Stomach

Q.

Identify the cells whose secretions protect the lining of the gastrointestinal tract from various enzymes.

1. Chief cells.

2. Goblet cells.

3. Oxyntic cells.

4. Duodenal cells.

Q. Read the following statements and choose the option which correctly states each statement as $\text{true (T)}$ or $\text{false (F)}$.
a. The final step in digestion occurs very close to the mucosal epithelial cells of stomach.
b. Rennin is a proteolytic enzyme and helps in the digestion of milk sugar.
c. The stomach stores the food for 4-5 hours.
d. The egestion of faeces to the outside through the anal opening is called excretion.
$\begin{array}{ccccc}& \text{a}& \text{b}& \text{c}& \text{d}\\ \text{(1)}& \text{F}& \text{F}& \text{T}& \text{F}\\ \text{(2)}& \text{T}& \text{T}& \text{T}& \text{T}\\ \text{(3)}& \text{T}& \text{T}& \text{T}& \text{F}\\ \text{(4)}& \text{F}& \text{T}& \text{T}& \text{T}\end{array}$

Q. The GIT is controlled by

1. its own intrinsic nervous system
2. sympathetic nervous system
3. parasympathetic nervous system
4. all of the above

Q. Mark the wrong match.

1. Structure	Function
   Caecum	Small blind sac which hosts some symbiotic micro-organisms

2. Structure

   Function

   Vermiform appendix

   A narrow finger like tubular projection, which is a vestigial organ

3. Structure

   Function

   Descending part of colon

   Opens into the rectum which opens out through the anus

4. Structure

   Function

   Stomach

   Located in the lower right portion of the abdominal cavity

Q. In stomach process of digestion is accomplished by mechanical chemical processes. Evaluate the statement .

Q. Distinguish between intracellular and extracellular digestion?

Q. Read the following statements w.r.t. humans and choose the correct option.
a. Enamel is the hardest tissue of the body.
b. The upper and lower surface of tongue has papillae.
c. The tongue is attached to the floor of oral cavity by the frenulum.
d. The pyloric portion of stomach opens into the first part of small intestine.

Q. How many signals does the human nervous system carry throughout the body

Q.

Oesophagus opens into

1. Fundus

2. Cardiac stomach

3. Pyloric stomach

4. None of these

Q.

name & mention the function of each of three major kinds of cells in the gastric glands ?