Deglutition

Q.

Cardiac sphincter is in the heart. Yes or no? Give reason.

Q.

Why do we get hiccups?

Q.

Name the three parts of pharynx and the structures each of it is associated with.

Q. _____________ serves as a part of both the digestive system and the respiratory system.

1. Trachea
2. Pharynx
3. Larynx
4. Oesophagus

Q.

Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of:

1. Neck

2. Epiglottis

3. Tongue

4. Diaphragm

Q.

The opening of the larynx into the pharynx is guarded by

1. Syrinx

2. Epiglottis

3. Tracheal wall

4. All of these

Q. Match the following:

a. Amphibia	i. Air bladder
b. Mammals	ii. Cartilaginous notochord
c.Chondrichthyes	iii. Mammary glands
d. Osteichthyes	iv. Pneumatic bones
e.Cyclostomata	v. Dual habitat
f. Aves	vi. Sucking and circular mouth without jaws

Q. Two friends are eating in a restaurant. One of them suddenly starts coughing and choking on his food. This is due to the improper movement of

1. diaphragm
2. neck
3. tongue
4. epiglottis

Q.

Peristaltic movements are found in different parts of the alimentary canal. In which one of these there is the least peristalsis?

1. Rectum

2. Stomach

3. Duodenum

4. Oesophagus

Q. The structure that prevents the entry of food into trachea during deglutition in mammals is

1. Palate
2. larynx
3. pharynx
4. epiglottis

Q. __________ is a hanging tear drop shaped structure, which closes the nasopharynx during swallowing.

1. Epiglottis
2. Glottis
3. Soft palate
4. Uvula

Q. Match the following
$\begin{array}{cc}\text{Parts of pharynx}& \text{Description}\\ \text{1. Nasopharynx}& \text{i) It is the bottom part of the pharynx and it guides the food and}\\ & \text{air to pass through different passages.}\\ \text{2. Oropharynx}& \text{ii) It is the upper part of the pharynx and is connected}\\ & \text{to the nasal cavity.}\\ \text{3. Laryngopharynx}& \text{iii) It is the middle region of the pharynx and is connected}\\ & \text{to the mouth.}\end{array}$

1. 1-i, 2-ii, 3-iii
2. 1-ii, 2-iii, 3-i
3. 1-iii, 2-ii, 3-i
4. 1-ii, 2-i, 3-iii

Q. Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing food. This coughing would have been due to improper movement of:

1. Tongue
2. Epiglottis
3. Diaphram
4. Neck

Q. Succus entericus is secreted by which one the following simple tubular glands?

1. Both A and B
2. Crypts of Lieberkuhn
3. Gastric gland
4. Glands of moll

Q. The specialised structure which prevents the entry of food into the respiratory tract during swallowing is

1. oesophagus
2. epiglottis
3. pharynx
4. larynx

Q. Read the following four statements carefully.
(i) Ventral respiratory group of neurons of medulla oblongata can cause both inspiration and expiration.
(ii) The part of the respiratory system starting with the external nostrils up to the terminal bronchioles constitutes the respiratory or exchange part of the respiratory system.
(iii) During swallowing epiglottis can be covered by a thin elastic cartilaginous flap called glottis to prevent the entry of food into the larynx.
(iv) Binding of oxygen with haemoglobin is primarily related to partial pressure of $O_2$.
Which of the above two statements are correct?

1. (ii) and (iii)
2. (i)and(ii)
3. (iii) and (iv)
4. (i) and (iv)

Q. Match the following
$\begin{array}{cc}\text{Parts of pharynx}& \text{Description}\\ \text{1. Nasopharynx}& \text{i) It is the bottom part of the pharynx and it guides the food and}\\ & \text{air to pass through different passages.}\\ \text{2. Oropharynx}& \text{ii) It is the upper part of the pharynx and is connected}\\ & \text{to the nasal cavity.}\\ \text{3. Laryngopharynx}& \text{iii) It is the middle region of the pharynx and is connected}\\ & \text{to the mouth.}\end{array}$

1. 1-iii, 2-ii, 3-i
2. 1-ii, 2-i, 3-iii
3. 1-i, 2-ii, 3-iii
4. 1-ii, 2-iii, 3-i

Q.

Regarding the assertion and reason; choose the correct option.
Assertion [A]: Muscular contraction in the alimentary canal is called peristalsis.
Reason [R]: Deglutition has three phases - (Oral phase, Pharyngeal phase and Esophageal phase).

1. Assertion [A] is True and Reason [R] is False.

2. Reason [R] is True and Assertion [A] is False.

3. Assertion [A] is True and Reason [R] is True, and [R] is a correct explanation to [A].

4. Assertion [A] is True and Reason [R] is True, but [R] is not a correct explanation to [A].

Q.

Food in the buccal cavity and stomach are called as____ ___and _________ respectively.

1. bolus and chyme

2. chyme and bolus

3. chile and bolus

4. bolus and chile

Q.

Food in the buccal cavity and stomach are called as____ ___and _________ respectively.

1. bolus and chyme

2. bolus and chile

3. chyme and bolus

4. chile and bolus

Q. The cartilaginous flap that prevents the entry of food into the glottis during swallowing is called___________

1. trachea
2. rugae
3. epiglottis
4. uvula

Q.

Movement is not regulated by sphincter or valve during

1. Movement of chyme

2. Movement of food from oesophagus to stomach

3. Release of bile into duodenum

4. Movement of bolus into pharynx

Q. The function of tracheal cilia is to

1. Pass mucus in
2. Pass air out
3. Pass air in
4. Pass mucus out

Q.

Regarding the assertion and reason; choose the correct option.
Assertion [A]: Muscular contraction in the alimentary canal is called peristalsis.
Reason [R]: Deglutition has three phases - (Oral phase, Pharyngeal phase and Esophageal phase).

1. Assertion [A] is True and Reason [R] is False.

2. Reason [R] is True and Assertion [A] is False.

3. Assertion [A] is True and Reason [R] is True, and [R] is a correct explanation to [A].

4. Assertion [A] is True and Reason [R] is True, but [R] is not a correct explanation to [A].

Q. The cartilaginous flap that prevents the entry of food into the glottis during swallowing is called___________

1. trachea
2. rugae
3. epiglottis
4. uvula

Q.

What is peristalsis?

Q. Boojho and Paheli were eating their food hurriedly so that they could go out and play during the recess. Suddenly, Boojho started coughing violently. Think of the reasons why he was coughing and discuss with your friends.

Q. What route does carbon dioxide follow as it leaves the body?

1. $Pulmonaryvein\to alveolus\to bronchus\to bronchiole$
2. $Pulmonaryartery\to alveolus\to bronchus\to bronchiole$
3. $Pulmonaryvein\to alveolus\to bronchiole\to bronchus$
4. $Pulmonaryartery\to alveolus\to bronchiole\to bronchus$

Q. From the sacculus arises a narrow tube called

1. Ductus endolymphaticus
2. Endolymphatic sac
3. Cochlea
4. None of the above

Q. __________ is a hanging tear drop shaped structure, which closes the nasopharynx during swallowing.

1. Uvula
2. Epiglottis
3. Glottis
4. Soft palate