Structural Organisation in Animals - Online Test

Q1. Fibroblasts, macrophages and mast cells are present in
Answer : Option D
Explaination / Solution:

Apart from being connective tissue, Areolar tissue is also protective in nature. It has large number of fibroblast cells which produce fibres. Mast cells, plasma cells and macrophages help to protect against pathogens and aid in tissue repair.

Q2. The fibre that can't be made to contract merely by thinking about it, is the
Answer : Option B
Explaination / Solution:

Smooth muscles are ‘involuntary’ muscles as they can't be directly controlled. We usually are not able to make it contract merely by thinking about it as we can do with skeletal muscles. Involuntary muscles are under control of medulla oblongata and part of cerebrum. Smooth muscles are spindle shaped or fusiform, uninucleated and unstraited fibres.The wall of internal organs such as the blood vessels, stomach and intestine contains this type of muscle tissue.

Q3. Identify the figure given below:

Answer : Option C
Explaination / Solution:

The figure is identified as salivary gland. It is multicellular and is lined with glandular epithelium cells. These types of cells are specialized in production and release of particular kind of digestive juices or sweat or oil. Salivary gland secretes alkaline fluid called saliva.

Q4. Adipose tissue belongs to which tissue?
Answer : Option C
Explaination / Solution:

The connective tissues have soft tissues to specialised types, which include cartilage, bone, adipose, and blood.

Q5. The junctions which help to stop substances from leaking across a tissue is
Answer : Option A
Explaination / Solution:

Tight junctions hold cells together. They are narrow belts that circle around the upper part of lateral surfaces of the adjacent epithelial cells to create a fusion point. They stop substances from leaking across a tissue as they prevent passage of molecules and ions through space between adjacent cells.

Q6. The most abundant type of animal tissue in the complex animals is
Answer : Option B
Explaination / Solution:

The most abundant type of animal tissue connective tissue as it forms variety of tissues such as blood, bone, cartilage, adipose, lymph, tendon and ligament. These connective tissue types perform wide range of functions in the animal body such as giving support, packing, repairing, storing of fat, connecting different organs, etc.

Q7. The formation of erythrocytes in foetus takes place in
Answer : Option B
Explaination / Solution:

In the early fetus, erythropoiesis takes place in the mesodermal cells of the yolk sac. Later, the production of RBCs starts in the fetal liver and increases till the 2nd trimester. After this, the rate of synthesis begins to decline in liver as erythropoiesis increases in the bone marrow. RBCs are still produced in the liver for approximately 1 week after birth.

Q8. Study of tissues is called
Answer : Option C
Explaination / Solution:

Study of organisms at tissues level is called histology.It includes study of tissue structure, origin, location and function.

Q9. Epithelium covering in tongue is
Answer : Option C
Explaination / Solution:

Tongue is covered by non-keratinized squamous epithelial tissues having taste buds of different kinds in different regions of tongue.

Q10. Two animal cells are interconnected by
Answer : Option B
Explaination / Solution:

Two animal cells are interconnected by desmosomes, through which exchange of materials takes place between two cells. It is formed from protein plaques in the cell membranes linked by filaments.