Epithelial tissue ________
A) None of the listed responses is correct.
B) has two free surfaces
C) does not have cell junctions
D) is avascular
D
Explanation:
A) One of the listed responses is correct.
B) An epithelium always has one free surface where the cells are exposed either to the external environment or to an internal passageway.
C) Epithelium is made up of sheets of cells, with the cells tightly joined together by a variety of strong intercellular connections.
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The maintenance of blood flow by tissues is called ________.
Fill in the blank(s) with the appropriate word(s).
Match the cell type with the hormone produced by that cell type.A. MineralocorticoidsB. PTHC. InsulinD. ADHE. T3Follicular cells of thyroid
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT true of a steroid hormone?
A. The hormone-receptor complex binds to DNA. B. It activates a second messenger to cause cellular changes. C. It diffuses into the cell and binds to its receptor protein. D. Intracellular enzymes, made from the DNA, direct cellular changes.