Experimentally sending sustained stimulation to a muscle fiber causes ________
a. tetanus
b. a period of insensitivity to further stimulation
c. a twitch
d. a forceful contraction
a
Biology & Microbiology
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Enzymes function by
a. being consumed (used up) in the reaction. b. lowering the activation energy of a reaction. c. combining with otherwise toxic substances in the cell. d. adding heat to the cell to speed up the reaction.
Biology & Microbiology
Which system is an internal system of regulation and communication involving hormones, glands, and target cells?
What will be an ideal response?
Biology & Microbiology
Anthropoids or higher primates include all of the following except
A. New World monkeys. B. apes. C. Old World monkeys. D. humans. E. lemurs.
Biology & Microbiology
Identify and briefly describe the function of the labeled structures on the sperm in the picture.
What will be an ideal response?
Biology & Microbiology