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Digestion & Absorption Test 4

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Digestion & Absorption Test 4
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  • Question 1
    1 / -0

    Dental formula of adult man is -

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

    Solution

  • Question 2
    1 / -0

    Rumen of a cow is a part of its-

    [ST-76]

    Solution

    • 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.

  • Question 3
    1 / -0

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

    [CPMT-71]

    Solution

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

  • Question 4
    1 / -0

    Diastema is-

    [CPMT-72]

    Solution

    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".

  • Question 5
    1 / -0

    Total number of teeth in rabbit is-

    [CPMT-79]

    Solution

    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.

  • Question 6
    1 / -0

    pH of stomach in Rabbit is about-

    [CPMT-79]

    Solution

    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. 

  • Question 7
    1 / -0

    Number of teeth which are monophyodent in man is

    [CPMT-79]

    Solution

    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.

  • Question 8
    1 / -0

    Teeth not found in rabbit is -

    [CPMT-81]

    Solution

    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.

  • Question 9
    1 / -0

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

    [NCERT-81]

    Solution

    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.

  • Question 10
    1 / -0

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

     [CPMT-84,91] 

    Solution

    • 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.

  • Question 11
    1 / -0

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

    [CPMT-85]

    Solution

    • 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.

  • Question 12
    1 / -0

    Total no. of incisor teeth in rabbit is

    [CPMT-85, BHU-77]

    Solution

    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.

  • Question 13
    1 / -0

    The hardest constituent of the tooth is-

    [DPMT-87]

    Solution

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

  • Question 14
    1 / -0

    Peyer's patches produce-

    [RPMT-87, CPMT-90]

    Solution

    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.

  • Question 15
    1 / -0

    Which teeth are absent in rabbit-

    [CPMT-91]

    Solution

    • 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.

  • Question 16
    1 / -0

    Types of teeth in Rabbit-

    [CPMT-91]

    Solution

    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.

  • Question 17
    1 / -0

    In frog, the surface of attachment of tongue is

    [CBSE-92]

    Solution

    • 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. 

  • Question 18
    1 / -0

    Hard palate is formed of (In Rabbit)-

    [CPMT-90]

    Solution

    Hard palate is always on the upper side of the anterior buccal cavity. In rabbit that portion is made up of premaxilla, maxilla and Palatine bones.

  • Question 19
    1 / -0

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

    [RPMT-88]

    Solution

    • 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.

  • Question 20
    1 / -0

    Nasal chambers and buccal cavity are separated by

    [RPMT-86]

    Solution

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

  • Question 21
    1 / -0

    Cheek teeth are-

    [RPMT-86]

    Solution

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

  • Question 22
    1 / -0

    Presence of water amount in enamel cell is

    [RPMT-90]

    Solution

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

  • Question 23
    1 / -0

    Jacobson's organs are related with-

    [RPMT-90]

    Solution

    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.

  • Question 24
    1 / -0

    In which animal tongue control the temperature

    [RPMT-87]

    Solution

    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.

  • Question 25
    1 / -0

    In which part of stomach mainly digestion occurs

    [RPMT-84]

    Solution

    • 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.

  • Question 26
    1 / -0

    Parietal cells of mucosa in stomach is secrets :

    [RPMT-89]

    Solution

    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.

  • Question 27
    1 / -0

    Hydrochloric acid is secreted by the :-

    Solution

    • 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.

  • Question 28
    1 / -0

    In Human being sphincter of oddi is situated in :-

    Solution

    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.

  • Question 29
    1 / -0

    Enamel of teeth is secreted by :-

    [CBSE-98]

    Solution

    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.

  • Question 30
    1 / -0

    Lower jaw composed of in Rabbit :-

    [CBSE-98]

    Solution

    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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