Myofibrils are made primarily of
A) actin and myosin.
B) epimysium.
C) ATP and ADP.
D) troponin.
E) tropomyosin.
A) actin and myosin.
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Which of the following statements best describes relaxin?
A. Relaxin is produced by the testes and stimulates secretion of the reproductive glands. B. Relaxin is produced by the ovaries and increases the flexibility of connective tissue. C. Relaxin is produced by the adrenal cortex and maintains normal metabolism. D. Relaxin is produced by the parathyroid glands and triggers the release of calcium from the bones.
Gas exchange is a function of the
A) cardiovascular system. B) lymphoid system. C) respiratory system. D) urinary system. E) endocrine system.
________ is a progressive degeneration of the myelin sheath around the axons in the CNS.
A. Multiple sclerosis B. Alzheimer disease C. Parkinson disease D. Shingles
The part of the brain that assigns value to a memory is the
A. pons. B. amygdala. C. medulla oblongata. D. cerebral cortex.