Researchers analyzing gene expression in connective tissue samples are likely to obtain gene expression profiles for all of the following tissues EXCEPT:

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11ecba2d_1012_4485_a3bf_5977edc19bf4_MD0008_00 There are four main tissue types in the human body: epithelial, muscle, connective, and nervous tissue. Connective tissue, consisting of specialized cells that secrete and maintain an extensive extracellular matrix, has several functions. Connective tissue serves to attach tissues and organs to one another and is essential for the protection and support of surrounding structures. In the given scenario, researchers are analyzing gene expression in connective tissue samples. Therefore, they may obtain gene expression profiles for several subtypes of connective tissue, including: Bone, which makes up the skeletal system and provides structural support and physical protection for internal organs as well as a framework for mobility. Bone comprises osteoblasts (matrix-secreting cells that build bone), osteoclasts (bone-degrading cells), and osteocytes (mature bone cells) (Choice A). Blood, which transports gases, cells (ie, erythrocytes, leukocytes), nutrients, wastes, and other materials (eg, hormones) throughout the body via blood vessels. Although mature erythrocytes have no nucleus, gene expression profiles can still be obtained from leukocytes (Choice B). Adipose tissue, which is responsible for the storage of fats as well as providing cushioning for organs and insulation to prevent heat loss (Choice C). Muscle tissue, classified into three types, is under the control of the nervous system and allows for movement. Although connective tissue comes into contact with muscle tissue, muscle is not considered to be a type of connective tissue. Therefore, researchers analyzing gene expression in connective tissue samples would not obtain gene expression profiles for muscle tissues. Educational objective: The body consists of four types of tissue: epithelial, muscle, connective, and nervous tissue. Connective tissue provides protection and support for organs. Types of connective tissue include bone, blood, and adipose tissue.

Researchers Analyzing Gene Expression in Connective Tissue Samples Are Likely