All of the following are primary tissue types except
A) Connective.
B) Fibrous.
C) Nervous.
D) Epithelial.
E) Muscular.
Ans: B) Fibrous.
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Most sensory neurons are ____ neurons
a. multipolar b. interneurons c. unipolar d. bipolar
Stimulation of a receptor alters its membrane permeability, usually by opening channels that permit an influx of what ions?
a. calcium b. chloride c. potassium d. sodium e. iron
Why might someone pale when they are exposed to a cold temperature?
A. Constriction of the dermal collagen and elastic fibers B. Purely psychological C. Dehydration of the stratum corneum D. Vasoconstriction has occurred E. Vasodilation has occurred
Which of the following are ways in which binding of an intercellular chemical messenger with a cell's receptor can bring about a cellular response?
A. opening or closing of specific ionic channels in the plasma membrane B. activation of an intracellular second-messenger system C. promoting or inhibiting the transcription of genes that code for the synthesis of cellular proteins D. activating or inhibiting intracellular enzymes E. All of the choices are correct.