The Frank-Starling mechanism of the heart describes:
a. the relationship between end-systolic volume and stroke volume
b. the relationship between length and tension in cardiac muscle cells
c. the relationship between sympathetic stimulation and stroke volume
d. the relationship between arterial blood pressure and stroke volume
Answer: b. the relationship between length and tension in cardiac muscle cells
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Injections of gamma globulin are sometimes given to provide
A. naturally acquired active immunity. B. artificially acquired passive immunity. C. artificially acquired active immunity. D. naturally acquired passive immunity.
Name the layer labeled A
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