Structural Organisation in Animals

Which one of the following is the true description about an animal concerned?

1. Frog — Body divisible into three regions-head, neck and trunk
2. Rat — Left kidney is slightly higher in position than the right one
3. Earthworm — The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
4. Cockroach — 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)

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

1. Thrombocytes
2. Tendon
3. Hyaline cartilage
4. Ciliated epithelium

Bowman's glands are found in

1. juxtamedullary nephrons
2. olfactory epithelium
3. external auditory canal
4. cortical nephrons only

Areolar connective tissue joins-

1. Bones with muscles
2. Bones with bones
3. Fat body with muscles
4. Integument with muscles

Mast cells secrete-

1. Histamine
2. Hippurin
3. Haemoglobin
4. Myoglobin

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