The placenta and membranes surrounding the embryo develop from the ________.
A. blastocyst
B. inner cell mass
C. blastocele
D. morula
E. trophoblast
Answer: E
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________ is a condition in which chronic low levels of oxygen (due to lung disease or living in high altitudes) cause the body to produce more than normal amounts of erythrocytes to transport more efficiently the smaller amounts of available oxygen
A) Primary erythrocytopenia B) Primary polycythemia C) Secondary polycythemia D) Secondary erythrocytopenia
Select the incorrect statement about slow pain
a. It is carried by large, myelinated A-delta fibers. b. It is poorly localized. c. It occurs by the stimulation of polymodal nociceptors. d. It occurs for a longer time than fast pain. e. It produces a dull, aching, burning sensation.
Degeneration of the neurons in which of the following structures leads to the muscle tremors associated with Parkinson disease?
A. Cerebral crus B. Inferior colliculi C. Pons D. Tegmentum E. Substantia nigra
Apnea is the slowing of respiration as occurs during sleep.
Answer the following statement true (T) or false (F)