All of the following is a function of tears except
A) lubricates the eye.
B) washes away debris.
C) provides oxygen.
D) nourishes the cornea and conjunctiva.
E) maintains acidic environment.
Answer: E
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Dead skin cells are shed in thin sheets because they are held together by "spots" of proteoglycan reinforced by intermediate filaments. Such strong intercellular connections are called
A) gap junctions. B) intermediate junctions. C) tight junctions. D) desmosomes. E) junctional complexes.
What are the levers that operate at a mechanical advantage called?
A) speed levers B) power levers C) functional levers D) dysfunctional levers
The functional unit of the kidney that produces urine is the
A. Pelvis. B. Nephron. C. Pyramid. D. Neuron.
Which of the following is NOT a mechanism of complement action?
A. produces cytokines B. opsonization C. attracts other immune cells to the site of infection D. forms a MAC that leads to cell lysis