What flexible, crystal-like structure of the eye focuses light on the retina?
A) iris
B) sclera
C) lens
D) choroid
E) optic chiasma
C
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Which hormone increases calcium and phosphate ion absorption by the intestines?
A) parathyroid hormone B) calcitriol C) thyroxine D) calcitonin E) estrogen
Which hormone ultimately stimulates the activity of osteoclasts and promotes increased calcium absorption in the digestive tract?
A. Triiodothyronine B. Calcitonin C. Parathyroid hormone (PTH) D. Growth hormone (GH) E. Somatostatin
Describe the body's primary and secondary immune responses
What will be an ideal response?
The upper limb and its girdle are attached rather loosely to the rest of the body. This arrangement
A. results in a disjointed appearance. B. limits fine coordination of the hands. C. allows a wide range of movements. D. restricts the amount of weight the upper limb can support. E. results in a limited range of motion.