The cranial nerves are basically numbered from superior to inferior.
Answer the following statement true (T) or false (F)
False
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During contraction of skeletal muscle fibers, the
a. contractile proteins contract. b. thin filaments slide inward toward the A band's center as a result of cycles of cross-bridge binding and bending. c. thick and thin filaments become tightly coiled, thus shortening the sarcomere. d. I bands slide in between the A bands. e. lateral sacs of the sarcoplasmic reticulum shrink, pulling the Z lines closer together.
The right atrium receives blood from the:
What will be an ideal response?
Which of the following is NOT an example of an inclusion?
A. Melanin B. Triglycerides C. Glycogen D. Actin
Which of the following statements regarding Ca2+ homeostasis is TRUE?
A. Parathyroid hormone directly stimulates Ca2+ reabsorption by the kidneys. B. Parathyroid hormone directly stimulates Ca2+ absorption from the GI tract. C. In the absence of parathyroid hormone, plasma Ca2+ levels would be abnormally low, resulting in the hyperpolarization of nerve and muscle membranes. D. When plasma Ca2+ increases above normal, the secretion of parathyroid hormone increases. E. Vitamin D decreases the renal tubular reabsorption of Ca2+.