What function do fibroblasts serve in connective tissue?成纤维细胞在结缔组织中起什么作用？
A. Perform phagocytosis.
B. Secrete histamine to initiate inflammatory response.
C. Secrete proteins that become fibres in the ground substance.
D. Produce a calcified matrix.
E. Produce heparin to prevent blood clots.
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The dermis of the skin is made up of a layer of:皮肤的真皮由一层组成
A. dense regular connective tissue.
B. dense irregular connective.
C. elastic connective tissue.
D. adipose tissue.
Dense Regular Connective tissue is found in:密集常规结缔组织见于：
A. tendons and fascia.
B. basement membranes.
C. floor of the mouth.
D. lining of our lips.
Areolar tissue is found beneath: Areolar组织在下面发现：
A. muscle tissue.
B. nervous tissue.
C. epithelial tissue.
D. lymphatic tissue.
Which of the following groups of cells that are found in loose connective tissue, are considered as fixed cells?在疏松结缔组织中发现的哪一组细胞，被认为是固定细胞？
Adipocytes, mast cells, melanocytes.
B. Plasma cells, white blood cells, mast cells.
C. Adipocytes, fibroblasts and plasma cells.
D. Melanocytes, fibroblasts and white blood cells.
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