the following are correct statements about pancreatic secretion except:

HCO3 rich fluid is secreted by ductal cells in response to secretin .

Secretion of enzymes by acinar cells occurs in response to CCK.

Vagotomy augment secretion of enzymes after meal .

The gastric juice has all the following characteristics except:

It contains an alkaline secretion from the surface epithelium

It contains the intrinsic factor which is essential for vit.B absorption

It s antibacterial action is produced by its mucous content

All the following are true about liver functions except:

Liver cells are the only important site for plasma albumin synthesis.

Liver cells can store vitamin B12.

Liver cells inactivates certain hormones by conjugation.

Essential fatty acids are synthesized in liver.

All the following statements are correct about liver cells except:

They form non essential amino acids.

They form hippuric acid by conjugation of benzoate with glycine.

Hydrochloric acid secretion:

Is accomplished by passive diffusion.

Requires the dissociation of water with subsequent exchange of the hydrogen ion for potassium ion.

Utilize protein molecules to neutralize OH remaining in the secretory cells.

Is accelerated by presences of fat or hypertonic solutions in the duodenum.

Is normally completed about 9 hours after ingestion of a usual meal.

Is slowest if the food is soft and rich in carbohydrates.

Is inhibited by excessive acidity in the duodenum.

Is accelerated by presences of fat or hypertonic solutions in the duodenum.

Select a single incorrect answer about Swallowing:

Reflex apnea occurs during the pharyngeal phase.

the buccal phase of swallowing is voluntary.

Food is prevented from entering the nose during swallowing by elevation of epiglottis.

Under the normal conditions, the bulk of gastric secretions are produces:

After the food has entered the duodenum.

Before the food is ingested and while the pleasure of it s ingestion is anticipated

While the food stays in the stomach.

After the food has entered the duodenum.

Pepsin, secreted by the gastric mucosa:

Doesnot increased in concentration in response to the mental stimuli found in the so called cephalic phase of gastric digestion

Continues to act in the neutral medium of the duodenum.

Is proteolytic on the mucosal surface, in the alkaline medium provided by the mucus secreted by the surface cells of the stomach.

Is synthesized within the chief cells.

Doesnot increased in concentration in response to the mental stimuli found in the so called cephalic phase of gastric digestion

Which of the following is the major factor that protects the duodenal mucosa from the damage by gastric acid?:

The endogenous mucosal barrier of the duodenum.

Pancreatic bicarbonate secretions.

The endogenous mucosal barrier of the duodenum.

Duodenal bicarbonate secretion,

The act of Swallowing is associated with:

Concurrent inhibition of respiration.

Movement of food into the nasopharynx.

upper esophageal sphincter constriction when food placed in contact with the anterior pillars of the pharynx.

Resting anal pressure is mainly due to :

Tone of the puborectalis muscle.

Tone of external anal sphincter

Tone of the internal sphincter.

Tone of the puborectalis muscle.

The pangs associated with hunger :

Usually appear 3 to 4 hour after fasting begins.

Are decreased a low level of blood sugar.

Are accompanied with feeling of hunger and pain in the pit of the stomach.

Usually appear 3 to 4 hour after fasting begins.

diminish after 1 to 2 days of starvation.

Select a single incorrect answer about pancreatic secretion.

Trypsinogen is activated by enterokinase.

Chymotrypsinogen is activated by trypsin

Pancreatic lipase is activated by alkaline pH.

May be accompanied by a fall in arterial blood pressure

Leads to expulsion of gastric contetnts by violent rhythmic contractions of gut smooth ms.

Is coordinated by a mid-brain vomiting center

Of green fluid suggests that duodenal contents have regurgitated into the stomach

May be accompanied by a fall in arterial blood pressure

As regards the process of vomiting:

Its is controlled by a center in the cerebral cortex

Prolonged vomiting usually produces dehydration associated with acidosis

It s associated with relaxation of the body and fundus of the stomach

The cephalic phase of gastric secretion :

Isnot blocked by injection of atropine.

Occurs when food reach the stomch.

Isnot accompanied by release of GRP.

Is controlled by the vagi nerves.

Isnot blocked by injection of atropine.

The following statements about gastric secretion are correct except:

Gastric secretion increases when a hungry person thinks about food

Gastric secretion helps vit.B absorption

Production of HCl depends on activity of carbonic anhydrase

Gastric secretion is associated with increased H concentrarion in venous blood coming from stomach

hich of the following statements about gastric secretion is incorrect:

Gastric acid secretion can be inhibited by somatostatin

The main phase of gastric secretion is the gastric phase

Gastric secretion increases in response to the presence of food in mouth after the vagi to stomach have been cut

Under normal condition, the gastric secretion is:

Not affected by presence of food in the stomach.

Stimulated by norepinephrine and inhibited bu curare.

Increased by distention of the stomach.

Select a single incorrect answer about vomiting:

The role of stomach is passive in the process of vomiting

Vomiting center is in hypothalamus

The role of stomach is passive in the process of vomiting

Vomiting may occur as a conditioned reflex

Mass movement in the colon would be abolished by:

Destruction of the intrinsic nerve plexus.

Vitamin B12 absorption :

Depends on presence of intrinsic factor.

The following statements about pancreatic secretion are false except:

Pancreatic acini contain trypsin.

Vagal stimulation produces HCO3 rich juice.

The hormone which stimulates enzyme _ rich secretion also causes contraction of gall bladder.

Concerning HCl secretion, all the following is true except:

The energy required is derived from ATP breakdown

It s associated with increased PH of the gastric venous blood

It s stimulated by gastrin, acetylcholine,histamine and norepinephiren

The energy required is derived from ATP breakdown

It involves formation of carbonic acid

Mucous presents on the surface of the mucosa of the stomach,smal and large intestine is:

Alkaline, and thus a poor buffer for alkaline foods.

Resistant to enzymes secreted into the lumen of the gastrointestinal tract.

Alkaline, and thus a poor buffer for alkaline foods.

Easily removed from the surface of the stomach by the gastric secretions during the gastric phase of digestion.

Gastric HCL secretion :

Is a passive process that occurs in all parts of the stomach.

Is stimulated by somatostatin,cimetidine & pyrenzepine.

Is inhibited by histamine,gastrin & acetylcholine.

plays a significant rule in iron absorption.

Saliva is characterized by all the following except:

Its Na+&Clconcentration are lower than those in plasma.

Its concentration of K+ is the same as that in plasma.

Its Na+&Clconcentration are lower than those in plasma.

Its osmotic pressure and PH are lower than their corresponding values in plasma.

It exerts antibacterial action.

Gastric secretion is inhibited by all the following except:

Certain emotions e.g. fear and depression

Presence of excess H in the pyloric antrum

Presence of excess protein digestive products in the stomach

Certain emotions e.g. fear and depression

Certain GIT hormones e.g. secretin,CCK and VIP

A likely reason why a to and fro motion, such as that encountered during airplane flights or in an automobile ride over a bumpy road, tends to cause nausea and vomiting, is because during such motions:

Much air is swallowed and the stomach becomes distended

The stomach is more likely to develop reverse peristalsis

The cerebral cortex can no longer inhibit an intrinsic tendency of the brainstem to cause vomiting

Vestibular reflex eventually excite a chemoreceptor trigger zone in the medulla

190 + Mcqs in Digestion Page 3 McqOptions

101.	An obstruction of the small bowel leading to sever vomiting with a preponderant loss of duodenal contents is likely to cause a primary:
A.	Metabolic acidosis
B.	Metabolis alkalosis
C.	Respiratory acidosis
D.	Respiratory alkalosis
Answer» B. Metabolis alkalosis

Discussion

102.	A pyloric obstruction in an infant which results in a prolonged bout of sever vomiting is likely to cause a primary:
A.	Metabolic acidosis
B.	Metabolic alkalosis
C.	Respiratory acidosis
D.	Respiratory alkalosis
Answer» C. Respiratory acidosis

Discussion

103.	Ingesting antacids with and after a meal so that PH doesn`t decrease below 6 will cause a greater than normal secretion of:
A.	Gastrin.
B.	Secretin.
C.	Pancreatic bicarbonate.
D.	CCK.
Answer» B. Secretin.

Discussion

104.	The pharyngeal phase of Swallowing:
A.	Can be voluntairly inhibited.
B.	Involves closure of larynx by the vocal cord.
C.	Is associated with lowering of the soft palate.
D.	Is accompanied by deep inspiration.
Answer» C. Is associated with lowering of the soft palate.

Discussion

105.	during which stage of Swallowing is respiration inhibited?
A.	Voluntary stage.
B.	pharyngeal stage.
C.	Esophageal stage.
D.	Postprandial stage.
Answer» C. Esophageal stage.

Discussion

106.	Loss of pancreatic secretion produces the following except:
A.	Maldigestion
B.	Malabsorption
C.	Dehydration
D.	Alkalosis
Answer» E.

Discussion

107.	Deglutition (Swallowing):
A.	Is a complicated act requiring the precise coordination of many muscle group.
B.	Is an automatic function of smooth muscle.
C.	Is associated with a lowering of hard palate to prevent reflux of food into the nasopharynx.
D.	Does not require relaxation of cricopharyngeal muscle.
Answer» B. Is an automatic function of smooth muscle.

Discussion

108.	So-called hunger pangs :
A.	Are truly due to smooth muscle spasm of the transverse colon.
B.	Are associated with esophageal and pyloric contraction that coexist with an empty relaxed stomach.
C.	Are more common if starvation is associated with hypoglycaemia.
D.	May occur in a totally vagotomized patient.
Answer» D. May occur in a totally vagotomized patient.

Discussion

109.	A 55 years old man with a history of chronic alcohol consumption presents to his local physician with non specific complaints of dyspepsia. Examination and diagnostic testing reveal that he has destruction of the gastric glands. The condition would predispose the patient to which of the following?:
A.	Steatorrhea
B.	Gastric hypomotility
C.	Gastric ulcer
D.	Anaemia
Answer» E.

Discussion

110.	All the following are correct statements about pancreatic secretion except:
A.	HCO3 rich fluid is secreted by ductal cells in response to secretin .
B.	Secretion of enzymes by acinar cells occurs in response to CCK.
C.	Vagotomy augment secretion of enzymes after meal .
D.	none
Answer» D. none

Discussion

111.	The gastric juice has all the following characteristics except:
A.	It contains an alkaline secretion from the surface epithelium
B.	It s PH is always less than 3
C.	It contains the intrinsic factor which is essential for vit.B absorption
D.	It s antibacterial action is produced by its mucous content
Answer» E.

Discussion

112.	All the following are true about liver functions except:
A.	Liver cells are the only important site for plasma albumin synthesis.
B.	Liver cells can store vitamin B12.
C.	Liver cells inactivates certain hormones by conjugation.
D.	Essential fatty acids are synthesized in liver.
Answer» E.

Discussion

113.	All the following statements are correct about liver cells except:
A.	They form non essential amino acids.
B.	They form hippuric acid by conjugation of benzoate with glycine.
C.	They form TPP from vitamin B6.
D.	none
Answer» D. none

Discussion

114.	Hydrochloric acid secretion:
A.	Is accomplished by passive diffusion.
B.	Requires the dissociation of water with subsequent exchange of the hydrogen ion for potassium ion.
C.	Requires anaerobic metabolism.
D.	Utilize protein molecules to neutralize OH remaining in the secretory cells.
Answer» C. Requires anaerobic metabolism.

Discussion

115.	Gastric emptying:
A.	Is normally completed about 9 hours after ingestion of a usual meal.
B.	Is slowest if the food is soft and rich in carbohydrates.
C.	Is inhibited by excessive acidity in the duodenum.
D.	Is accelerated by presences of fat or hypertonic solutions in the duodenum.
Answer» D. Is accelerated by presences of fat or hypertonic solutions in the duodenum.

Discussion

116.	Select a single incorrect answer about Swallowing:
A.	Reflex apnea occurs during the pharyngeal phase.
B.	the buccal phase of swallowing is voluntary.
C.	Food is prevented from entering the nose during swallowing by elevation of epiglottis.
D.	none
Answer» D. none

Discussion

117.	A 42years old salesman presents with the chief complaint of intermittent midepigastric pain that is relieved by antacids or eating. Gatric analysis reveals that basal and maximal acid output exceed normal values. The gastric hypersecretion can be explained by an increase in the plasma concentration of which of the following?:
A.	Somatostatin
B.	Histamine
C.	Gastrin
D.	Secretin
Answer» D. Secretin

Discussion

118.	Under the normal conditions, the bulk of gastric secretions are produces:
A.	Before the food is ingested and while the pleasure of it s ingestion is anticipated
B.	While the food stays in the stomach.
C.	After the food has entered the duodenum.
D.	During fasting periods.
Answer» C. After the food has entered the duodenum.

Discussion

119.	Pepsin, secreted by the gastric mucosa:
A.	Continues to act in the neutral medium of the duodenum.
B.	Is proteolytic on the mucosal surface, in the alkaline medium provided by the mucus secreted by the surface cells of the stomach.
C.	Is synthesized within the chief cells.
D.	Doesnot increased in concentration in response to the mental stimuli found in the so called cephalic phase of gastric digestion
Answer» D. Doesnot increased in concentration in response to the mental stimuli found in the so called cephalic phase of gastric digestion

Discussion

120.	Which of the following is the major factor that protects the duodenal mucosa from the damage by gastric acid?:
A.	Pancreatic bicarbonate secretions.
B.	The endogenous mucosal barrier of the duodenum.
C.	Duodenal bicarbonate secretion,
D.	Hepatic bicarbonate secretion.
Answer» B. The endogenous mucosal barrier of the duodenum.

Discussion

121.	Which of the following substances is released from the duodenal mucosa in response to acidic gastric juice?:
A.	CCK
B.	Substance P
C.	Secretin
D.	GIP
Answer» D. GIP

Discussion

122.	The act of Swallowing is associated with:
A.	Concurrent inhibition of respiration.
B.	Opening of the glottis.
C.	Movement of food into the nasopharynx.
D.	upper esophageal sphincter constriction when food placed in contact with the anterior pillars of the pharynx.
Answer» B. Opening of the glottis.

Discussion

123.	Anal mucosa is sensitive to all of the following except:
A.	Pain
B.	Stretch.
C.	Touch
D.	Temperature
Answer» C. Touch

Discussion

124.	Resting anal pressure is mainly due to :
A.	Tone of external anal sphincter
B.	Tone of the internal sphincter.
C.	Tone of the puborectalis muscle.
D.	none
Answer» C. Tone of the puborectalis muscle.

Discussion

125.	The pangs associated with hunger :
A.	Are decreased a low level of blood sugar.
B.	Are accompanied with feeling of hunger and pain in the pit of the stomach.
C.	Usually appear 3 to 4 hour after fasting begins.
D.	diminish after 1 to 2 days of starvation.
Answer» C. Usually appear 3 to 4 hour after fasting begins.

Discussion

126.	Select a single incorrect answer about pancreatic secretion.
A.	Trypsinogen is activated by enterokinase.
B.	Chymotrypsinogen is activated by trypsin
C.	Pancreatic lipase is activated by alkaline pH.
D.	none
Answer» D. none

Discussion

127.	Vomiting:
A.	Leads to expulsion of gastric contetnts by violent rhythmic contractions of gut smooth ms.
B.	Is coordinated by a mid-brain vomiting center
C.	Of green fluid suggests that duodenal contents have regurgitated into the stomach
D.	May be accompanied by a fall in arterial blood pressure
Answer» D. May be accompanied by a fall in arterial blood pressure

Discussion

128.	As regards the process of vomiting:
A.	Its is controlled by a center in the cerebral cortex
B.	It always begins with nausea
C.	Prolonged vomiting usually produces dehydration associated with acidosis
D.	It s associated with relaxation of the body and fundus of the stomach
Answer» E.

Discussion

129.	Rectal mucosa is sensitive to:
A.	Pain
B.	Touch
C.	Temperature
D.	Stretch
Answer» E.

Discussion

130.	The cephalic phase of gastric secretion :
A.	Occurs when food reach the stomch.
B.	Isnot accompanied by release of GRP.
C.	Is controlled by the vagi nerves.
D.	Isnot blocked by injection of atropine.
Answer» D. Isnot blocked by injection of atropine.

Discussion

131.	The following statements about gastric secretion are correct except:
A.	Gastric secretion increases when a hungry person thinks about food
B.	Gastric secretion helps vit.B absorption
C.	Production of HCl depends on activity of carbonic anhydrase
D.	Gastric secretion is associated with increased H concentrarion in venous blood coming from stomach
Answer» E.

Discussion

132.	hich of the following statements about gastric secretion is incorrect:
A.	Gastric acid secretion can be inhibited by somatostatin
B.	The main phase of gastric secretion is the gastric phase
C.	Gastric secretion increases in response to the presence of food in mouth after the vagi to stomach have been cut
D.	none
Answer» D. none

Discussion

133.	Under normal condition, the gastric secretion is:
A.	Not affected by presence of food in the stomach.
B.	Stimulated by norepinephrine and inhibited bu curare.
C.	Increased by distention of the stomach.
D.	Maximal before food ingestion.
Answer» D. Maximal before food ingestion.

Discussion

134.	Mass movement in the colon after meal is due to the following except:
A.	Gastrocolic reflex
B.	Duodenocolic reflex
C.	Gastrin hormone.
D.	Secretine hormone.
Answer» E.

Discussion

135.	The parasympathetic supply of the distal colon is:
A.	Pelvic nerve.
B.	Vagus nerve
C.	The lesser splanchnic nerve.
D.	The pudendal nerve.
Answer» B. Vagus nerve

Discussion

136.	Select a single incorrect answer about vomiting:
A.	Vomiting center is in hypothalamus
B.	The role of stomach is passive in the process of vomiting
C.	Vomiting may occur as a conditioned reflex
D.	none
Answer» B. The role of stomach is passive in the process of vomiting

Discussion

137.	It s believed that in parietal cells of the gastric mucosa (which secrete hydrochloric acid), an active transport system is responsible for the transmembrane passage of:
A.	Chloride
B.	Carbon dioxide.
C.	Bicarbonate.
D.	Water
Answer» B. Carbon dioxide.

Discussion

138.	Mass movement in the colon would be abolished by:
A.	Vagotomy.
B.	Sympathectomy.
C.	Destruction of the intrinsic nerve plexus.
D.	none
Answer» D. none

Discussion

139.	The external anal sphincter is supplied by:
A.	Pelvic nerve.
B.	Pudendal nerve.
C.	Vagus nerve
D.	none
Answer» C. Vagus nerve

Discussion

140.	Oxyntic or parietal cells secrete:
A.	HCL.
B.	Trypsin.
C.	Zymogen granules.
D.	Pepsinogen.
Answer» B. Trypsin.

Discussion

141.	Chronic gastritis is often associated with which of the following :
A.	Microcytic anemia.
B.	Hyperchlorohydria.
C.	Steatorrhea.
D.	pernicious anemia.
Answer» E.

Discussion

142.	Vitamin B12 absorption :
A.	Depends on presence of intrinsic factor.
B.	Depends on passive diffusion.
C.	Occurs in the jujenum.
D.	Occurs in the stomach.
Answer» B. Depends on passive diffusion.

Discussion

143.	The following statements about pancreatic secretion are false except:
A.	Pancreatic acini contain trypsin.
B.	Vagal stimulation produces HCO3 rich juice.
C.	The hormone which stimulates enzyme _ rich secretion also causes contraction of gall bladder.
D.	none
Answer» D. none

Discussion

144.	Concerning HCl secretion, all the following is true except:
A.	It s associated with increased PH of the gastric venous blood
B.	It s stimulated by gastrin, acetylcholine,histamine and norepinephiren
C.	The energy required is derived from ATP breakdown
D.	It involves formation of carbonic acid
Answer» C. The energy required is derived from ATP breakdown

Discussion

145.	PH of pancreatic secretion is about:
A.	1
B.	6.5- 7.5
C.	8
D.	non
Answer» D. non

Discussion

146.	Mucous presents on the surface of the mucosa of the stomach,smal and large intestine is:
A.	Resistant to enzymes secreted into the lumen of the gastrointestinal tract.
B.	Alkaline, and thus a poor buffer for alkaline foods.
C.	A non-amphoteric protein.
D.	Easily removed from the surface of the stomach by the gastric secretions during the gastric phase of digestion.
Answer» B. Alkaline, and thus a poor buffer for alkaline foods.

Discussion

147.	Gastric HCL secretion :
A.	Is a passive process that occurs in all parts of the stomach.
B.	Is stimulated by somatostatin,cimetidine & pyrenzepine.
C.	Is inhibited by histamine,gastrin & acetylcholine.
D.	plays a significant rule in iron absorption.
Answer» E.

Discussion

148.	Saliva is characterized by all the following except:
A.	Its concentration of K+ is the same as that in plasma.
B.	Its Na+&Clconcentration are lower than those in plasma.
C.	Its osmotic pressure and PH are lower than their corresponding values in plasma.
D.	It exerts antibacterial action.
Answer» B. Its Na+&Clconcentration are lower than those in plasma.

Discussion

149.	Gastric secretion is inhibited by all the following except:
A.	Presence of excess H in the pyloric antrum
B.	Presence of excess protein digestive products in the stomach
C.	Certain emotions e.g. fear and depression
D.	Certain GIT hormones e.g. secretin,CCK and VIP
Answer» C. Certain emotions e.g. fear and depression

Discussion

150.	A likely reason why a to and fro motion, such as that encountered during airplane flights or in an automobile ride over a bumpy road, tends to cause nausea and vomiting, is because during such motions:
A.	Much air is swallowed and the stomach becomes distended
B.	The stomach is more likely to develop reverse peristalsis
C.	The cerebral cortex can no longer inhibit an intrinsic tendency of the brainstem to cause vomiting
D.	Vestibular reflex eventually excite a chemoreceptor trigger zone in the medulla
Answer» E.

Discussion

Explore topic-wise MCQs in Uncategorized topics.

An obstruction of the small bowel leading to sever vomiting with a preponderant loss of duodenal contents is likely to cause a primary:

A pyloric obstruction in an infant which results in a prolonged bout of sever vomiting is likely to cause a primary:

Ingesting antacids with and after a meal so that PH doesn`t decrease below 6 will cause a greater than normal secretion of:

The pharyngeal phase of Swallowing:

during which stage of Swallowing is respiration inhibited?

Loss of pancreatic secretion produces the following except:

Deglutition (Swallowing):

So-called hunger pangs :

A 55 years old man with a history of chronic alcohol consumption presents to his local physician with non specific complaints of dyspepsia. Examination and diagnostic testing reveal that he has destruction of the gastric glands. The condition would predispose the patient to which of the following?:

All the following are correct statements about pancreatic secretion except:

The gastric juice has all the following characteristics except:

All the following are true about liver functions except:

All the following statements are correct about liver cells except:

Hydrochloric acid secretion:

Gastric emptying:

Select a single incorrect answer about Swallowing:

Under the normal conditions, the bulk of gastric secretions are produces:

Pepsin, secreted by the gastric mucosa:

Which of the following is the major factor that protects the duodenal mucosa from the damage by gastric acid?:

Which of the following substances is released from the duodenal mucosa in response to acidic gastric juice?:

The act of Swallowing is associated with:

Anal mucosa is sensitive to all of the following except:

Resting anal pressure is mainly due to :

The pangs associated with hunger :

Select a single incorrect answer about pancreatic secretion.

Vomiting:

As regards the process of vomiting:

Rectal mucosa is sensitive to:

The cephalic phase of gastric secretion :

The following statements about gastric secretion are correct except:

hich of the following statements about gastric secretion is incorrect:

Under normal condition, the gastric secretion is:

Mass movement in the colon after meal is due to the following except:

The parasympathetic supply of the distal colon is:

Select a single incorrect answer about vomiting:

It s believed that in parietal cells of the gastric mucosa (which secrete hydrochloric acid), an active transport system is responsible for the transmembrane passage of:

Mass movement in the colon would be abolished by:

The external anal sphincter is supplied by:

Oxyntic or parietal cells secrete:

Chronic gastritis is often associated with which of the following :

Vitamin B12 absorption :

The following statements about pancreatic secretion are false except:

Concerning HCl secretion, all the following is true except:

PH of pancreatic secretion is about:

Mucous presents on the surface of the mucosa of the stomach,smal and large intestine is:

Gastric HCL secretion :

Saliva is characterized by all the following except:

Gastric secretion is inhibited by all the following except:

A likely reason why a to and fro motion, such as that encountered during airplane flights or in an automobile ride over a bumpy road, tends to cause nausea and vomiting, is because during such motions: