Premature closure of the epiphyseal plates could be caused by
A) elevated levels of sex hormones.
B) too little thyroxine.
C) an excess of growth hormone.
D) too much calcium in the diet.
E) high levels of vitamin D3.
A) elevated levels of sex hormones.
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What injury can occur when the neck undergoes sudden acceleration and deceleration (such as in a car accident)?
A. herniated disc B. whiplash C. spondylolisthesis D. spondylolysis
Passive transport refers to a process that requires
A) no pressure gradient. B) no energy at all. C) no electrical gradient. D) no concentration gradient. E) no cellular energy.
The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "C"?
A. contains digestive enzymes B. directs cellular activities, contains DNA C. outer boundary of cell, controls entry and exit of substances D. major site of ATP synthesis when oxygen is available E. site of protein synthesis
A diet rich in animal protein contributes to increased levels of
A. fixed acid. B. bicarbonate ions. C. volatile acid.