The epidermis (outer layer of the skin) needs to be tough and resistant to shearing and stretching. The type of intercellular junction best suited for this need is a(n) ________.
A. gap junction
B. ion channel
C. desmosome
D. tight junction
Answer: C
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The enzyme with the lowest pH optimum is ________.
A. lipase B. pepsin C. acid phosphatase D. monoamine oxidase
Among the advantages of the cerebral arterial circle is the presence of collateral channels of blood flow to the brain should a supply artery become blocked
Indicate whether this statement is true or false.
In traveling from the heart to the peripheral capillaries, blood passes through:
arteries, arterioles, and venules elastic arteries, muscular arteries, and arterioles veins, venules, and arterioles arteries, venules, veins all of the choices are correct
Is it necessary for a cell to produce one enzyme molecule for every substrate molecule that needs to be catalyzed? Why or why not?
What will be an ideal response?