১.
Digestion of proteins starts in
ব্যাখ্যা
Digestion of proteins does not occur in mouth, since saliva does not contain any proteolytic enzymes. So, the digestion of proteins starts only in stomach
PrepBank · বিষয়ভিত্তিক প্রশ্ন
Digestion
Digestion
PrepBank · পাতা ১ / ১ · ১–২১ / ২১
২.
Ptyalin is required in digestion of
৩.
Stimuli that inhibit gastrin secretion
ব্যাখ্যা
Somatostatin inhibits gastrin secretion.
৪.
Accessory digestive organs exclude
ব্যাখ্যা
Accessory digestive organs are those which help primary digestive organs in the process of digestion. Accessory digestive organs are:
• Teeth
• Tongue
• Salivary glands
• Exocrine part of pancreas
• Liver
• Gallbladder
৫.
Which one is acidic?
৬.
Substance that increase salivary secretion
ব্যাখ্যা
Substances which increase salivary secretion
• Sympathomimetic drugs like adrenaline and ephedrine.
• Parasympathomimetic drugs like acetylcholine, pilocarpine, muscarine and physostigmine.
• Histamine.
Substances which decrease salivary secretion
• Sympathetic depressants like ergotamine and dibenamine.
• Parasympathetic depressants like atropine and scopolamine.
• Anesthetics such as chloroform and ether stimulate the secretion of saliva. However, deep anesthesia decreases the secretion due to central inhibition.
৭.
Increased vagal tone tends to increase
ব্যাখ্যা
Effects of increased vagal tone
On CVS -
-Negative inotropism
-Negative chronotropism
-Decreases excitability
-Decreases conductivity
On GIT-
-increased secretion of GIT
-increased motility of GIT
৮.
HCL is secreted from-
ব্যাখ্যা
HCl is secreted from parietal/oxyntic cell of stomach.
৯.
Secretin matches with
ব্যাখ্যা
Secretin is released from small intestine when stomach acid contents come to duodenum.
Functions:
• It inhibits gastric emptying to delay the acid contents of stomach to enter in the duodenum.
• It inhibits gastric secretion.
• It acts on pancreatic duct to produce large volume of watery, NaHCO3 secretion.
• It stimulates the secretion of NaHCO3 rich bile in the liver by acting on the bile ducts.
Functions:
• It inhibits gastric emptying to delay the acid contents of stomach to enter in the duodenum.
• It inhibits gastric secretion.
• It acts on pancreatic duct to produce large volume of watery, NaHCO3 secretion.
• It stimulates the secretion of NaHCO3 rich bile in the liver by acting on the bile ducts.
১০.
Which of the following is the site of secretion of intrinsic factor?
ব্যাখ্যা
Intrinsic factor is secreted by the parietal cells of the gastric fundus (as is HCl). It is absorbed, with vitamin B12, in the ileum.
১১.
Activator of salivary α-amylase
ব্যাখ্যা
Cl- activates salivary alpha amylase.
১২.
In infants, defecation often follows a meal. The cause of colonic contractions in this situation is -?
ব্যাখ্যা
Explanation- Distension of the stomach by food initiates contractions of the rectum and, frequently, a desire to defecate. The response is called the gastrocolic reflex, and may be amplified by an action of gastrin on the colon. Because of the response, defecation after meals is frequent in children. In adults, habit and cultural factors play a large role in determining when defecation occurs.
Reference-Ganong physiology/26th/P-494
Reference-Ganong physiology/26th/P-494
১৩.
Factor stimulating the Secretion of Hydrochloric Acid
ব্যাখ্যা
Factors Stimulating the Secretion of Hydrochloric Acid
• Gastrin
• Histamine
• Vagal stimulation
Factors Inhibiting the Secretion of Hydrochloric Acid
• Secretin
• Gastric inhibitory polypeptide
• Peptide YY
১৪.
Digestion of proteins does not occur in
ব্যাখ্যা
Digestion of proteins does not occur in mouth, since saliva does not contain any proteolytic enzymes. So, the digestion of proteins starts only in stomach.
১৫.
Secretion of which of the following substances is inhibited by low pH?
ব্যাখ্যা
Gastrin’s principal physiologic action is to increase H+ secretion. H+ secretion decreases the pH of the stomach contents. The decreased pH, in turn, inhibits further secretion of gastrin—a classic example of negative feedback.
১৬.
Activator of pepsinogens
ব্যাখ্যা
HCl activates pepsinogen to active pepsin.
১৭.
Composition of normal human pancreatic juice
ব্যাখ্যা
Composition of normal human pancreatic juice.
Cations: Na+, K+, Ca2+, Mg2+ (pH approximately 8.0)
Anions: HCO3-, Cl-, SO42-, HPO42-
Digestive enzymes -95% of protein in juice)
Other proteins
Cations: Na+, K+, Ca2+, Mg2+ (pH approximately 8.0)
Anions: HCO3-, Cl-, SO42-, HPO42-
Digestive enzymes -95% of protein in juice)
Other proteins
১৮.
Stimuli that increase gastrin secretion
১৯.
Which one may be acidic?
২০.
Which of the following has the highest pH?
ব্যাখ্যা
Explanation- pH of pancreatic juice is approximately 8.0.
Reference-Ganong physiology/26th/P-454/T-25.3
Reference-Ganong physiology/26th/P-454/T-25.3
২১.
When hunger contractions occur in the stomach, the person sometimes experiences mild pain in the pit of the stomach, called
ব্যাখ্যা
When hunger contractions occur in the stomach, the person sometimes experiences mild pain in the pit of the stomach, called hunger pangs.