Unstable isotopes can be useful
A) catalysts.
B) in medical diagnosis.
C) in vitamins.
D) in the formation of hydrogen bonds.
E) as buffers.
B
Bloom's Taxonomy: Application
Section: Atoms
Learning Outcome: 2.4
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Xenotransplantation refers to
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Cells produced by dividing B or T cells may immediately begin to destroy an invader. These cells are
called a. effector cells. b. memory cells. c. dendritic cells. d. phagocytes. e. fibroblasts.
Which of the following is a feature of an endocrine gland?
A. the product of these glands is carried into the lumen of an organ B. secretes a hormone into a gland or duct C. they do not respond to a negative feedback system D. secretes a hormone directly into the bloodstream E. characterized by the salivary glands