Structural Organisation in Animals

Mast cells of connective tissue contain -

1. Heparin and calcitonin
2. Heparin and histamine
3. Vasopressin and relaxin
4. Serotonin and melanin

Ommatidia serve the purpose of photoreception in

1. cockroach
2. frog
3. humans
4. sunflower.

Which one of the following contains the largest quantity of extracellular material ?

1. Stratified epithelium
2. Myelinated nerve fibres
3. Striated muscle
4. Areolar tissue

Which cartilage is present at the end of long bones?

1. Calcified cartilage
2. Hyaline cartilage
3. Elastic cartilage
4. Fibrous cartilage

Melanin protects from:

1. Infrared rays
2. U.V. rays
3. Visible rays
4. X-rays

During an injury, the nasal septum gets damaged. For its recovery, which cartilage is preferred?

1. Fibrous cartilage
2. Elastic cartilage
3. Calcified cartilage
4. Hyaline cartilage

Which cells do not form a layer and remain structurally separate?

1. Nerve cells
2. Epithelial cells
3. Gland cells
4. Muscle cells

What happens if bone of frog is kept in dilute hydrochloric acid?

1. Will become flexible
2. Will turn black
3. Will break into pieces
4. Will shrink

Proteoglycan in cartilages which is part of polysaccharide is

1. Ossein
2. Cartilegen
3. Chondroitin
4. Casein

Characteristic of simple epithelium is that they

1. Continue to divide and help in organ function
2. They are arranged indiscriminately
3. They make a definite layer
4. None