With __________, an animal modifies a voluntary behavior in response to the behavior's consequences.
Fill in the blank(s) with the appropriate word(s).
operant conditioning
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The large number of alveoli in lungs improve gas exchange by _____.
A. increasing the concentration difference B. changing the diffusion constant C. decreasing the distance for diffusion D. increasing the surface area for diffusion
The force exerted by blood on the wall of a blood vessel is known as ________
Fill in the blank(s) with correct word
Which of the following would be an effective approach to a new cancer therapy?
A. finding a way to stabilize p53 specifically in tumor cells B. preventing nucleotide synthesis in tumor cells C. inactivating the HER2 receptor on tumor cells D. inhibiting growth of new blood vessels with endostatin E. All of the above would help to fight cancer.
Which one of these is a nitrate?
a. NH4- b. NH2 c. NO2- d. SH e. NO3-