Question

Which of the following doesn’t belong?

(Group of answer choices)

1. Type 1 alveolar cells.

2. zymogenic cells.

3. enteroendocrine cells

4. oxyntic cells.

5. goblet cells.

Enamel:

1. is made of the same material as bone.

2. is the hardest substance in the human body.

3. none of the above.

4. all of the above.

5. forms the surface of the crowns of teeth.

Pharyngeal constrictor muscles:

1. assist with gustation.

2. are used mainly used in relaxed expiration.

3. assist with mastication.

4. none of the above

5. are used for deglutition.

Answer 1

ANS 1..(1)Type 1 alveolar cells

ANS 2...(4) All of the above

ANS 3...(5) are used for deglutition

Explanation::

(1)All the given cells in options were involved the process of digestion after releasing Chemicals and hormones which helps in breaking down of food particles to smallest part.

Zymogenic cells also called peptic cells which release pepsinogen converted to pepsin after getting HCl in stomach and helps in digestion of proteins.

Oxyntic cells are also called parietal cells, helps in the secretion of HCl in stomach and provides acidic environment which results into the conversion of pepsinogen to pepsin.

Goblet cells present in stomach , helps in secretion of mucus which protects the wall of stomach from acidic environment.

Enteroendocrine cells present in GI tract of digestive system ,helps in releasing hormones which controls the glucose level,food intake and also stomach emptying in the process of digestion.

Alveolar cells type 1 is involved in the process of respiration ,which mainly helps in exchange of gases (oxygen and carbon dioxide) in alveolus.

(2) Enamel is the hardest substance in the body and also made of calcium ,phosphorus and minerals.The composition of calcium is in the form of calcium hydroxyapatite makes enamel strongest as comparison to bones. Enamel also provides outer covering of tooth in crown shape.

So,all the options is correct regarding with enamel.

(3) Pharyngeal constrictor muscle present inside the pharynx helps in the movement of food in the form of bolus from pharynx to oesophagus in the process of deglutition. It also helps in the peristaltic movement of food.

It doesn't helps in mastication and gustation because gustation is a sensory response of taste normally provided by taste buds present in tongue and mastication of food generally done by mandibles or lower jaws i.e they helps in chewing of food.