Page 192 - Atlas of Histology with Functional Correlations

D. It secretes glycosaminoglycans, proteoglycans, and adhesive

glycoproteins.

E. It influences lipid metabolism in adipose tissues.

4. What serves as a barrier to the passage of large molecules and
pathogens in the connective tissue?

A. Collagen fibers

B. Semifluid ground substance

C. Fibroblasts

D. Reticular fibers

E. Dense connective tissue layers

5. What fibers form supporting meshworks in organs such as lymph
nodes and the spleen?

A. Elastic fibers

B. Collagen fibers

C. Reticular fibers

D. Type I collagen fibers

E. All connective tissue fibers

ANSWERS

1. Correct Answer: D. It is a source of heat for hibernating animals and
newborns. During hibernation and in newborns, brown fat provides body
heat as a protective measure.

2. Correct Answer: A. The hormone leptin. This hormone is produced by

white adipose tissue cells and has an important role in food intake and
appetite by acting on the cells in the hypothalamus of the central nervous
system.

3. Correct Answer: C. It is the source of all connective tissue. The

undifferentiated mesenchyme cells give rise to various other cells, including
all connective tissue.

4. Correct Answer: B. Semifluid ground substance. Because of its viscosity,
ground substance serves as an efficient barrier to large molecules and
pathogens.

191