
Which of the following connective tissue which is capable of considerable extension and recoil?

Important Questions on Structural Organisation in Animals

Study the following statements and identify the correct statements-
Microglial cells keep the cerebrospinal fluid in the ventricles of brain in constant circulation
Arrector pili muscles are unstriated muscles
Basophils remove antigen-antibody complexes from the blood
Perichondrium is absent in fibrous cartilage


Column – I | Column – II | ||
a. | Fibrinogen | i. | Osmotic balance |
b. | Globulin | Ii. | Blood clotting |
c. | Albumin | iii. | Defense mechanism |



Study the following statements
Compound epithelium forms the lining of the larger pancreatic ducts as stratified cuboidal epithelium
Cartilage is a vascular tissue surrounded by fibrous connective tissue sheath called perichondrium
Gap junctions in cardiac muscles permit electrical impulses to be conducted rapidly
Myelinated nerve fibres are found in grey matter of the central nervous system
Among the above, identify incorrect statements

Match the type of cells in Column with the organs they are part of, listed in Column
Column | Column | ||
P. | Chondroblast | i. | Bone |
Q. | Osteoclast | ii. | Brain |
R. | Microglia | iii. | Cartilage |
S. | Pneumocyte | iv. | Lung |
Choose the CORRECT combination.



Which one of the following is incorrect regarding WBCs?
(a) Monocytes migrate from the bloodstream to other tissues and differentiate into tissue-resident macrophages, Kupffer cells in the liver.
(b) Eosinophils modulate allergic inflammatory responses.
(c) Basophils release histamine for inflammatory response.
(d) Natural killer cells are a type of phagocytic erythrocytes.






Match the following:
Column I | Column II |
A. Astrocytes | 1. Resting macrophages. |
B. Microglia | 2. Precursors of the myelin sheath. |
C. Oligodendrocytes | 3. Set of currents in cerebrospinal fluid. |
D. Ependymal cells. | 4. Protects neurons of the brain from toxins. |




