What makes an isotope radioactive?

A. It releases energy to become stable.
B. It releases hydrogen ions into solution.
C. It breaks down into hydrogen and electrons.
D. It has more protons than electrons.


Answer: A

Anatomy & Physiology

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Which of the following gases does endothelium release?

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Which of the following is a molecule that binds to a receptor?

A) acetylcholine B) tropomyosin C) acetylcholinesterase D) all of the above

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The salivary glands under the tongue are called the

A) submandibular glands B) sublingual glands C) parotid glands D) submaxillary glands

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Conscious interpretation of external stimuli

a. is sensation b. rarely occurs c. is perception d. is processed in the diencephalon e. is none of the above

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