Which type of leukocyte has a derivative known as the plasma cell?
a. neutrophil
b. B lymphocyte
c. T lymphocyte
d. macrophage
e. basophil
B
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Upon cold exposure all of the following occur except
a. skin vasoconstriction. b. decreased muscle tone. c. nonshivering thermogenesis. d. behavioral adaptations. e. stimulation of thermoreceptors.
The embryonic forebrain, midbrain, and hindbrain arise from which structure?
A. The neural crest B. The neural tube C. The telencephalon D. The mesoderm E. The neural folds
In appositional growth of cartilage,
A. new chondrocytes and new matrix are added on the outside of the tissue. B. the tissue becomes vascularized in order to grow. C. chondroblasts within the tissue proliferate and add more matrix from the inside. D. the cartilage is replaced with another kind of connective tissue. E. osteoblasts replace the chondroblasts.
It is important that flow of blood in the ________ is slow, allowing time for nutrients and wastes to be exchanged between the blood and tissues.
Fill in the blank(s) with the appropriate word(s).