On being released into the blood from either the bone marrow or the spleen, mature A and B cells take up residence and establish lymphocyte colonies in the peripheral lymphoid tissues
a. True
b. False
Indicate whether the statement is true or false
False
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The salivary glands are composed of which two types of secretory cells?
A) goblet cells and squamous epithelial cells B) parietal cells and glial cells C) serous cells and mucous cells D) cuboidal epithelium and ciliated columnar cells
Signs of aging at the cellular level are (Select all that apply)
A) impaired cell division and the ability to break down and recycle worn cell parts. B) unrepaired DNA and abnormal proteins. C) a fatty liver and clogged blood vessels. D) graying hair, waning strength, and wrinkles.
What element is found in all living matter?
a. nitrogen b. carbon c. lithium d. oxygen
Due to the contraction of smooth muscle in the walls of the dermal blood vessels,
A. body heat is conserved. B. more blood enters into the heart. C. more blood flows to the skin. D. body temperature tends to drop in that area. E. the blood vessels become dilated.