Gray matter is composed mostly of
A. myelinated axons.
B. cell bodies and dendrites.
C. tracts.
Answer: B
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Diapedesis is the means by which a leukocyte reproduces
Indicate whether the statement is true or false
Describe the role of preganglionic neurons
A) They are part of visceral reflex arcs, and most of their activity is a direct reflex response, rather than responses to commands from the hypothalamus. B) They are part of the visceral motor neurons in peripheral ganglia. C) They are ganglionic neurons that innervate visceral effectors. D) They are upper motor neurons whose cell bodies lie within nuclei of the brain or the primary motor cortex. E) They are motor neurons within the central nervous system that are controlled by reflexes based in the spinal cord or brain.
The most significant complication of infant prematurity is infant respiratory distress syndrome, which occurs because very young premature infants cannot produce ______________
A. surfactant B. blood C. oxygen D. erythropoietin E. growth hormone
The pericardial cavity is between the
A. visceral and parietal layers of the serous pericardium. B. fibrous and serous layers of the pericardium. C. parietal and myocardial layers of the fibrous pericardium. D. heart muscle and serous pericardium.