The electrochemical gradient refers to
A. the difference in concentration of a substance between two areas.
B. the difference in electrical charge between two areas.
C. the resistance a membrane has to allowing any charged chemical to pass through it.
D. the combination of electrical and chemical gradients between two areas.
Answer: D
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Using the figure below, identify the labeled part.
1. Label A: ______________________________
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1.3 Label M: ______________________________
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Melanin production is greater in the skin of people who live outdoors all the time than in
people who do not. Indicate whether the statement is true or false
Is cardiac output greater on L or R side of heart? In other words, which ventricle pumps more blood per heart beat?
a. Left b. Right c. Same
An area of the heart other than the SA node can become the pacemaker if its contraction rate is faster. This area would be called a(an)
A. interventricular septum. B. intrinsic conduction system. C. ectopic pacemaker. D. heart block.