Tag: process of digestion

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Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Digestion of starch starts from

  1. Stomach

  2. Intestine

  3. Oesophagus

  4. Buccal cavity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbohydrate digestion begins in the mouth or buccal cavity. The salivary glands in the mouth secrete saliva, which helps to moisten the food. The food is then chewed while the salivary glands also release the enzyme salivary amylase, which begins the process of breaking down the carbohydrate food.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Chewing is an example of

  1. Chemical digestion

  2. Mechanical digestion

  3. Involuntary action

  4. Hydrolysis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are two kinds of digestion: mechanical and chemical. In mechanical digestion, food particles are physically broken down into smaller pieces. It begins in the mouth where the food is chewed. 

Therefore, the correct answer is option B.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

The accessory organs in the digestive system are

  1. Tongue, Pancreas, Liver, Gallbladder and Salivary glands

  2. Tongue, Pancreas, Small intestine, Gallbladder and Salivary glands

  3. Tongue, Small intestine , Large intestine, Gallbladder and Salivary glands

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An organ that helps with digestion but is not part of the digestive tract. The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder. Chemical digestion in the small intestine relies on the activities of three accessory digestive organs the liver, pancreas, and gallbladder. The digestive role of the liver is to produce bile and export it to the duodenum. The gallbladder primarily stores, concentrates, and releases bile. The pancreas produces pancreatic juice, which contains digestive enzymes and bicarbonate ions, and delivers it to the duodenum.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Pharyngeal tonsils are

  1. Near surface of tongue

  2. At the back of throat

  3. Active throughout life

  4. Adenoids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Adenoids, also called Pharyngeal tonsils, a mass of lymphatic tissue, similar to the tonsils, that is attached to the back wall of the nasal pharynx (i.e., the upper part of the throat opening into the nasal cavity proper). An individual fold of such nasopharyngeal lymphatic tissue is called an adenoid.

So, the correct option is 'Adenoids'.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

A flap-like muscular valve controls the movement of air and food is ..........

  1. Nostrils

  2. Uvula

  3. Epiglottis

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The epiglottis is a leaf-shaped flap-like muscular valve made up of cartilage. It is located behind the tongue. The function of epiglottis is to prevent the entry of food in the windpipe and it seal off windpipe during eating.
So, the correct answer is 'Epiglottis'.
Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Why can a person not swallow food and talk at the same time?

  1. The brain cannot control two activities at the same time.

  2. In order to speak, air must come through the pharynx to form sounds.

  3. In order to swallow, the epiglottis must close off the larynx (trachea).

  4. Both B and C are correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Speaking requires air to pass through the larynx, while swallowing requires the epiglottis to close off the larynx to protect the airway. These two actions are mechanically incompatible.