The lens
A. is biconcave.
B. focuses light on the retina.
C. floats in the vitreous humor.
D. is attached to the retina by suspensory ligaments.
E. is normally opaque.
B
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Within the periodic table, elements are organized consecutively by
A. atomic mass within columns.?B. atomic mass within rows.?C. atomic number within columns.?D. atomic number within rows.
After being funneled by the auricle, sound waves pass (in sequence) through the
A. external acoustic meatus, tympanic membrane, ossicles, and oval window. B. external acoustic meatus, oval window, ossicles, and cochlea. C. external acoustic meatus, tympanic membrane, internal acoustic meatus, and oval window. D. internal acoustic meatus, tympanic membrane, oval window, and ossicles. E. internal acoustic meatus, tympanic membrane, ossicles, and round window.
Answer the following statements true (T) or false (F)
1. The tonsils are part of the lymphatic system. 2. Lymph contains both tissue fluid and red blood cells. 3. The thoracic duct helps return lymph to the blood. 4. The lymphatic system is important in the functioning of the immune system. 5. The tiny, thin-walled sacs in the lung are called bronchioles.
People with myasthenia gravis have a deficiency of
A) acetylcholine receptors B) titin molecules. C) troponin molecules. D) sarcomeres.