The function of the gap junction is to 

1. performing cementing to keep neighbouring cells together

2. faciliate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules

3. seperate two cells from each other

4. stop substance from leaking across a tissue

The terga sterna and pleura of cockroach body are joined by

1. cementing glue

2. muscular issue

3. arthrodial membrane

4. cartilage

Choose the corectly matched pair.

(1) Tendon-Specialised connective tissue

(2) Adipose tissue-Dense connective tissue

(3) Areolar tissue-Loose connective tissue

(4) Cartilage-Loose connective tissue

What external changes are visible after the last moult of a cockroach nymph?

1.  Mandible become harder

2.  Anal cerci develop

3.  Both fore wings and hind wings develop

4.  Labium develops

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

(1) Nervous system dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives

(2) Males bear a pair of short thread like anal styles

(3) There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut

(4) Grinding of food is carried out only by the mouth parts

Which of the following is correctly states as it happens in the common cockroach?

(1) Oxygen is transported by haemoglobin in blood

(2) Nitrogenous excretory product is urea

(3) The food is ground by mandibles and gizzard

(4) malpighian tubules are excretory organs projecting out from the colon

The kind of epithelium which forms the inner walls of blood vessels is 

(1) cuboidal epithelium

(2) columnar epithelium

(3) ciliated columnar epithelium

(4) squamous epithelium

The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is

(1) cuboidal

(2) glandular

(3) Ciliated

(4) squamous

The cell juctions called tight, adhering and gap junctions are found in

(1) muscular tissue

(2) connective tissue

(3) Epithelial tissue

(4) neural tissue

In which one of the following preparations are you likely to come across cell junctions frequently ?

(1) Ciliated epithelium

(2) Thrombocytes

(3) Tendon

(4) Hyaline cartilage