The theory that describes how skeletal muscles contract is the ____

a. sarcomere shortening theory
b. rigor mortis theory
c. Z-line movement theory
d. spring filament theory
e. sliding filament theory


ANSWER: e

Biology & Microbiology

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Which of the following is TRUE when comparing solutions with a pH of 6 and a pH of 8?

A. The solution with a pH of 8 has a 100 times higher concentration of hydrogen ions than a solution with a pH of 6. B. The solution with a pH of 8 has a 2 times higher concentration of hydrogen ions than a solution with a pH of 6. C. The solution with a pH of 8 has a 100 times lower concentration of hydrogen ions than a solution with a pH of 6. D. The solution with a pH of 8 has a 2 times lower concentration of hydrogen ions than a solution with a pH of 6. E. The hydrogen ion concentration does not appreciably differ between a solution with a pH of 8 versus that with a pH of 6.

Biology & Microbiology

The most used EIA for antigen detection that uses a solid phase and membrane is used for detecting which virus?

a. Influenza b. Adenovirus c. HSV d. Respiratory syncytial virus (RSV)

Biology & Microbiology

Secondary succession occurs

a. after a fire. b. on a new volcanic island. c. on bare rock. d. on land exposed as a glacier retreats. e. none of these

Biology & Microbiology

Aluminum is toxic to many aquatic species

Indicate whether the statement is true or false

Biology & Microbiology