Match the phrase to either the sympathetic or parasympathetic division of the autonomic nervous system.Fight-or-flight response
A. Sympathetic
B. Parasympathetic
Answer: A
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What is the general purpose of positive feedback mechanisms?
A. To detect changes in the external environment B. To bring about a rapid change in the body C. To maintain a constant internal environment D. To return a variable toward the set point E. To anticipate changes in the environment
Spinal interneurons prevent muscle antagonists from interfering with an intended movement by
A) activating reverberating circuits. B) initiating a tendon reflex. C) initiating a crossed extensor reflex. D) the process of reciprocal inhibition. E) initiating a stretch reflex.
The cells in heart muscle are often held together by areas called _____.
A) desmosomes B) tight junctions C) gap junctions D) intercellular fluid
Which of the following is not a role of calcium in the body?
A. It is important in blood clotting. B. It participates in muscle contraction. C. It is a significant component of nucleic acids. D. They serve as second messengers. E. It activates exocytosis.