All ribs articulate with the sternum.
Answer the following statement true (T) or false (F)
False
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The primary role of epithelial tissue in the stomach is
A. housing blood vessels and nerves. B. secretion of substances for chemical digestion. C. mixing and propulsion of foodstuffs. D. regulation of contraction.
Erection
a. involves dilation of the arterioles supplying the sponge-like vascular spaces of the penis b. results from cGMP production induced by nitric oxide c. occurs when the seminiferous tubules of the penis become engorged with sperm d. occurs in response to sympathetic nervous stimulation of the penis e. has both a and b characteristics
Which of the following structures of the cardiac conduction system transmits electrical signals directly to the Purkinje fibers?
A. AV bundle B. AV node C. Internodal fibers D. Right and left bundle branches E. SA node
What is the estimated number of neurons in the brain?
a. 850 million b. 8.5 billion c. 85 billion d. 850 billion e. 850 trillion