The central canal is a remnant of what embryonic structure?
A. The neural crest
B. The neural folds
C. The neural tube
D. The telencephalon
E. The rhombencephalon
C. The neural tube
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The ________ covers the outer surface of the heart
A) epicardium B) myocardium C) endocardium D) parietal pericardium E) mediastinum
The thin sheet of lubricant that is secreted between serous membrane layers is referred to as ________.
Fill in the blank(s) with the appropriate word(s).
When shoveling snow from the driveway, the older man did not feel the bitter cold. Which action made his blood vessels get smaller in diameter, conserving heat in the warm core of his body?
A. Vasomotor B. Vasodilation C. Vasoconstriction D. Vasopressor
The lateral horns of the gray matter in the thoracic region of the spinal cord contain the cell bodies of
A) the medulla oblongata. B) all motor neurons for that body segment. C) autonomic neurons. D) sensory neurons.