The function of the gap junction is to?

1.	Perform cementing to keep neighbouring cells together
2.	Facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules
3.	Separate two cells from each other
4.	Stop substances from leaking across a tissue

The terga,sterna and pleura of the cockroach body are joined by:

1. cementing glue
2. muscular tissue
3. arthrodial membrane
4. cartilage

Choose the correctly matched pair:

1. Tendon-Specialized connective tissue

2. Adipose tissue-Dense connective tissue

3. Areolar tissue- Loose connective tissue

4. Cartilage- Loose connective tissue

Choose the correctly matched pair:

1. Inner lining of salivary ducts- Ciliated epithelium

2. Moist surface of buccal cavity- Glandular epithelium

3. Tubular parts of nephrons- Cuboidal epithelium

4. Inner surface of bronchioles- Squamous epithelium

Compared to those of humans, the erythrocytes in frogs are:

1. Without nucleus but with haemoglobin

2. Nucleated and with haemoglobin

3. Very much smaller and fewer

4. Nucleated and without haemoglobin

Select the correct statement from the ones given below with respect to Periplaneta americana.