A defect in the transport of ____ ions would have the most direct effect on muscle contraction
a. Cl?
b. K+
c. Ca2+
d. Na+Zn2+
e. Zn2+
ANSWER: c
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In an experiment the subjects or items being investigated are divided into the experimental group and
(a) the nonexperimental group. (b) the control group. (c) the statistics group. (d) none of these choices.
The processes of natural selection are non-random and lead to the incorporation of only favorable traits in succeeding generations
Indicate whether the statement is true or false
When an action potential begins
a. sodium is blocked from leaving the neuron cytoplasm. b. sodium is blocked from entering the neuron cytoplasm. c. sodium diffuses from the interstitial fluid into the neuron cytoplasm. d. sodium diffuses from the neuron cytoplasm into the interstitial fluid. e. sodium is actively pumped from the interstitial fluid into the neuron cytoplasm
Which of the following is used as an electron carrier by living organisms?
A. Ubiquinone B. NADP+ C. NAD+ D. All of the choices are correct.