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Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - JAMB MCQ


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30 Questions MCQ Test Biology for JAMB - Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT)

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) for JAMB 2024 is part of Biology for JAMB preparation. The Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) questions and answers have been prepared according to the JAMB exam syllabus.The Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) MCQs are made for JAMB 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) below.
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Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 1

Dental formula of adult man is -

[ST-74, 76, CPMT-74, 81, BHU-81]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 1

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 2

Rumen of a cow is a part of its-

[ST-76]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 2
  • Ruminants are hooved animals with a stomach divided into four chambers- rumen, reticulum, omasum, and abomasum. 
  • The rumen is the largest stomach compartment and consists of several sacs.
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Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 3

In Colon, constrictions of its wall form a series of small pockets called-

[CPMT-71]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 3

The small pouches caused by sacculation (sac formation) , which give the colon its segmented appearance, are the haustra of the colon.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 4

Diastema is-

[CPMT-72]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 4

Diastema is a toothless gap on rabbit's jaw bone due to absence of canine. Diastema help in manipulation of food during mastication and "gnawing".

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 5

Total number of teeth in rabbit is-

[CPMT-79]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 5

Rabbits have 28 teeth: those 4 big incisors in front, a set of 4 'peg' teeth hiding directly behind the incisors, and then 20 pro-molars and molars in the back of their mouths for grinding forages. Rabbits use their incisors to break off forages, and then the molars in back grind side-to-side in order to pulverize the fibers.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 6

pH of stomach in Rabbit is about-

[CPMT-79]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 6

The pH in the stomach is acidic (less than 7). The stomach is the site of digestion of proteins. Hydrochloric acid is secreted in the stomach, which makes the pH acidic. The acidic pH is required for activation and activity of proteolytic enzyme pepsin. 

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 7

Number of teeth which are monophyodent in man is

[CPMT-79]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 7

Number of monophyodont teeth in man is 12. Monophyodont teeth refers to teeth which are not replaced during lifetime. This formula denotes number of teeth in half jaw. Therefore, 3×4 = 12, i.e number of monophyodont teeth.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 8

Teeth not found in rabbit is -

[CPMT-81]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 8

Rabbit is herbivorous animal and depends on cellulose based food. It has no canines in jaw. The dental formula is 2 0 3 3 / 1 0 2 3 for incisors, canine, premolar and molars in each jaw. Thus the canines are absent.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 9

The cells of the epithelial lining in the vertebrate stomach are not damaged by HCl because of

[NCERT-81]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 9

The mucus and bicarbonates present in the gastric juice play an important role in lubrication and protection of the mucosal epithelium from excoriation by the highly concentrated hydrochloric acid.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 10

The structure which prevents entry of food into wind pipe during swallowing in mammals is

 [CPMT-84,91] 

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 10
  • The epiglottis moves back and forth to prevent the passage of food and liquids into the lungs.
  • The usual upright position of the epiglottis allows air to flow into the lungs and the larynx.
  • When you swallow, the epiglottis flattens backward to cover the entrance to your larynx and prevent food from entering the lungs and windpipe.
  • The epiglottis returns to its usual position after swallowing.
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 11

Which of the following is a common passage in swallowing food and breathing-

[CPMT-85]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 11
  • Pharynx is the region behind the mouth, beneath the nasal cavity, and above the oesophagus and larynx.
  • This region of the body is considered to be the common passage in both ingesting food and breathing.
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 12

Total no. of incisor teeth in rabbit is

[CPMT-85, BHU-77]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 12

Those big front teeth, called incisors, get all the attention, but an adult rabbit actually has a full set of 28 teeth. There are six incisors total: two on the top, two on the bottom, and two "peg teeth," which are tiny incisors located right behind the upper incisors.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 13

The hardest constituent of the tooth is-

[DPMT-87]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 13

Enamel is the hardest, white coloured outer part of the tooth, which covers the crown of the tooth.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 14

Peyer's patches produce-

[RPMT-87, CPMT-90]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 14

Peyer’s patches are groupings of lymphoid follicles in the mucus membrane that lines your small intestine. Lymphoid follicles are small organs in the lymphatic system that are similar to lymph nodes.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 15

Which teeth are absent in rabbit-

[CPMT-91]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 15
  • Rabbit is herbivorous animal and depends on cellulose based food. Thus, it has no canines in jaw. 
  • Instead, there is a space between the incisors and premolars called the diastema.
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 16

Types of teeth in Rabbit-

[CPMT-91]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 16

Thecodont dentition is found in mammals in which root of the tooth is firmly fixed in a socket of the jawbone, making the attachment strongest in vertebrates. This is a peg and socket attachment with the help of cementum that surrounds the root portion of the tooth.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 17

In frog, the surface of attachment of tongue is

[CBSE-92]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 17
  • Hyoid apparatus is located on the floor of the buccal cavity and in between the two arms of the mandibular arch.
  • The hyoid apparatus provides a surface for the attachment of tongue muscles and respiratory muscles. 
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 18

Hard palate is formed of (In Rabbit)-

[CPMT-90]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 18

The hard palate is anterior part of the palate. lt is made up of Maxilla and palatine bones in human. But in Rabbit it is made of Pre-maxilla, maxilla and palatine bones. On the ventral surface of hard palate, some projection or transverse ridges are present, which are called as palatine rugae.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 19

Posterior part of soft palate, hangs down in pharynx, called-

[RPMT-88]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 19
  • Velum palati is the posterior muscular portion of the palate, forming an incomplete septum between the mouth and the oropharynx and between the oropharynx and the nasopharynx.
  • It assists the levator veli palatini in elevating the palate to occlude and prevent entry of food into the nasopharynx during swallowing.
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 20

Nasal chambers and buccal cavity are separated by

[RPMT-86]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 20

The palate is the roof the mouth in humans and other mammals. It separates the oral cavity from the nasal cavity.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 21

Cheek teeth are-

[RPMT-86]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 21

Cheek teeth or post-canines comprise the molar and premolar teeth in mammals. Cheek teeth are multicuspidate (having many folds or tubercles).

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 22

Presence of water amount in enamel cell is

[RPMT-90]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 22

Enamel is the hardest substance of the human body derived from the ectodermal ameloblasts. The water content in it is negligible (≈ 3%)

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 23

Jacobson's organs are related with-

[RPMT-90]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 23

Jacobson Organ ,also known as Vomeronassal organ is an organ of chemoreception that is part of the olfactory system of amphibians and reptiles that detects heavy moisture borne odour particles.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 24

In which animal tongue control the temperature

[RPMT-87]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 24

The sweat glands of dog are located on it's tongue. This is the reason why dogs pant a lot in summer to release excess heat from the body.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 25

In which part of stomach mainly digestion occurs

[RPMT-84]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 25
  • The stomach, located in the upper left portion of the abdominal cavity, has three major parts: a cardiac portion where the esophagus opens, a fundic region and a pyloric portion which opens into the first part of small intestine.
  • The most important part is the fundic part which forms the body of the stomach and produces most of the digestive enzymes for digestion.
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 26

Parietal cells of mucosa in stomach is secrets :

[RPMT-89]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 26

Parietal cells (also known as oxyntic cells), are the stomach epithelial cells, that secrete gastric acid (HCl) and intrinsic factor. These cells are only located in glands found in a particular area of the stomach, known as the fundus.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 27

Hydrochloric acid is secreted by the :-

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 27
  • The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells (also called oxyntic cells) in the gastric glands in the stomach.
  •  Parietal cells contain an extensive secretory network (called canaliculi) from which the hydrochloric acid is secreted into the lumen of the stomach.
Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 28

In Human being sphincter of oddi is situated in :-

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 28

The sphincter of Oddi, abbreviated as SO, is a muscular valve that controls the flow of digestive juices through the ampulla of Vater into the second part of the duodenum. The sphincter of Oddi is relaxed by the hormone cholecystokinin via vasoactive intestinal peptide.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 29

Enamel of teeth is secreted by :-

[CBSE-98]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 29

Ameloblasts are cells present only during tooth development that deposit tooth enamel, which is the hard outermost layer of the tooth forming the surface of the crown.

Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 30

Lower jaw composed of in Rabbit :-

[CBSE-98]

Detailed Solution for Test: Alimentary Canal: Mouth, Pharynx & Esophagus - 1 (Old NCERT) - Question 30

In rabbits, upper incisors are attached to premaxilla. Upper premolars and molars are attached to the maxilla bone. While lower teeth are attached to dentary bone. Dentary comprises of the lower jaw.

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