Eumelanin and pheomelanin are
A. reddish-yellow and brownish-black pigments, respectively.
B. brownish-black and reddish-yellow pigments, respectively.
C. present in excess in a person with albinism.
D. types of keratin.
Answer: B
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a. increased production of RBCs b. increasing viscosity of blood c. the stopping of hemorrhage d. decreasing blood pressure e. reducing in blood pH
Which of the following is NOT a step in preparing a wet-mount slide?
A) Using tweezers or your fingers, touch the water stain with the edge of the coverslip. B) Place the specimen on the slide and add a small drop of water to it. C) Do not use a coverslip with a wet-mount preparation. D) Use the coarse adjustment knob to move the objective lens as close to the specimen as possible without touching the slide.
Which of the following processes are functionally opposite to one another?
A) phagocytosis and pinocytosis B) osmosis and simple diffusion C) simple diffusion and facilitated diffusion D) endocytosis and exocytosis
The subatomic particles that are responsible for the chemical behavior of atoms are the ________
A) protons B) neutrons C) electrons D) isotopes E) ions