Endocrine glands have ducts
a. True
b. False
Indicate whether the statement is true or false
False
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The action potential of a muscle fiber occurs
A. at the end plate. B. along the sarcolemma and down the T-tubules. C. within the sarcoplasmic reticulum. D. in the mitochondria.
Select the best description of the negative selection process of lymphocyte maturation
A) removal of lymphocytes that fail to recognize "self" cells B) teaching a lymphocyte to recognize "self" from foreign antigens C) removal of lymphocytes that react with "self" cells D) allowing the survival of lymphocytes that cannot bind to MHC proteins
Because the plasmalemma is relatively permeable to water, the process of ________ keeps water concentration in the extracellular and intracellular fluids equal.
Fill in the blank(s) with the appropriate word(s).
What portion of the cell cycle is actually devoted to cell division?
A. Interphase B. Cellphase C. Duophase D. Mitotic phase