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Questions Related to evs - i

'Crypts of Lieberkuhn' are found in

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Gall bladder

  2. Liver

  3. Pancreas

  4. Intestinal glands

Show answer
Correct Option: D
Explanation:

Folds of small intestine are conical shaped villi.  Small slit like space is found at the base of villi. These spaces are called crypts of Lieberkuhn. The crypts of Leiberkuhn secrete succus entericus or intestinal juice. The succus entericus mainly contains water (99%) and various digestive enzymes (1%). 

The major site of protein breakdown to form free amino acids is in the

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Kidney

  2. Spleen

  3. Liver

  4. Bone marrow

Show answer
Correct Option: C
Explanation:
During the digestion of proteins, hydrochloric acid and proteolytic enzymes in the stomach break down the intact protein molecule into amino acids, which are then absorbed through the intestinal wall. Further breakdown of amino acids to form free amino acid like α-keto acids occurs in the liver by a process known as transamination. It occurs in liver.

In man there are about 35,000,000 gastric pits at about

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. $200/{ mm }^{ 2 }$.

  2. $300/{ mm }^{ 2 }$.

  3. $1000/{ mm }^{ 2 }$.

  4. $100/{ mm }^{ 2 }$.

Show answer
Correct Option: B

Enamel of teeth is secreted by

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Ameloblast

  2. Odontoblast

  3. Osteoblast

  4. Osteoclast

Show answer
Correct Option: A
Explanation:

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.

The reason why the liver of alcohol addicts gets damaged is that it 

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Has to detoxify the alcohol.

  2. Stores excess of glycogen.

  3. Is over stimulated to secrete bile.

  4. Accumulate excess of fats.

Show answer
Correct Option: D
Explanation:

  • The liver breaks down and filters out harmful substances in the body. It also converts vitamins, nutrients and medicines into substances that our bodies can use.
  •  A central role in the toxicity of alcohol may be played by acetaldehyde itself. Although the liver converts acetaldehyde into acetic acid, it reaches a saturation point where some of it escapes into the blood stream.
  •  The accumulated acetaldehyde exerts its toxic effects by inhibiting the mitochondria reactions and functions. Hence, The reason why the liver of alcohol addicts gets damaged is that it Accumulate excess of fats.
So, the correct answer is 'Accumulate excess of fats'.

During prolonged starvation, body derives nutrition from 

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Liver and adipose

  2. Spleen

  3. Liver and lungs

  4. Subcutaneous fat and Pancreas

Show answer
Correct Option: A
Explanation:

Liver along with muscles stores excess glucose as glycogen, which can be used in times of starvation to maintain blood glucose levels. Excess carbohydrates are also stored as fat in adipose tissue around visceral organs and underneath the skin. During starvation the fat in the adipose tissue can be metabolised to derive energy.

Total number of teeth in rabbit is

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. 43

  2. 24

  3. 28

  4. 32

Show answer
Correct Option: C
Explanation:

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. The total number of teeth in upper jaw are 16 and 12 teeth in lower jaw. Thus total number of teeth are 28.

If the dental formula of rabbit is $\frac { 2033 }{ 1023 } $. What does it show?

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Total number of teeth in rabbit is 15.

  2. Number of total incisors in rabbit is 3.

  3. Diastema is present between incisors & premolars.

  4. In the formula 2033 is for adult and 1033 is for young ones.

Show answer
Correct Option: C
Explanation:

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. There is a gap in both the jaws at the location of canines. It is called as diastema. The total number of teeth in upper jaw are 16 and 12 teeth in lower jaw. The total number of teeth are 28. 

In rabbit, hard palate is formed of

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Premaxilla, vomer and dentary bones

  2. Premaxilla, maxilla and palatine bones

  3. Sphenoid, nasal and dentary bones

  4. Nasal, maxillae and ethmoid bone

Show answer
Correct Option: B
Explanation:

Palate is differentiated into two parts- (i) Hard Palate  and (ii) Soft Palate. 

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. These rugae prevent slipping out of the food from buccal cavity during mastication. These rugae are well developed in carnivorous animals. In rabbit, one pair opening of nasopalatine duct is present at the anterior part of hard palate, these connect the buccal cavity to the nasal passage. Some olfactory receptors are also found in nasopalatine duct, which are called as Jacobsons organ. It makes them aware of the smell of food while chewing.

Lower jaw is composed of ............. in rabbit.

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

  1. Dentary

  2. Maxilla

  3. Premaxilla

  4. Palatine

Show answer
Correct Option: A
Explanation:

Teeth are ecto-mesodermal in origin. Major portion of teeth arises from Dermis. Part of tooth present outside the gums only is derived from ectoderm or Epidermis (Enamel part). In human teeth of upper jaw are attached to the Maxilla bone. While teeth of lower jaw are attached to mandible jaw. But in rabbit upper incisors are attached to premaxilla. While upper premolars and molars attached to the maxilla bone. While lower teeth are attached to dentary bone. Dentary comprises of the lower jaw.