The ________ connects the third and fourth ventricles.
Fill in the blank(s) with the appropriate word(s).
aqueduct of the midbrain (or aqueduct of Sylvius or cerebral aqueduct
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Cushing's syndrome causes weight ________, and Graves' disease causes weight ________.
A. gain; loss B. loss; loss C. loss; gain D. gain; gain
The function of the secretions of a serous membrane, like the pleura, is to
a) separate the thoracic and abdominal cavities. b) protect the central nervous system. c) prevent infection. d) reduce friction between neighboring organs. e) carry nervous impulses.
A 6-year-old girl comes to her pediatri- cian with constipation, abdominal disten- tion, and vomiting. After thorough examina- tion, she is diagnosed as having Hirschsprung's disease (aganglionic megaco- lon), which is a congenital disease and leads to dilation of the colon. This condition is caused by an absence of which of the following kinds of neural cell bodies?
(A) Sympathetic preganglionic neuron cell bodies (B) Sympathetic postganglionic neuron cell bodies (C) Parasympathetic preganglionic neuron cell bodies (D) Parasympathetic postganglionic neuron cell bodies (E) Sensory neuron cell bodies
Exogenous and endogenous opioids have both similar and varying effects. Choose the statement that correctly summarizes their differences.
A. Exogenous, but not endogenous, can block transmissions of pain. B. Naloxone has been shown to block the proven actions of both exogenous and endogenous opioids. C. Like exogenous opioids like morphine, endogenous opioids cause strong feelings of euphoria. D. Endogenous are found in the CNS, whereas exogenous are released from neurons in the PNS.