Tag: evs - i

Questions Related to evs - i

Among the below given minerals, Potassium Chloride is extracted from
a) Sylvite
b) Carnallite
c) Potash

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Only a

  2. Only a and b

  3. Only b and c

  4. All a,b and c

Show answer
Correct Option: D
Explanation:

Potassium Chloride can be extracted from-

$a.$ Sylvite (Potassium Chloride in natural mineral form)
$b.$ Carnallite $(KCl\cdot MgCl _2\cdot 6H _2O)$
$c.$ Potash (rich in potassium chloride)

What would happen if fangs of venomous snake are pulled out ? They will

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Get replaced

  2. Become double

  3. Be safe to handle

  4. Never get replaced

Show answer
Correct Option: A
Explanation:

In general teeth of reptiles (except crocodile) are acrodont. Thus, teeth are fixed over bone and not embedded in sockets in jaws. The fangs of snakes are modified maxillary teeth of upper jaw. If pulled out these teeth can be replaced.

Premolar are absent in 

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Adult teeth in man

  2. Mammalian teeth in general

  3. Permanent teeth of man

  4. Deciduous teeth of man

Show answer
Correct Option: D
Explanation:

Humans have two sets of teeth- the deciduous or milk teeth and the permanent teeth. The milk premolars are absent in infants. Thus, dental formula of infants are 2102/ 2102 as against 2123/ 2123 in adult humans.

Hyperbilirubinemia is

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

  1. Increased bilirubin in blood

  2. Increased bilirubin in urine

  3. Reduced concentration of blood bilirubin

  4. Reduced bilirubin in urine

Show answer
Correct Option: A
Explanation:

Hyperbilirubinemia is excessive bilirubin in blood. It is also called jaundice. It leads to deposition of bilirubin in mucous membrane, sclera and skin so that the patient looks yellow or icterus. Urine is yellow. It is caused by obstruction in bile duct, excessive hemolysis, or viral infection.

In mammals, the teeth are 
(i) Of different types
(ii) Embedded in the cup-like socket of the jaw bones
(iii) Only two sets, present throughout life
These conditions are referred as 

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Heterodont, thecodont and diphyodont

  2. Thecodont, heterodont and diphyodont

  3. Diphyodont, thecodont and heterodont

  4. Heterodont, diphyodont and thecodont

  5. Thecodont, diphyodont and heterodont

Show answer
Correct Option: A
Explanation:
In mammals, the teeth is a heterodont as they have for different variety of teeth like incisors, canines, premolars and molars. The teeth is embedded in the sockets so they are also known as thecodont. Initially mammals have milk teeth, which is further replaced by the milk teeth. The two sets of teeth is known as diphyodont.
So, the correct answer is option A.

Number of teeth  which are monophyodont in man are

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. 4

  2. 22

  3. 32

  4. 12

Show answer
Correct Option: D
Explanation:

Majority of mammals including human being forms two sets of teeth during their life, a set of temporary, milk or deciduous teeth replaced by a set of permanent or adult teeth. This type of dentition is called diphyodont. An adult human has 32 permanent teeth, which are of four different types, namely, incisors (I), canine (C), premolars (PM) and molars(M). Arrangement of teeth in each half of the upper and lower jaw in the order I, C, PM, M is represented by a dental formula which in humanis 2123/ 2123. In children the premolars and last molar are absent. Hence the child has dental formula 2102/ 2102. The number of teeths according to this dental formula will be 20. These teeth will be diphyodont and (32-20) or 12 teeth will be monophyodont.

The hardest constituent of the tooth is

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Enamel

  2. Dentine

  3. Bone

  4. Pulp

Show answer
Correct Option: A
Explanation:

Enamel is the hardest substance in the human body and contains the highest percentage of minerals, 96%, with water and organic material. The primary mineral is hydroxyapatite, which is a crystalline calcium phosphate.

How many teeth in man grows twice in life?

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. 32

  2. 28

  3. 20

  4. 12

Show answer
Correct Option: C
Explanation:

Majority of mammals including human being forms two sets of teeth during their life, a set of temporary, milk or deciduous teeth replaced by a set of permanent or adult teeth. This type of dentition is called diphyodont. An adult human has 32 permanent teeth, which are of four different types, namely, incisors (I), canine (C), premolars (PM) and molars(M). Arrangement of teeth in each half of the upper and lower jaw in the order I, C, PM, M is represented by a dental formula which in human is 2123/ 2123. The premolars and last molars are absent in children. Thus the teeth which grow twice are incisors, canines and two molars i.e., a total of 20 teeth.

Amount of water in enamel is

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. 90 - 92%

  2. 75 - 80%

  3. 40 - 50%

  4. $\approx $ 3%

Show answer
Correct Option: D
Explanation:

Enamel is the hardest material of animal kingdom. Enamel is ectodermal. It is secreted by Ameloblast cells of the ectoderm. lt has maximum amount of inorganic salt (96%) in It. Inorganic salt are mainly found in the form of phosphate and carbonate of Ca, Mg, Na and K. 3% of water is found in the enamel. Along with it Keratin and  ossein are also found in teeth. Ossein is a protein of bones, remaining part of tooth develops from mesoderm of embryo.

Cheek teeth are

evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

  1. Inscisors and canines

  2. Canines and premolars

  3. Premolars and molar

  4. Canines and molars

Show answer
Correct Option: C
Explanation:

Cheek teeth or post canines comprise the molar and premolar teeth in mammals. Cheek teeth are multicuspidate (having many cusps or tubercles). Mammals have multicuspidate molars.