Moving your arm away from your torso is known as ________
A) abduction
B) flexion
C) adduction
D) circumduction
A
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Which of the following choices best describes the autonomic nervous system?
A) motor fibers that send commands to smooth muscles, cardiac muscles, and glands B) motor fibers that conduct impulses from the CNS to skeletal muscle C) sensory neurons that carry impulses from the body to the CNS D) sensory and motor neurons that supply the digestive tract
During a muscle action potential, calcium is released into the sarcoplasm, near the actin and myosin molecules. Which of the following is the best explanation of what the calcium does?
A) The calcium binds to the actin and myosin and makes them work together. B) The calcium breaks apart ATP to ADP and P. C) The calcium removes the tropomyosin block. D) The calcium causes the release of acetylcholine.
In humans, the blood vessels of the allantois become the umbilical blood vessels?
a. true b. false
Which is the most common white blood cell?
A. Lymphocyte B. Monocyte C. Neutrophil D. Basophil