Nicotine mimics ____ in its effects on the nervous system
a. adrenalin
b. acetylcholine
c. dopamine
d. endorphins
e. analgesics
B
You might also like to view...
Sodium has one valence electron in its third energy level. To reach a stable energy configuration,
sodium will tend to
a. take up an electron from another atom. b. move its valence electron to the second energy shell. c. give up an electron to another atom. d. share its valence electron with another atom. e. move an electron from the second energy level to the valence shell.
Which of the following statements is
CORRECT?
a. A population cannot exceed the carrying capacity even temporarily. b. An organism can occupy more than one trophic level, depending upon the feeding habits of the organism. c. Once populations of organisms become isolated, they remain so by various types of isolation mechanisms. d. The limits of a population are all traced to climatic or physical factors. e. Organisms with different evolutionary backgrounds can occupy the same niche at the same time.
Members of the genus Actinomyces are either straight or slightly curved rods, or slender filaments with true branching.
Answer the following statement true (T) or false (F)
The state of California has several large cities and very productive croplands that divert and use large amounts of water from rivers. What is one damaging effect of this use of water from the rivers?
A. increased amounts of solid waste pollution in the oceans B. decreased amounts of fresh water in marshes and estuaries C. changes in local rainfall amounts D. changes in upstream water tables