Which disorder describes a group of genetic disorders that result in progressive weakening, degeneration, and replacement of muscle tissue with fibrous scar tissue?

A. Muscular dystrophy
B. Cramp
C. Myasthenia gravis
D. Hernia


Answer: A

Anatomy & Physiology

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The bone cells that contribute to increases in calcium in blood are the

A) chondrocytes. B) osteons. C) osteoclasts. D) osteocytes. E) osteoblasts.

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Antidiuretic hormone (ADH)

A. increases plasma osmolality. B. increases water reabsorption in the kidneys. C. is secreted by the anterior pituitary. D. causes the production of a large volume of urine. E. increases urine volume.

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Why do our cells need enzymes?

A) Enzymes are important sources of nutrients. B) Enzymes are important inorganic compounds used by cells. C) Enzymes provide the activation energy of a reaction so it can occur. D) Enzymes lower the activation energy of a reaction so it can occur. E) Enzymes increase the activation energy of a reaction so it can occur.

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Which of the following is the largest in size?

A) mature sperm cell B) mature egg cell C) polar body D) they are all approximately the same size

Anatomy & Physiology