The movement of chromosomes during mitosis is due to ________.
spindle fibers
telomeres
chromatids
actin and myosin
spindle fibers
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Manufacturers of some medications used to treat heartburn advertise that their products shut down the acid-producing pumps in the stomach. Where are these "acid-producing pumps"? In other words, which type of gastric gland cell secretes acid?
A. Chief cells B. Parietal cells C. Mucous neck cells D. Surface mucous cells E. Enteroendocrine cells
Which substance is not reabsorbed by the proximal convoluted tubule?
A. Glucose B. Sodium C. Water D. Potassium E. Creatinine
Decussation of pyramids refers to crossover of major motor tracts in the ________ region of the brain
A) medulla oblongata B) mid brain C) thalamus D) pons
How does the brain distinguish high-pitched from low-pitched sounds?
A. High-pitched sounds stimulate hair cells near the tip of the cochlea. B. Low-pitched sounds cause the cochlear nerve fibers to fire more rapidly. C. High-pitched sounds cause the basilar membrane to vibrate more vigorously. D. High-pitched sounds cause the cochlear nerve fibers to fire more rapidly. E. Low-pitched sounds stimulate hair cells near the tip of the cochlea.