Salivary Gland and Saliva

Q.

What is the enzyme that breaks down starch?

Q.

Mention the role of ptyalin.

Q. Ptyalin of saliva acts in:

1. Slightly acidic medium
2. slightly alkaline medium
3. highly alkaline medium
4. all types of media

Q. Which one of the following is the largest salivary gland?

1. Sublingual
2. Submandibular
3. Parotid
4. Liver

Q. In which of the following salivary glands, is Stenson’s duct found?

1. Parotid gland
2. Submandibular gland
3. Sublingual gland
4. None of the above

Q. Name the enzyme that converts starch into maltose.

1. Amylase
2. Maltase
3. Lipase
4. Protease

Q. Assertion- Saliva in the mouth has antimicrobial activity
Reason- Lysozyme in the saliva helps to break the bacterial cell wall.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true and the reason is the incorrect explanation of the assertion
3. The assertion is true but the reason is false
4. Both assertion and reason are false

Q. Match the following columns
$\begin{array}{cc}Column-I& Column-II\\ A.Gobletcells& 1.Antibacterialagent\\ B.Lysozyme& 2.Mucus\\ C.Saliva& 3.HCl\\ D.Oxynticcells& 4.Sublingualgland\end{array}$

1. $\begin{array}{cccc}A& B& C& D\\ 3& 1& 4& 2\end{array}$
2. $\begin{array}{cccc}A& B& C& D\\ 1& 3& 4& 2\end{array}$
3. $\begin{array}{cccc}A& B& C& D\\ 2& 3& 1& 4\end{array}$
4. $\begin{array}{cccc}A& B& C& D\\ 4& 1& 2& 3\end{array}$
5. $\begin{array}{cccc}A& B& C& D\\ 2& 1& 4& 3\end{array}$

Q.

Which of the following ions are responsible for the activation of ptyalin?

1. $N{a}^{+}$

2. $C{l}^{-}$

3. $HC{O}_3^{-}$

4. $SC{N}^{-}$

Q.

Salivary glands are absent

1. In lower jaw

2. Below the tongue

3. In cheeks

4. In upper jaw

Q. Assertion- Saliva in the mouth has antimicrobial activity
Reason- Lysozyme in the saliva helps to break the bacterial cell wall.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true and the reason is the incorrect explanation of the assertion
3. The assertion is true but the reason is false
4. Both assertion and reason are false

Q. With reference to normal human beings, which of the following statements is not correct?

1. Human saliva is slightly alkaline
2. An adult may secrete 1-1.5 L of saliva per day
3. Saliva is secreted by six pairs of salivary glands in human beings
4. The salivary enzyme (ptayalin) breaks down cooked starch into maltose.

Q.

Match the correct options in reference to Salivary glands :

$\begin{array}{cc}ColumnI& ColumnII\\ i.\text{Parotid gland}& a.\text{Lingual lipase and starch}\\ ii.\text{Submandibular gland}& b.\text{Duct of Rivinus}\\ iii.\text{Sublingual gland}& c.\text{Stensen's duct}\\ iv.\text{Saliva}& d.\text{Wharton's duct}\\ v.\text{Ptyalin}& e.\text{pH 6-7}\end{array}$

1. i).$\to$ c., ii).$\to$ d., iii).$\to$ b., iv). $\to$ e., v).$\to$ a.

2. i).$\to$d., ii).$\to$b., iii).$\to$ e., iv).$\to$a., v).$\to$ c.

3. i).$\to$c., ii).$\to$d., iii).$\to$a., iv).$\to$b., v).$\to$e.

4. i).$\to$a., ii).$\to$e., iii).$\to$c., iv).$\to$d., v).$\to$b.

Q. The space between gums and lips is called__________

1. lingual frenulum
2. epiglottis
3. oral vestibule
4. uvula

Q. Match the following columns
$\begin{array}{cc}Column-I& Column-II\\ A.Gobletcells& 1.Antibacterialagent\\ B.Lysozyme& 2.Mucus\\ C.Saliva& 3.HCl\\ D.Oxynticcells& 4.Sublingualgland\end{array}$

1. $\begin{array}{cccc}A& B& C& D\\ 3& 1& 4& 2\end{array}$
2. $\begin{array}{cccc}A& B& C& D\\ 1& 3& 4& 2\end{array}$
3. $\begin{array}{cccc}A& B& C& D\\ 2& 3& 1& 4\end{array}$
4. $\begin{array}{cccc}A& B& C& D\\ 4& 1& 2& 3\end{array}$
5. $\begin{array}{cccc}A& B& C& D\\ 2& 1& 4& 3\end{array}$

Q. Which one of the following is the largest salivary gland?

1. Sublingual
2. Submandibular
3. Parotid
4. Liver

Q.

____% of starch is hydrolysed by salivary amylase

1. 60%

2. 30%

3. All starch is hydrolysed

4. 0%

Q. Mastication is the process of _______________________.

1. mixing of saliva with food only
2. chewing of food only
3. chewing and mixing of saliva with the help of tongue and teeth
4. None of the above

Q. Which one of the following pairs of food components in humans reaches the stomach totally undigested?

1. Protein
2. Starch
3. Cellulose
4. Fat