1. Which organ is responsible for balancing the amount of glucose floating aroun

Question

1. Which organ is responsible for balancing the amount of glucose floating around in the blood? (it stores excess glucose when there is too much and releases glucose into the bloodstream when there isn't enough)

Select one:

a. liver

b. pancreas

c. spleen

d. stomach

2. The gastrointstinal tract has 4 basic layers. Which layer is the one that comes in contact with the food that you eat?

Select one:

a. serosa

b. submucosa

c. muscularis

d. mucosa

3. Which digestive organ contains 3 layers of muscle tissue in the muscularis?

Select one:

a. esophagus

b. large intestine

c. stomach

d. anus

4.

The esophagus is the first organ in the digestive tract that secretes digestive enzymes to begin the chemical (molecular) breakdown of food.

Select one:

True

False

5.

Gastric ulcers are often caused by bacterial infection.

Select one:

True

False

6.

Lactose intolerance causes gas, bloating and stomach aches because undigested sugar molecules, called lactose, end up getting digested by bacteria in the intestines. When they digest it, they produce lots of gases.

Select one:

True

False

7. The lower esophageal sphincter prevents food in the stomach from backing up into the esophagus.

Since the esophagus is not equipped to handle the harsh acids in the stomach, when food (mixed with stomach acids) does back up into the esophagus, you get symptoms such as heart burn. This is called gastroesophageal reflux (or "reflux").

When reflux is left untreated for many years, the person becomes a trisk for esophageal cancer. This is because the esophagus gets "burned" by the acids over and over again which can eventually trigger the development of cancerous cells.

Select one:

True

False

8.

Peristalsis is defined as the rhythmic contractions of the digestive system that pushes food along the digestive tract.

Select one:

True

False

Explanation / Answer

Q1. Answer a) Liver

The liver stores glucose in the form of glycogen by phosphorylating the glucose to glucose-6-phosphate and which further form the polymer.This stored glucose is utilised when the body is in need of energy.

Q2. Answer d) Mucosa

The stomach has four layers namely mucosa the innermost layer which secretes gastric juices, sub-mucosa the layer below mucosa which provides the support to the mucosa. Muscularis Externa, as the name, suggests holds the muscles which help in the digestive movements and serosa the outermost layer.

Q3. Answer c) stomach

All the organs in the digestive system have two layers in the muscle except in stomach apart from the circular and longitudinal muscles there is an extra oblique layer of muscle.

Q4. Answer: False

The oesophagus is the not the first organ to secrete digestive juices but it is the buccal cavity which produces salivary amylase and starts the digestion of carbohydrates.

Q5. Answer: True

Gastric ulcer is a perforation in the wall of the stomach. This is caused by an acid-resistant bacterium Heliobacter pylori.

Q6. Answer is true

Lactose like glucose is a carbohydrate which can be digested by lactase but in some people who lack this enzyme they cannot digest it, instead the bacteria in the intestine ferment this sugar and produce gas which leads to bloating and pain.

Q7.Answer: True

Oesophagus, unlike the stomach, lacks the extent of repairing process when attacked by the acids from the stomach, This leads to the extensive damage to the lining and mutation of the cells leading to the production of mutated cells.

Q8. Answer: True

Peristalsis is the alternating contraction and relaxation of the walls of the digestive to propel the solid food forward in the gut.

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