Fructose is absorbed into the blood through mucosa cells of intestine by the process called:

1. Active transport

2. Facilitated transport

3. Simple diffusion 

4. Co-transport mechanism

The layer of cells that secrete enamel of a tooth is:

1. denoblast

2. ameloblast

3. osteoblast

4. odontoblast

Which of the following is mismatched?

1. Vitamin-K-Beri-Beri

2. Vitamin-D-Rickets

3. Vitamin-C-Scurvy

4. Vitamin-A-Xerophthalmia

Space in the jaw bone unoccupied by teeth is called:

1. Dentine

2. Diastema

3. Enamel

4. Crown

Identify the correct set, which shows the name of the enzyme from where it is secreted and the substrate upon which it acts.

1. Ptyalin- Intestine- Maltose

2. Ptylin- Pancreas- Lipid

3. Pepsin- Stomach wall- Caesin

4. Chymotrypsin- Salivary gland- Lactose

Match the following structures with their respective location in organs:

Select the correct option from the following:
 

Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes:

1. Duodenal cells

2. Chief cells

3. Goblet cells

4. Oxyntic cells