MCQExams
0:0:1
CBSE
JEE
NTSE
NEET
Practice
Homework
×
CBSE Questions for Class 11 Medical Biology Digestion And Absorption Quiz 10 - MCQExams.com
CBSE
Class 11 Medical Biology
Digestion And Absorption
Quiz 10
Cholecystokinin and secretin are secreted by
Report Question
0%
Stomach
0%
Liver
0%
Duodenum
0%
Ileum
Explanation
C. Duodenum.
Solution: Secretin, a digestive hormone emitted by that wall of the duodenum that manages gastric acid secretion and pH levels of the duodenum. Cholecystokinin, formerly called pancreozymin, a digestive hormone released with secretin when food from the stomach reaches the first part of the duodenum.
In case of taking food rich in lime juice, the action of ptyalin on starch is _____.
Report Question
0%
Enhanced
0%
Reduced
0%
Unaffected
0%
Stopped
Explanation
B. Reduced.
Solution: Lime juice contains a mild organic acid, so consuming food with lime the juice will cause a lowering of pH in the mouth. If enough acidic food is consumed together with food containing starch, probably the effect would be slower digestion of starch since ptyalin is not much helping anymore.
So, the correct answer is option B.
Base of tongue is sensitive to taste
Report Question
0%
Salty
0%
Sweet
0%
Bitter
0%
Sour
Explanation
Tastes like sweet, salt, sour, bitter are sensed by all the sides of the tongue but the back of the tongue is very sensitive to bitter tastes.
So the correct option is 'Bitter.'
Which one is not matched
Report Question
0%
Pepsin - stomach
0%
Rennin - liver
0%
Trypsin - intestine
0%
Ptyalin - mouth
Explanation
Rennin, also called chymosin, a protein-digesting enzyme that curdles milk by transforming caseinogen into insoluble casein; it is found only in the fourth stomach of cud-chewing animals, such as cows. Its action extends the period in which milk is retained in the stomach of the young animal. So rennin and liver is not a correct match.
Hence the correct answer is option B.
Similar cone-shaped teeth are
Report Question
0%
Diphyodont
0%
Acrodont
0%
Homodont
0%
Thecodont
0%
Heterodont
Explanation
The same type of teeth are called homodont (homo is derived from the Greek word homos, meaning the same). Homodont animals have the same type of triangular-shaped teeth, called incisors. Maximum non-mammalian vertebrates have homodont dentition. For example, crocodile and shark.
So the correct answer is option C.
Proteolytic enzymes do not corrode lining of alimentary canal is ________.
Report Question
0%
They are secreted in inactive form
0%
Lining layer of alimentary canal does not contain protein
0%
The enzymes are not capable of digesting fat
0%
None of the above
Curdling of milk in small intestine would occur with the help of
Report Question
0%
Rennin
0%
Erepsin
0%
Trypsin
0%
Chymotrypsin
Explanation
Curdling of milk in small intestine is due to the presence of chymotrypsin. In babies curdling of milk occurs in stomach due to the presence of enzyme renin but in adults curdling occurs in small intestine by chymotrypsin enzyme which coagulate milk protein casein into curd.
So, the correct option is is 'Chymotrypsin'.
Which is different?
Report Question
0%
Gastrin
0%
Secretin
0%
Ptyalin
0%
Glucagon
Explanation
Correct Answer:
(C) Ptyalin.
Explanation:
Gastrin hormone
is secreted by the
G cells
of the stomach. and the cells that are present in the upper side of the small intestine.
Secretin hormone
is released by the S cells of our duodenum.
Glucagon
hormone is secreted by the pancreas.
While
Ptyalin
is an
enzyme
that is secreted by the salivary gland.
Hence,
Ptyalin alone is an enzyme while all the others are the hormone
. So,
option (C)
is the odd one and hence the correct option.
Where does hepatopancreatic duct open
Report Question
0%
Ileum
0%
Duodenum
0%
Jejunum
0%
Junction of duodenum with jejunum
Explanation
The hepatopancreatic duct
is a spherical structure located at the site of the confluence of the common bile duct and pancreatic duct, marking the entry point of bile and pancreatic juice into the duodenum.
So, the correct answer is option B.
Meckles diverticulum occurs in
Report Question
0%
Rectum
0%
Appendix
0%
Ileum
0%
Pylorus
Explanation
Meckles diverticulum is located in the distal ileum, usually within 60-100 cm of the ileocecal valve. This blind segment or small pouch is about 3-6 cm long and may have a greater lumen diameter than that of ileum.
So ,option C is the correct option.
\
Total number of canines in permanent dental set of human is
Report Question
0%
4
0%
6
0%
2
0%
12
Explanation
In humans, there are thirty-six permanent teeth, consisting of six maxillary and six mandibular molars, four maxillary and four mandibular premolars, two maxillary and two mandibular canines, four maxillary and four mandibular incisors.
So, option A is the correct option.
Cattle are able to digest cellulose which humans cannot because cattle have
Report Question
0%
Cellulose digesting bacteria
0%
More efficient digestive system
0%
Large stomach
0%
Long intestine
Explanation
A cow eats plant materials like hay and grass that is full of cellulose. Cellulose is very hard to digest, so the cow relies on bacteria and other organisms that live inside them to break down the cellulose into a form from which they can extract nutrients.
So, option A is the correct option.
Hydrolytic enzyme which acts at low pH is
Report Question
0%
-amylase
0%
Protease
0%
Hydrolases
0%
Peroxidases
Explanation
Protease, an enzyme for digesting protein acts in low pH that is in stomach. Amylase is a starch digesting enzyme and carbohydrate digestion does not occur in stomach. All digestive enzyme hydrolases.
So, option B is the correct option.
Digestion of cellulose in Rabbit takes place in
Report Question
0%
Caecum
0%
Colon
0%
Rectum
0%
Ileum
Explanation
Rabbits gaze on grass and leafy weeds that contain lots of hard to digest cellulose. To cope with a diet that is hard to extract nutrients from, rabbits have developed a unique digestive system. A lot of their digestion takes place in the cecum and rabbits produce two different types of droppings.
So, option A is the correct option.
Secretin is produced by
Report Question
0%
Liver
0%
Pancreas
0%
Large intestine
0%
Small intestine
Explanation
Secretin is secreted by S cells in the duodenum and affects numerous other organs systems. Besides regulating the growth of the epithelial cells in the pancreas and biliary system, secretin additionally exerts trophic effects.
So, option D is the correct option.
Part of alimentary canal meant for reabsorption of water from chyle is
Report Question
0%
Small intestine
0%
Colon
0%
Large intestine
0%
Rectum
Starch digestion by amylase is completed in
Report Question
0%
Ileum
0%
Duodenum
0%
Stomach
0%
Mouth
0%
Oesophagus
Explanation
The digestion of starch begins with salivary amylase, but this activity is much less important than that of pancreatic amylase in the small intestine. Amylase hydrolyzes starch, with the primary end products being maltose, maltotriose is produced.
So, option A is the correct option.
What will happen if secretion of parietal cells of gastric glands is blocked?
Report Question
0%
Gastric juice is deficient of pepsinogen
0%
Gastric juice is deficient of chymosin
0%
Deficiency of HCl leads to nonconversion of inactive pepsinogen into active pepsin
0%
Nonrelease of enterokinase from duodenal mucosa and non-conversion of trypsinogen into trypsin
Explanation
Gastric glands are numerous microscopic tubular glands formed by the epithelium of stomach. The parietal cells (oxyntic cells) are large and most numerous on the sidewalls of gastric glands. They secrete hydrochloric acid and castle intrinsic factor. The peptic cells (zymogen) cells of gastric glands secrete gastric digestive enzymes as proenzymes-pepsinogen and prorennin and a small amount of gastric amylase and gastric lipase. The hydrochloric acid maintains a strongly acidic pH of about 1.5 to 2.5 in the stomach. HCl converts pepsinogen and prorennin to pepsin and rennin respectively.
So, the correct answer is 'Deficiency of HCl leads to nonconversion of inactive pepsinogen into active pepsin'.
Number of milk teeth found in humans is
Report Question
0%
32
0%
20
0%
52
0%
12
Explanation
In human, the deciduous dentition consist of 20 total teeth with dental formula 2102 indicating two incisors, one canine, zero premolars and two molars in each quadrant.
So, option B is the correct option.
Food bolus after passing through alkaline medium in the alimentary canal is
Report Question
0%
Chylomicron
0%
Chyme
0%
Chyle
0%
Fat body
pH of saliva is
Report Question
0%
9.5
0%
8.0
0%
7.0
0%
6.5
Most of the fats absorbed in small intestine enter
Report Question
0%
Lacteal
0%
Venule
0%
Microvilli
0%
Arteriole
Partially digested semisolid food formed in stomach is
Report Question
0%
Chyle
0%
Chyme
0%
Bolus
0%
Chylomicron
Alimentary canal of herbivorous animals is
Report Question
0%
Short
0%
Long
0%
Wide
0%
Thin
Find out the correct sequence of substrate, enzyme and product
Report Question
0%
$$Small intestine : Proteins \xrightarrow{pepsin} Amino acids$$
0%
$$Stomach : Fats \xrightarrow{Lipase}micelles$$
0%
$$Duodenum : Triglycerides \xrightarrow{trypsin} Monoglycerides$$
0%
$$Small intestine : Starch \xrightarrow{a-amylase}Maltose$$
Explanation
The saliva contains an enzyme called salivary
amylase
which hydrolyses
starch
into maltose. The complete digestion of
starch
occurs only in the small intestine by the action of pancreatic
amylase
.
The activity of enzymes is strongly affected by several factors, such as temperature and pH.
So, the correct option is 'Option D'.
Most digestion and absorption takes place in
Report Question
0%
Stomach
0%
Caecum
0%
Small intestine
0%
Large intestine
Nonpathogenic bacterium present in large intestine is
Report Question
0%
Staphylococcus aureus
0%
Escherichia coli
0%
Helicobacter pylori
0%
Leptospira interrogans
Salivary amylase of saliva begins digestion of
Report Question
0%
Carbohydrate
0%
Nucleic acid
0%
Fat
0%
Protein
Explanation
Saliva contains enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which the body can more easily absorb. Saliva also contains an enzyme called lingual lipase, which breaks down fats.
So, the correct answer is '
Carbohydrate'
Some symbiotic microorganisms occur in human body in
Report Question
0%
Vermiform appendix and rectum
0%
Colon
0%
Duodenum
0%
Oral lining and tongue surface
Explanation
Caecum is the proximal part of large intestine. It is connected to colon (the largest part of large intestine). Colon does not contain digestive gland but harbours a number of microorganisms, which feed on undigested matter, some of them are symbiotic.
Hence the correct answer is (B)
Back flow of faecal matter from large intestine is prevented by
Report Question
0%
Epiglottis
0%
Sphincter of Oddi
0%
Ileocaecal valve
0%
Gastro-oesophageal sphincter
Explanation
The backflow of faecal matter from the large intestine into the small intestine is prevented due to the presence of the ileocecal valve.Ileocecal valve is also called as Tulp's valve or ileal papilla. Ileocecal valve is a sphincter valve and it separates large intestine from the small intestine. Hence, the correct answer is (C)
Aggregates of lymphoid tissue present in distal portion of small intestine are known as
Report Question
0%
Villi
0%
Rugae
0%
Choroid plexus
0%
Peyer's patches
Explanation
Peyer's patches are small masses of lymphoid tissue found throughout the wall of the ileum region of the small intestine of mammals. It is also known as lymphoid nodules. It is an important part of the immune system which prevents the infection of pathogenic bacteria in the intestine.
Hence, the correct answer is (D)
Which teeth of humans are shovel-shaped and used for nibbling, cutting, and tearing?
Report Question
0%
Canines
0%
Premolars
0%
Molars
0%
Incisors
Explanation
The central incisors and lateral incisors are mostly used for biting and cutting, and canine teeth are used for tearing food. The premolars, molars and wisdom teeth are used for chewing and grinding food.
Hence, the correct answer is (D)
In humans, Glisson's capsule is associated with
Report Question
0%
Digestive system
0%
Excretory system
0%
Nervous system
0%
Endocrine system
0%
Reproductive system
Explanation
Glisson's capsule: The capsule of the liver. A layer of connective tissue surrounding the liver and ensheathing the hepatic artery, portal vein, and bile ducts of the liver.
Hence the correct answer is (A)
Saliva produced per day is
Report Question
0%
3 $$dm^3$$
0%
1.5 $$dm^3$$
0%
2.0 $$dm^3$$
0%
2.5 $$dm^3$$
Explanation
The amount of saliva produced by a healthy human ranges from 0.75 to 1.5 liters per day.
Sub-mandibular gland contributes 70-75% of secretion, while parotid gland secretes 20-25% and small amount is secreted by other salivary glands.
One litre is equal to one dm$$^3$$.
So, the correct answer is option B.
Diagram of large intestine is given here. Identify the parts a, b, c, d, e, and f
Report Question
0%
a sigmoid, b vermiform appendix, c ascending colon, d transverse colon, e descending colon, f caecum
0%
a caecum, b vermiform appendix, c sigmoid, d ascending colon, e transverse colon, f descending colon
0%
a caecum, b vermiform appendix, c ascending colon, d transverse colon, e descending colon, f sigmoid
0%
a sigmoid, b vermiform appendix, c descending colon, d transverse colon, e ascending colon, f - caecum
Explanation
So, the correct answer is '
a caecum, b vermiform appendix, c ascending colon, d transverse colon, e descending colon, f sigmoid'
Which is absorbed in ileum?
Report Question
0%
Vitamin K
0%
Bile salt
0%
Fat
0%
Glucose
First portion of small intestine is called
Report Question
0%
Jejunum
0%
Duodenum
0%
Cystic duct
0%
Ileum
Explanation
The beginning portion of the small intestine (the Duodenum
) begins at the exit of the stomach (pylorus) and curves around the pancreas to end in the region of the left upper part of the abdominal cavity where it joins the jejunum.
Hence, the correct answer is (B)
Ileocaecal valve is present in between
Report Question
0%
Colon and large intestine
0%
Colon and small intestine
0%
Stomach and small intestine
0%
Cardiac stomach and fundus
Explanation
Ileocaecal valve is a sphincter muscle that guards the opening of large intestine. It is found where small intestine(ileum) connects to the large intestine(colon) and controls the flow between these two areas to prevent the contents
of colon from contaminating the small intestine.
So, the correct answer is '
Colon and small intestine'
Enzymes present in gastric juice of stomach are
Report Question
0%
Pepsin and rennin
0%
Trypsin and rennin
0%
Amylase and lipase
0%
Maltase and sucrase
Explanation
Pepsin is a stomach enzyme that serves to digest proteins found in ingested food. Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen and rennin that digests proteins and coagulates milk respectively. Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin. Hence, the correct answer is (A)
Which is component of Waldeyer's ring
Report Question
0%
Pharynx
0%
Tonsils
0%
Ileum
0%
Oesophagus
Explanation
Waldeyer's ring consists of 4
tonsillar structures (namely, the pharyngeal, tubal, palatine and lingual tonsils) as well as small collections of lymphatic tissue disbursed throughout the mucosal lining of the pharynx (mucosa-associated lymphoid tissue, MALT).
so, the correct answer is '
Tonsils
Choose the wrong statement among the following.
Report Question
0%
Trypsinogen is activated by enterokinase.
0%
Optimum pH for salivary amylase is 8.9.
0%
Rennin helps in digestion of milk proteins.
0%
Goblet cells secrete mucus.
0%
Submucosal glands of intestine are also known as Brunner's glands.
Explanation
The o
ptimum pH for salivary amylase ranges between 6.7 to 7. Salivary amylase is the enzyme secreted by salivary glands that breaks down carbohydrates into maltose.
Trypsin is an active enzyme that is formed when the trypsinogen is activated by enterokinase.
Renin is an enzyme that is secreted by the kidney and helps in the digestion of milk proteins.
Goblet cells are unicellular mucus-secreting glands.
Submucosal glands are those that are present in the duodenum of the small intestine and are known as Brunner's glands.
Hence, the correct answer is option B.
Middle part of small intestine is
Report Question
0%
Ileum
0%
Jejunum
0%
Duodenum
0%
Pyloric region
Explanation
Jejunum is the middle section of the small intestine carries food through rapidly, with wave-like muscle contractions, towards the ileum. Ileum: This last section is the longest part of your small intestine. The ileum is where most of the nutrients from the food are absorbed before emptying into the large intestine.
So, the correct answer is '
Jejunum'.
Absence of _________ enzyme in small intestine will severely affect digestion of proteins
Report Question
0%
Maltase
0%
Lipase
0%
Enterokinase
0%
Pancreatic amylase
Which one does not produce any digestive enzymes
Report Question
0%
Salivary glands
0%
Pancreas
0%
Liver
0%
Stomach
Vermiform appendix arises from _______.
Report Question
0%
Caecum
0%
Colon
0%
Rectum
0%
Ileum
Explanation
Vermiform appendix arises from the c
aecum. The vermiform appendix is a long narrow tube that is responsible for the removal of waste products from the digestive system of our body. It is closed from one end and on another end, it arises from the posteromedial wall of the caecum. The caecum is the part of the large intestine that helps in the absorption of salts and fluids and also works as a lubricant for solid food.
The colon is the part of the large intestine that helps in the removal of waste matter from the digested food.
The rectum is present at the distal end of the large intestine and it acts as temporary storage of stool.
The ileum is to absorbs various vitamins and bile salts. It is present at the distal end of the small intestine.
Hence, the correct answer is option A.
Identify the correctly matched structure and its secretion
Report Question
0%
Brunner's glands -Salivary amylase
0%
Intestinal mucosa - Insulin
0%
Gall bladder -Bile
0%
Salivary gland - Lysozyme
0%
Goblet cells - HCl
The alimentary canal in humans has length of
Report Question
0%
6-9 m
0%
2-5 m
0%
10-28 m
0%
1-2 m
Eye teeth are
Report Question
0%
Upper incisors
0%
Lower incisors
0%
Lower canines
0%
Upper canines
Explanation
Canines in the upper arch are also often called “eye teeth,” which, when you come to think of it, is kind of a weird name for them. But the most common explanation is actually pretty simple: these teeth lie directly below the eye sockets.
So, the correct option is 'Upper canines'.
Which enzyme initiates the digestion of proteins?
Report Question
0%
Trypsin
0%
Pepsin
0%
Amino peptidase
0%
Carboxy peptidase
Explanation
Protein digestion first begins in the stomach, where pepsinogen is converted to active form pepsin, by hydrochloric acid. Pepsin breaks proteins down into polypeptides. Thus the correct answer is option B.
Which one is the correct option for labels A, B and C in the given diagram?
Report Question
0%
A- Liver, B- Mucosa, C- Peritoneum
0%
A- Liver, B- Circular muscle layer , C- Serosa
0%
A- Pancreas, B- Mucosa, C- Peritoneum
0%
A- Pancreas, B- Submucosa, C- Serosa
Explanation
The pancreas is a single endodermal flat leaf-like yellowish, heterocrine gland present between ascending and descending limb of the duodenum.
The serosa is the outermost covering of the human intestine. It is followed by submucosa and mucosa.
So, the correct answer is D.
0:0:1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
0
Answered
0
Not Answered
0
Not Visited
Correct : 0
Incorrect : 0
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Practice Class 11 Medical Biology Quiz Questions and Answers
<
>
Support mcqexams.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page
