Esophageal Digestion

Q.

Which Body Part Connects the Mouth to the Stomach?

Q. All of the following statements concerning the esophagus are true EXCEPT:

1. The esophagus is a muscular tube, 25 cm in length that originates at the laryngopharynx and ends at the stomach
2. The esophagus produces mucus and digestive enzymes to initiate the breakdown of proteins
3. The lower esophageal sphincter muscle contracts to prevent regurgitation of gastric contents
4. The esophagus transports food from the oral cavity to the stomach by peristalsis

Q. Choose an incorrect statement from the following statements.

1. Large intestine absorbs water from undigested food
2. Absorption of electrolytes, water and some amino acids occur mainly in the stomach
3. Mucous in large intestine lubricates faecal matter
4. Feces are temporarily stored in the rectum

Q.

What would happen when salivary amyla act on starch in mouth as well as in stomach?

Q. The process that is involved with the movement of food in the oesophagus is called ________.

1. digestion
2. absorption
3. peristalsis
4. defecation

Q. Very short answer type.
Name three enzymes of small intestine, which catalyze the hydrolysis of carbohydrates

Q. What is digestion? Explain the process of digestion in the mouth cavity and stomach. Add a note on peristalsis.

Q. Short / Long answer type questions.
If the salivary glands were unable to secrete amylase, what effect would this have on starch digestion)

Q. Which of the following secretions of the alimentary canal in human DO NOT contain any enzymes?

1. Salivary Juice
2. Gastric juice
3. Bile juice
4. Pancreatic juice

Q. The digestion of food in the oesophagus happens due to

1. Salivary Amylase
2. Renin
3. Acid reflux from the stomach
4. Pepsin

Q. The process that is involved with the movement of food in the oesophagus is called ________.

1. digestion
2. absorption
3. peristalsis
4. defecation

Q. Carbohydrate digestion occurs first in which structure?

1. Mouth
2. Intestine
3. Stomach
4. None of the above

Q. The rhythmic muscular contraction that pushes food from the oesophagus into the stomach is called .

1. peristalsis
2. ingestion
3. digestion

Q. Choose the correct options:

1. Abdominal pressure is lower than oesophageal pressure. That is why, bolus enters stomach and sphincter allows one way movement of bolus.
2. There is momentary lowering of the pressure in the proximal region of the stomach to hold more volume of bolus.
3. When bolus is inside the stomach, the LES contracts to prevent the backward movement of the bolus towards the oesophagus.
4. Gastric reflux happens when gastric juice tends to move upwards towards the lower pressure region in oesophagus and is prevented by cardiac sphincter.