Which of the following is a nonsalt molecule that contributes to the hypertonicity of the interstitial fluid of the renal tubules?

A. Urea
B. Xenobiotic molecule
C. Protein
D. Creatinine


Answer: A

Anatomy & Physiology

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The division of the zygote into two blastomeres occurs during

A) cleavage. B) implantation. C) placentation. D) embryogenesis. E) fertilization.

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Which of the following occurs during the latent period of muscle contraction?

A) An action potential is generated. B) Calcium is released from the sarcoplasmic reticulum. C) Acetylcholine is released at the axon terminal and an action potential is generated. D) Acetylcholine is released at the axon terminal

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Which of the following is NOT true of the epidural space?

A. It contains cerebrospinal fluid. B. It contains connective tissue and blood vessels. C. It lies between the vertebrae and the dura mater. D. It is the site for epidural injections of anesthetics. E. All of these are true of the epidural space.

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Changes that occur as death approaches include

A. prolonged high blood pressure. B. limbs become cool and numb. C. flushing of the skin. D. sudden high-grade fevers.

Anatomy & Physiology