Fibroblasts are the primary cells responsible for secreting collagen and elastin fibers in connective tissues.
Cartilage, Bone, Adipose tissue, and Areolar tissue: All contain fibroblasts or related cell types (chondrocytes in cartilage, osteoblasts in bone, adipocytes in adipose tissue) that produce collagen or elastin fibers.
Blood: Blood does not contain fibroblasts. Its matrix (plasma) contains various proteins, but these are not secreted by blood cells in the same way that fibroblasts secrete collagen and elastin.
List - I | List – II | ||
A. | Squamous Epithelium | i. | Goblet cells of alimentary canal |
B. | Ciliated Epithelium | ii. | Inner lining of pancreatic ducts |
C. | Glandular Epithelium | iii. | Walls of blood vessels |
D. | Compound Epithelium | iv. | Inner surface of Fallopian tubes |
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
Predict the major product $ P $ in the following sequence of reactions:
(i) HBr, benzoyl peroxide
(ii) KCN
(iii) Na(Hg), $C_{2}H_{5}OH$
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: