What is the importance of the secondary curves of the spine?
A) The secondary curves allow us to balance our body weight to permit an upright posture.
B) The secondary curves surround the lungs and expand allowing us to breathe.
C) The secondary curves accommodate the thoracic organs.
D) The secondary curves accommodates the abdominopelvic organs.
E) The secondary curves enclose the spinal cord.
Answer: A
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Identify the true statement(s) about receptors:
a. They may be a specialized ending of an afferent neuron b. They exist that are specific for every modality in the environment c. When stimulated enough may cause Na+ channels in the afferent neuron to open d. They may be cells closely associated with the peripheral endings of afferent neurons e. All of the above are true.
Which of the following is a conducting zone structure?
A) respiratory bronchiole B) terminal bronchiole C) alveolar sac D) alveolar duct
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