The layer between the tunica media and the tunica externa in a large artery is the
A) tunica intima.
B) external elastic membrane.
C) tunica media.
D) internal elastic membrane.
E) tunica externa.
Answer: B
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Which of the following account for why the number of bones in the adult skeleton may vary. Select all that apply.
__X__ There is a variable presence of sesamoid bones. _____ Some bones may disappear in response to mechanical stress. __X__ There is a variable number of sutural bones. _____ There are fontanels in the skull of an infant.
The first set of teeth to appear are the ________ teeth.
A) permanent B) succession C) secondary D) impacted E) deciduous
Body membranes are composed of ________ tissues
A) connective and muscle B) epithelium and muscle C) epithelium and connective D) connective and nervous
The motor pathway of the autonomic nervous system usually involves ________ neurons.
A. no B. three C. two D. one E. four