The central idea for understanding the general stability of body function is the principle of ______.
Fill in the blank(s) with the appropriate word(s).
Answer: Homeostasis
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Potassium ion channels open ____, resulting in ____
a. as the action potential passes down the axon; a more negatively charged axon cytoplasm b. when the threshold potential is reached; the opening of more sodium channels c. during the resting potential; the diffusion of sodium ions into the axon cytoplasm d. when the action potential reaches the axon terminal; a more positively charged axon cytoplasm e. when neurotransmitters attach to dendrite receptors; no difference in the charge of the axon cytoplasm
Changes in heritable traits result from adaptation to environmental influences
Indicate whether the statement is true or false
Four of the following are features found exclusively among all vertebrates. Which one is the exception?
a. notochord
b. pharyngeal gill slits
c. four legs
d. post-anal tail
e. dorsal nerve cord
Which of the following is not a product or reactant of glycolysis?
a. NADH b. ATP c. pyruvate d. oxygen