Some marrow of long bones is termed "yellow" marrow under normal conditions. The function of yellow marrow is to
A. manufacture blood cells.
B. store adipose tissue.
C. make vitamin D.
D. manufacture tissue cells for the skin.
E. store bone-forming cells.
Answer: B
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Electrical signals move through the mammalian heart in a particular order. Which order is correct?
A) SA node; internodal pathway; AV node; bundle of His; Purkinje fibers B) AV node; SA node; internodal pathway; bundle of His; Purkinje fibers C) SA node; AV node; internodal pathway; Purkinje fibers; bundle of His D) Bundle of His; Purkinje fibers; internodal pathway; AV node; SA node
Nonspecific immune responses
a. come into play whether or not there has been prior experience with the offending agent b. are triggered by invasion of infectious microorganisms, chemical injury, mechanical trauma, or burns c. are mediated by lymphocytes d. have characteristics a and b e. have none of the above characteristics
Which of the following does NOT characterize a reflex?
A) The motor response to a stimulus is rapid. B) Neural integration of a reflex usually occurs in the PNS. C) A reflex is an automatic response to a stimulus. D) Reflexes require a stimulus to initiate a motor response.
When dissecting a sheep's brain, a midsagittal cut slices ________
A) between the cerebellum and cerebrum B) through the longitudinal fissure C) through the parieto-occipital sulcus D) through the central sulcus